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Open Access#12019

Measuring K0sK± interactions using pp collisions at √s=7 TeV

S., Acharya; Boca, G; Bock, F; Bogdanov, A; Boldizsár, L; Bolozdynya, A; Bombara, M; Bonomi, G

S., Acharya; Boca, G; Bock, F; Bogdanov, A; Boldizsár, L; Bolozdynya, A; Bombara, M; Bonomi, G; Bonora, M; Borel, H; Borissov, A; Borri, M; Botta, E; Bourjau, C; Bratrud, L; Braun-Munzinger, P; Bregant, M; Broker, T.A; Broz, M; Brucken, E.J; Bruna, E; Bruno, G.E; Budnikov, D; Buesching, H; Bufalino, S; Buhler, P; Buncic, P; Busch, O; Buthelezi, Z; Butt, J.B; Buxton, J.T; Cabala, J; Caffarri, D; Caines, H; Caliva, A; Calvo Villar, E; Camacho, R.S; Camerini, P; Capon, A.A; Carena, W; Carnesecchi, F; Castillo Castellanos, J; Castro, A.J; Casula, E.A.R; Ceballos Sanchez, C; Chandra, S; Chang, B; Chang, W; Chapeland, S; Chartier, M; Chattopadhyay, S; Chauvin, A; Cheshkov, C; Cheynis, B; Chibante Barroso, V; Chinellato, D.D; Cho, S; Chochula, P; Chowdhury, T; Christakoglou, P; Christensen, C.H; Christiansen, P; Chujo, T; Chung, S.U; Cicalo, C; Cifarelli, L; Cindolo, F; Cleymans, J; Colamaria, F; Colella, D; Collu, A; Colocci, M; Concas, M; Conesa Balbastre, G; Conesa del Valle, Z; Contreras, J.G; Cormier, T.M; Corrales Morales, Y; Cortese, P; Cosentino, M.R; Costa, F; Costanza, S; Crkovská, J; Crochet, P; Cuautle, E; Cunqueiro, L; Dabrowski, D; Dahms, T; Dainese, A; Damas, F.P.A; Dani, S; Danisch, M.C; Danu, A; Das, D; Das, I; Das, S; Dash, A; Dash, S; De, S; De Caro, A; de Cataldo, G; de Conti, C; de Cuveland, J; De Falco, A; De Gruttola, D; De Marco, N; De Pasquale, S; De Souza, R.D; Degenhardt, H.F; Deisting, A; Deloff, A; Delsanto, S; Deplano, C; Dhankher, P; Di Bari, D; Di Mauro, A; Di Ruzza, B; Diaz, R.A; Dietel, T; Dillenseger, P; Ding, Y; Divià, R; Djuvsland, Ø; Dobrin, A; Domenicis Gimenez, D; Dönigus, B; Dordic, O; Dubey, A.K; Dubla, A; Ducroux, L; Dudi, S; Duggal, A.K; Dukhishyam, M; Dupieux, P; Ehlers, R.J; Elia, D; Endress, E; Engel, H; Epple, E; Erazmus, B; Erhardt, F; Erokhin, A; Ersdal, M.R; Espagnon, B; Eulisse, G; Eum, J; Evans, D; Evdokimov, S; Fabbietti, L; Faggin, M; Faivre, J; Fantoni, A; Fasel, M; Feldkamp, L; Feliciello, A; Feofilov, G; Fernández Téllez, A; Ferretti, A; Festanti, A; Feuillard, V.J.G; Figiel, J; Figueredo, M.A.S; Filchagin, S; Finogeev, D; Fionda, F.M; Fiorenza, G; Flor, F; Floris, M; Foertsch, S; Foka, P; Fokin, S; Fragiacomo, E; Francescon, A; Francisco, A; Frankenfeld, U; Fronze, G.G; Fuchs, U; Furget, C; Furs, A; Fusco Girard, M; Gaardhøje, J.J; Gagliardi, M; Gago, A.M; Gajdosova, K; Gallio, M; Galvan, C.D; Ganoti, P; Garabatos, C; Garcia-Solis, E; Garg, K; Gargiulo, C; Garner, K; Gasik, P; Gauger, E.F; Gay Ducati, M.B; Germain, M; Ghosh, J; Ghosh, P; Ghosh, S.K; Gianotti, P; Giubellino, P; Giubilato, P; Glässel, P; Goméz Coral, D.M; Gomez Ramirez, A; Gonzalez, V; González-Zamora, P; Gorbunov, S; Görlich, L; Gotovac, S; Grabski, V; Graczykowski, L.K; Graham, K.L; Greiner, L; Grelli, A; Grigoras, C; Grigoriev, V; Grigoryan, A; Grigoryan, S; Gronefeld, J.M; Grosa, F; Grosse-Oetringhaus, J.F; Grosso, R; Guernane, R; Guerzoni, B; Guittiere, M; Gulbrandsen, K; Gunji, T; Gupta, A; Gupta, R; Guzman, I.B; Haake, R; Habib, M.K; Hadjidakis, C; Hamagaki, H; Hamar, G; Hamid, M; Hamon, J.C; Hannigan, R; Haque, M.R; Harlenderova, A; Harris, J.W; Harton, A; Hassan, H; Hatzifotiadou, D; Hauer, P; Hayashi, S; Heckel, S.T; Hellbär, E; Helstrup, H; Herghelegiu, A; Hernandez, E.G; Herrera Corral, G; Herrmann, F; Hetland, K.F; Hilden, T.E; Hillemanns, H; Hills, C; Hippolyte, B; Hohlweger, B; Horak, D; Hornung, S; Hosokawa, R; Hota, J; Hristov, P; Huang, C; Hughes, C; Huhn, P; Humanic, T.J; Hushnud, H; Hussain, N; Hussain, T; Hutter, D; Hwang, D.S; Iddon, J.P; Ilkaev, R; Inaba, M; Ippolitov, M; Islam, M.S; Ivanov, M; Ivanov, V; Izucheev, V; Jacak, B; Jacazio, N; Jacobs, P.M; Jadhav, M.B; Jadlovska, S; Jadlovsky, J; Jaelani, S; Jahnke, C; Jakubowska, M.J; Janik, M.A; Jena, C; Jercic, M; Jevons, O; Jimenez Bustamante, R.T; Jin, M; Jones, P.G; Jusko, A; Kalinak, P; Kalweit, A; Kang, J.H; Kaplin, V; Kar, S; Karasu Uysal, A; Karavichev, O; Karavicheva, T; Karczmarczyk, P; Karpechev, E; Kebschull, U; Keidel, R; Keijdener, D.L.D; Keil, M; Ketzer, B; Khabanova, Z; Khan, A.M; Khan, S; Khan, S.A; Khanzadeev, A; Kharlov, Y; Khatun, A; Khuntia, A; Kielbowicz, M.M; Kileng, B; Kim, B; Kim, D; Kim, D.J; Kim, E.J; Kim, H; Kim, J.S; Kim, J; Kim, M; Kim, S; Kim, T; Kindra, K; Kirsch, S; Kisel, I; Kiselev, S; Kisiel, A; Klay, J.L; Klein, C; Klein, J; Klein-Bösing, C; Klewin, S; Kluge, A; Knichel, M.L; Knospe, A.G; Kobdaj, C; Kofarago, M; Köhler, M.K; Kollegger, T; Kondratyeva, N; Kondratyuk, E; Konevskikh, A; Konopka, P.J; Konyushikhin, M; Koska, L; Kovalenko, O; Kovalenko, V; Kowalski, M; Králik, I; Kravčáková, A; Kreis, L; Krivda, M; Krizek, F; Krüger, M; Kryshen, E; Krzewicki, M; Kubera, A.M; Kučera, V; Kuhn, C; Kuijer, P.G; Kumar, J; Kumar, L; Kumar, S; Kundu, S; Kurashvili, P; Kurepin, A; Kurepin, A.B; Kushpil, S; Kvapil, J; Kweon, M.J; Kwon, Y; La Pointe, S.L; La Rocca, P; Lai, Y.S; Lakomov, I; Langoy, R; Lapidus, K; Lardeux, A; Larionov, P; Laudi, E; Lavicka, R; Lea, R; Leardini, L; Lee, S; Lehas, F; Lehner, S; Lehrbach, J; Lemmon, R.C; León Monzón, I; Lévai, P; Li, X; Li, X.L; Lien, J; Lietava, R; Lim, B; Lindal, S; Lindenstruth, V; Lindsay, S.W; Lippmann, C; Lisa, M.A; Litichevskyi, V; Liu, A; Ljunggren, H.M; Llope, W.J; Lodato, D.F; Loginov, V; Loizides, C; Loncar, P; Lopez, X; López Torres, E; Luettig, P; Luhder, J.R; Lunardon, M; Luparello, G; Lupi, M; Maevskaya, A; Mager, M; Mahmood, S.M; Maire, A; Majka, R.D; Malaev, M; Malik, Q.W; Malinina, L; Mal'Kevich, D; Malzacher, P; Mamonov, A; Manko, V; Manso, F; Manzari, V; Mao, Y; Marchisone, M; Mareš, J; Margagliotti, G.V; Margotti, A; Margutti, J; Marín, A; Markert, C; Marquard, M; Martin, N.A; Martinengo, P; Martinez, J.L; Martínez, M.I; Martínez García, G; Martinez Pedreira, M; Masciocchi, S; Masera, M; Masoni, A; Massacrier, L; Masson, E; Mastroserio, A; Mathis, A.M; Matuoka, P.F.T; Matyja, A; Mayer, C; Mazzilli, M; Mazzoni, M.A; Meddi, F; Melikyan, Y; Menchaca-Rocha, A; Meninno, E; Meres, M; Mhlanga, S; Miake, Y; Micheletti, L; Mieskolainen, M.M; Mihaylov, D.L; Mikhaylov, K; Mischke, A; Mishra, A.N; Miśkowiec, D; Mitra, J; Mitu, C.M; Mohammadi, N; Mohanty, A.P; Mohanty, B; Mohisin Khan, M; Moreira De Godoy, D.A; Moreno, L.A.P; Moretto, S; Morreale, A; Morsch, A; Mrnjavac, T; Muccifora, V; Mudnic, E; Mühlheim, D; Muhuri, S; Mukherjee, M; Mulligan, J.D; Munhoz, M.G; Münning, K; Munzer, R.H; Murakami, H; Murray, S; Musa, L; Musinsky, J; Myers, C.J; Myrcha, J.W; Naik, B; Nair, R; Nandi, B.K; Nania, R; Nappi, E; Narayan, A; Naru, M.U; Nassirpour, A.F; Natal da Luz, H; Nattrass, C; Navarro, S.R; Nayak, K; Nayak, R; Nayak, T.K; Nazarenko, S; Negrao De Oliveira, R.A; Nellen, L; Nesbo, S.V; Neskovic, G; Ng, F; Nicassio, M; Niedziela, J; Nielsen, B.S; Nikolaev, S; Nikulin, S; Nikulin, V; Noferini, F; Nomokonov, P; Nooren, G; Noris, J.C.C; Norman, J; Nyanin, A; Nystrand, J; Ogino, M; Oh, H; Ohlson, A; Oleniacz, J; Oliveira Da Silva, A.C; Oliver, M.H; Onderwaater, J; Oppedisano, C; Orava, R; Oravec, M; Ortiz Velasquez, A; Oskarsson, A; Otwinowski, J; Oyama, K; Pachmayer, Y; Pacik, V; Pagano, D; Paić, G; Palni, P; Pan, J; Pandey, A.K; Panebianco, S; Papikyan, V; Pareek, P; Park, J; Parkkila, J.E; Parmar, S; Passfeld, A; Pathak, S.P; Patra, R.N; Paul, B; Pei, H; Peitzmann, T; Peng, X; Pereira, L.G; Pereira Da Costa, H; Peresunko, D; Perez Lezama, E; Peskov, V; Pestov, Y; Petráček, V; Petrovici, M; Petta, C; Pezzi, R.P; Piano, S; Pikna, M; Pillot, P; Pimentel, L.O.D.L; Pinazza, O; Pinsky, L; Pisano, S; Piyarathna, D.B; Płoskoń, M; Planinic, M; Pliquett, F; Pluta, J; Pochybova, S; Podesta-Lerma, P.L.M; Poghosyan, M.G; Polichtchouk, B; Poljak, N; Poonsawat, W; Pop, A; Poppenborg, H; Porteboeuf-Houssais, S; Pozdniakov, V; Prasad, S.K; Preghenella, R; Prino, F; Pruneau, C.A; Pshenichnov, I; Puccio, M; Punin, V; Puranapanda, K; Putschke, J; Raha, S; Rajput, S; Rak, J; Rakotozafindrabe, A; Ramello, L; Rami, F; Raniwala, R; Raniwala, S; Räsänen, S.S; Rascanu, B.T; Rath, R; Ratza, V; Ravasenga, I; Read, K.F; Redlich, K; Rehman, A; Reichelt, P; Reidt, F; Ren, X; Renfordt, R; Reshetin, A; Revol, J.-P; Reygers, K; Riabov, V; Richert, T; Richter, M; Riedler, P; Riegler, W; Riggi, F; Ristea, C; Rode, S.P; Rodríguez Cahuantzi, M; Røed, K; Rogalev, R; Rogochaya, E; Rohr, D; Röhrich, D; Rokita, P.S; Ronchetti, F; Rosas, E.D; Roslon, K; Rosnet, P; Rossi, A; Rotondi, A; Roukoutakis, F; Roy, C; Roy, P; Rueda, O.V; Rui, R; Rumyantsev, B; Rustamov, A; Ryabinkin, E; Ryabov, Y; Rybicki, A; Saarinen, S; Sadhu, S; Sadovsky, S; Šafařík, K; Saha, S.K; Sahoo, B; Sahoo, P; Sahoo, R; Sahoo, S; Sahu, P.K; Saini, J; Sakai, S; Saleh, M.A; Sambyal, S; Samsonov, V; Sandoval, A; Sarkar, A; Sarkar, D; Sarkar, N; Sarma, P; Sas, M.H.P; Scapparone, E; Scarlassara, F; Schaefer, B; Scheid, H.S; Schiaua, C; Schicker, R; Schmidt, C; Schmidt, H.R; Schmidt, M.O; Schmidt, M; Schmidt, N.V; Schukraft, J; Schutz, Y; Schwarz, K; Schweda, K; Scioli, G; Scomparin, E; Šefčík, M; Seger, J.E; Sekiguchi, Y; Sekihata, D; Selyuzhenkov, I; Senyukov, S; Serradilla, E; Sett, P; Sevcenco, A; Shabanov, A; Shabetai, A; Shahoyan, R; Shaikh, W; Shangaraev, A; Sharma, A; Sharma, M; Sharma, N; Sheikh, A.I; Shigaki, K; Shimomura, M; Shirinkin, S; Shou, Q; Sibiriak, Y; Siddhanta, S; Sielewicz, K.M; Siemiarczuk, T; Silvermyr, D; Simatovic, G; Simonetti, G; Singaraju, R; Singh, R; Singhal, V; Sinha, T; Sitar, B; Sitta, M; Skaali, T.B; Slupecki, M; Smirnov, N; Snellings, R.J.M; Snellman, T.W; Sochan, J; Soncco, C; Song, J; Songmoolnak, A; Soramel, F; Sorensen, S; Sozzi, F; Sputowska, I; Stachel, J; Stan, I; Stankus, P; Stenlund, E; Stocco, D; Storetvedt, M.M; Strmen, P; Suaide, A.A.P; Sugitate, T; Suire, C; Suleymanov, M; Suljic, M; Sultanov, R; Šumbera, M; Sumowidagdo, S; Suzuki, K; Swain, S; Szabo, A; Szarka, I; Tabassam, U; Takahashi, J; Tambave, G.J; Tanaka, N; Tarhini, M; Tarzila, M.G; Tauro, A; Tejeda Muñoz, G; Telesca, A; Terrevoli, C; Teyssier, B; Thakur, D; Thakur, S; Thomas, D; Thoresen, F; Tieulent, R; Tikhonov, A; Timmins, A.R; Toia, A; Topilskaya, N; Toppi, M; Torres, S.R; Tripathy, S; Trogolo, S; Trombetta, G; Tropp, L; Trubnikov, V; Trzaska, W.H; Trzcinski, T.P; Trzeciak, B.A; Tsuji, T; Tumkin, A; Turrisi, R; Tveter, T.S; Ullaland, K; Umaka, E.N; Uras, A; Usai, G.L; Utrobicic, A; Vala, M; Valencia Palomo, L; Valle, N; van der Kolk, N; van Doremalen, L.V.R; Van Hoorne, J.W; van Leeuwen, M; Vande Vyvre, P; Varga, D; Vargas, A; Vargyas, M; Varma, R; Vasileiou, M; Vasiliev, A; Vázquez Doce, O; Vechernin, V; Veen, A.M; Vercellin, E; Vergara Limón, S; Vermunt, L; Vernet, R; Vértesi, R; Vickovic, L; Viinikainen, J; Vilakazi, Z; Villalobos Baillie, O; Villatoro Tello, A; Vinogradov, A; Virgili, T; Vislavicius, V; Vodopyanov, A; Völkl, M.A; Voloshin, K; Voloshin, S.A; Volpe, G; von Haller, B; Vorobyev, I; Voscek, D; Vranic, D; Vrláková, J; Wagner, B; Wang, M; Watanabe, Y; Weber, M; Weber, S.G; Wegrzynek, A; Weiser, D.F; Wenzel, S.C; Wessels, J.P; Westerhoff, U; Whitehead, A.M; Wiechula, J; Wikne, J; Wilk, G; Wilkinson, J; Willems, G.A; Williams, M.C.S; Willsher, E; Windelband, B; Witt, W.E; Xu, R; Yalcin, S; Yamakawa, K; Yano, S; Yin, Z; Yokoyama, H; Yoo, I.-K; Yoon, J.H; Yuan, S; Yurchenko, V; Zaccolo, V; Zaman, A; Zampolli, C; Zanoli, H.J.C

We present the first measurements of femtoscopic correlations between the KS0 and K± particles in pp collisions at √s=7 TeV measured by the ALICE experiment. The observed femtoscopic correlations are consistent with final-state interactions proceeding solely via the a0(980) resonance. The extracted kaon source radius and correlation strength parameters for KS0K− are found to be equal within the experimental uncertainties to those for KS0K+. Results of the present study are compared with those from identical-kaon femtoscopic studies also performed with pp collisions at √s=7 TeV by ALICE and with a KS0K± measurement in Pb–Pb collisions at √sNN=2.76 TeV. Combined with the Pb–Pb results, our pp analysis is found to be compatible with the interpretation of the a0(980) having a tetraquark structure instead of that of a diquark. ; A.I. Alikhanyan National Science Laboratory (Yerevan Physics Institute) Foundation (ANSL), State Committee of Science and World Federation of Scientists (WFS), Armenia; Austrian Academy of Sciences and Nationalstiftung für Forschung, Technologie und Entwicklung, Austria; Ministry of Communications and High Technologies, National Nuclear Research Center, Azerbaijan; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Universidade Federal do Rio Grande do Sul (UFRGS), Financiadora de Estudos e Projetos (Finep) and Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP), Brazil; Ministry of Science & Technology of China (MSTC), National Natural Science Foundation of China (NSFC) and Ministry of Education of China (MOEC), China; Ministry of Science and Education, Croatia; Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN), Cubaenergía, Cuba; Ministry of Education, Youth and Sports of the Czech Republic, Czech Republic; The Danish Council for Independent Research Natural Sciences, the Carlsberg Foundation and Danish National Research Foundation (DNRF), Denmark; Helsinki Institute of Physics (HIP), Finland; Commissariat à l'Energie Atomique (CEA) and Institut National de Physique Nucléaire et de Physique des Particules (IN2P3) and Centre National de la Recherche Scientifique (CNRS), France; Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie (BMBF) and GSI Helmholtzzentrum für Schwerionenforschung GmbH, Germany; General Secretariat for Research and Technology, Ministry of Education, Research and Religions, Greece; National Research, Development and Innovation Office, Hungary; Department of Atomic Energy, Government of India (DAE), Department of Science and Technology, Government of India (DST), University Grants Commission, Government of India (UGC) and Council of Scientific and Industrial Research (CSIR), India; Indonesian Institute of Sciences, Indonesia; Centro Fermi – Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi and Istituto Nazionale di Fisica Nucleare (INFN), Italy; Institute for Innovative Science and Technology, Nagasaki Institute of Applied Science (IIST), Japan Society for the Promotion of Science (JSPS) KAKENHI and Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan; Consejo Nacional de Ciencia (CONACYT) y Tecnología, through Fondo de Cooperación Internacional en Ciencia y Tecnología (FONCICYT) and Dirección General de Asuntos del Personal Academico (DGAPA), Mexico; Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands; The Research Council of Norway, Norway; Commission on Science and Technology for Sustainable Development in the South (COMSATS), Pakistan; Pontificia Universidad Católica del Perú, Peru; Ministry of Science and Higher Education and National Science Centre, Poland; Korea Institute of Science and Technology Information and National Research Foundation of Korea (NRF), Republic of Korea; Ministry of Education and Scientific Research, Institute of Atomic Physics and Romanian National Agency for Science, Technology and Innovation, Romania; Joint Institute for Nuclear Research (JINR), Ministry of Education and Science of the Russian Federation and National Research Centre Kurchatov Institute, Russia; Ministry of Education, Science, Research and Sport of the Slovak Republic, Slovakia; National Research Foundation of South Africa, South Africa; Swedish Research Council (VR) and Knut & Alice Wallenberg Foundation (KAW), Sweden; European Organization for Nuclear Research, Switzerland; National Science and Technology Development Agency (NSDTA), Suranaree University of Technology (SUT) and Office of the Higher Education Commission under NRU project of Thailand, Thailand; Turkish Atomic Energy Agency (TAEK), Turkey; National Academy of Sciences of Ukraine, Ukraine; Science and Technology Facilities Council (STFC), United Kingdom; National Science Foundation of the United States of America (NSF) and United States Department of Energy, Office of Nuclear Physics (DOE NP), United States of America.

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Open Access#22020

Multiplicity dependence of J/ψ production at midrapidity in pp collisions at √s = 13 TeV

Acharya, S; Adamová, D; Adler, A; Adolfsson, J; Aggarwal, M.M; Aglieri Rinella, G; Agnello, M; Agrawal, N

Acharya, S; Adamová, D; Adler, A; Adolfsson, J; Aggarwal, M.M; Aglieri Rinella, G; Agnello, M; Agrawal, N; Ahammed, Z; Ahmad, S; Ahn, S.U; Akbar, Z; Akindinov, A; Al-Turany, M; Alam, S.N; Albuquerque, D.S.D; Aleksandrov, D; Alessandro, B; Alfanda, H.M; Alfaro Molina, R; Ali, B; Ali, Y; Alici, A; Alizadehvandchali, N; Alkin, A; Alme, J; Alt, T; Altenkamper, L; Altsybeev, I; Anaam, M.N; Andrei, C; Andreou, D; Andronic, A; Angeletti, M; Anguelov, V; Anson, C; Antičić, T; Antinori, F; Antonioli, P; Apadula, N; Aphecetche, L; Appelshäuser, H; Arcelli, S; Arnaldi, R; Arratia, M; Arsene, I.C; Arslandok, M; Augustinus, A; Averbeck, R; Aziz, S; Azmi, M.D; Badalà, A; Baek, Y.W; Bagnasco, S; Bai, X; Bailhache, R; Bala, R; Balbino, A; Baldisseri, A; Ball, M; Balouza, S; Banerjee, D; Barbera, R; Barioglio, L; Barnaföldi, G.G; Barnby, L.S; Barret, V; Bartalini, P; Bartels, C; Barth, K; Bartsch, E; Baruffaldi, F; Bastid, N; Basu, S; Batigne, G; Batyunya, B; Bauri, D; Bazo Alba, J.L; Bearden, I.G; Beattie, C; 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Measurements of the inclusive J/ψ yield as a function of charged-particle pseudorapidity density dNch/dη in pp collisions at √s = 13 TeV with ALICE at the LHC are reported. The J/ψ meson yield is measured at midrapidity (|y|<0.9) in the dielectron channel, for events selected based on the charged-particle multiplicity at midrapidity (|η|<1) and at forward rapidity ( -3.7 < η < -1.7 and 2.8 < η < 5.1); both observables are normalized to their corresponding averages in minimum bias events. The increase of the normalized J/ψ yield with normalized dNch/dη is significantly stronger than linear and dependent on the transverse momentum. The data are compared to theoretical predictions, which describe the observed trends well, albeit not always quantitatively. ; A.I. Alikhanyan National Science Laboratory (Yerevan Physics Institute) Foundation (ANSL), State Committee of Science and World Federation of Scientists (WFS), Armenia; Austrian Academy of Sciences, Austrian Science Fund (FWF): [M 2467-N36] and Nationalstiftung für Forschung, Technologie und Entwicklung, Austria; Ministry of Communications and High Technologies, National Nuclear Research Center, Azerbaijan; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Financiadora de Estudos e Projetos (Finep), Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) and Universidade Federal do Rio Grande do Sul (UFRGS), Brazil; Ministry of Education of China (MOEC), Ministry of Science & Technology of China (MSTC) and National Natural Science Foundation of China (NSFC), China; Ministry of Science and Education and Croatian Science Foundation, Croatia; Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN), Cubaenergía, Cuba; The Ministry of Education, Youth and Sports of the Czech Republic, Czech Republic; Danish Council for Independent Research Natural Sciences, the Villum Fonden and Danish National Research Foundation (DNRF), Denmark; Helsinki Institute of Physics (HIP), Finland; Commissariat à l'Énergie Atomique (CEA) and Institut National de Physique Nucléaire et de Physique des Particules (IN2P3) and Centre National de la Recherche Scientifique (CNRS), France; Bundesministerium für Bildung und Forschung (BMBF) and GSI Helmholtzzentrum für Schwerionenforschung GmbH, Germany; General Secretariat for Research and Technology, Ministry of Education, Research and Religions, Greece; National Research Development and Innovation Office, Hungary; Department of Atomic Energy, Government of India (DAE), Department of Science and Technology, Government of India (DST), University Grants Commission, Government of India (UGC) and Council of Scientific and Industrial Research (CSIR), India; Indonesian Institute of Science, Indonesia; Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi and Istituto Nazionale di Fisica Nucleare (INFN), Italy; Institute for Innovative Science and Technology, Nagasaki Institute of Applied Science (IIST), Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) and Japan Society for the Promotion of Science (JSPS) KAKENHI, Japan; Consejo Nacional de Ciencia (CONACYT) y Tecnología, through Fondo de Cooperación Internacional en Ciencia y Tecnología (FONCICYT) and Dirección General de Asuntos del Personal Academico (DGAPA, UNAM), Mexico; Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands; The Research Council of Norway, Norway; Commission on Science and Technology for Sustainable Development in the South (COMSATS), Pakistan; Pontificia Universidad Católica del Perú, Peru; Ministry of Science and Higher Education, National Science Centre and WUT ID-UB, Poland; Korea Institute of Science and Technology Information and National Research Foundation of Korea (NRF), Republic of Korea; Ministry of Education and Scientific Research, Institute of Atomic Physics and Ministry of Research and Innovation and Institute of Atomic Physics, Romania; Joint Institute for Nuclear Research (JINR), Ministry of Education and Science of the Russian Federation, National Research Center "Kurchatov Institute", Russian Science Foundation and Russian Foundation for Basic Research, Russia; Ministry of Education, Science, Research and Sport of the Slovak Republic, Slovakia; National Research Foundation of South Africa, South Africa; Swedish Research Council (VR) and Knut & Alice Wallenberg Foundation (KAW), Sweden; European Organization for Nuclear Research, Switzerland; Suranaree University of Technology (SUT), National Science and Technology Development Agency (NSDTA) and Office of the Higher Education Commission under NRU project of Thailand, Thailand; Turkish Atomic Energy Agency (TAEK), Turkey; National Academy of Sciences of Ukraine, Ukraine; Science and Technology Facilities Council (STFC), United Kingdom; National Science Foundation of the United States of America (NSF) and United States Department of Energy, Office of Nuclear Physics (DOE NP), United States of America.

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Open Access#32020

Search for a common baryon source in high-multiplicity pp collisions at the LHC

Acharya, S; Adamová, D; Adler, A; Adolfsson, J; Aggarwal, M.M; Aglieri Rinella, G; Agnello, M; Agrawal, N

Acharya, S; Adamová, D; Adler, A; Adolfsson, J; Aggarwal, M.M; Aglieri Rinella, G; Agnello, M; Agrawal, N; Ahammed, Z; Ahmad, S; Ahn, S.U; Akbar, Z; Akindinov, A; Al-Turany, M; Alam, S.N; Albuquerque, D.S.D; Aleksandrov, D; Alessandro, B; Alfanda, H.M; Alfaro Molina, R; Ali, B; Ali, Y; Alici, A; Alkin, A; Alme, J; Alt, T; Altenkamper, L; Altsybeev, I; Anaam, M.N; Andrei, C; Andreou, D; Andrews, H.A; Andronic, A; Angeletti, M; Anguelov, V; Anson, C; Antičić, T; Antinori, F; Antonioli, P; Apadula, N; Aphecetche, L; Appelshäuser, H; Arcelli, S; Arnaldi, R; Arratia, M; Arsene, I.C; Arslandok, M; Augustinus, A; Averbeck, R; Aziz, S; Azmi, M.D; Badalà, A; Baek, Y.W; Bagnasco, S; Bai, X; Bailhache, R; Bala, R; Balbino, A; Baldisseri, A; Ball, M; Balouza, S; Banerjee, D; Barbera, R; Barioglio, L; Barnaföldi, G.G; Barnby, L.S; Barret, V; Bartalini, P; Barth, K; Bartsch, E; Baruffaldi, F; Bastid, N; Basu, S; Batigne, G; Batyunya, B; Bauri, D; Bazo Alba, J.L; Bearden, I.G; Beattie, C; Bedda, C; Behera, N.K; 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We report on the measurement of the size of the particle-emitting source from two-baryon correlations with ALICE in high-multiplicity pp collisions at √s = 13 TeV. The source radius is studied with low relative momentum p–p, pbar-pbar, p–Λ , and pbar-Λbar pairs as a function of the pair transverse mass m_T considering for the first time in a quantitative way the effect of strong resonance decays. After correcting for this effect, the radii extracted for pairs of different particle species agree. This indicates that protons, antiprotons, Λ s, and Λbar s originate from the same source. Within the measured m_T range (1.1–2.2) GeV/c^2 the invariant radius of this common source varies between 1.3 and 0.85 fm. These results provide a precise reference for studies of the strong hadron–hadron interactions and for the investigation of collective properties in small colliding systems. ; A. I. Alikhanyan National Science Laboratory (Yerevan Physics Institute) Foundation (ANSL), State Committee of Science and World Federation of Scientists (WFS), Armenia; Austrian Academy of Sciences, Austrian Science Fund (FWF): [M 2467-N36] and Nationalstiftung für Forschung, Technologie und Entwicklung, Austria; Ministry of Communications and High Technologies, National Nuclear Research Center, Azerbaijan; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Financiadora de Estudos e Projetos (Finep), Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) and Universidade Federal do Rio Grande do Sul (UFRGS), Brazil; Ministry of Education of China (MOEC), Ministry of Science & Technology of China (MSTC) and National Natural Science Foundation of China (NSFC), China; Ministry of Science and Education and Croatian Science Foundation, Croatia; Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN), Cubaenergía, Cuba; Ministry of Education, Youth and Sports of the Czech Republic, Czech Republic; The Danish Council for Independent Research | Natural Sciences, the Villum Fonden and Danish National Research Foundation (DNRF), Denmark; Helsinki Institute of Physics (HIP), Finland; Commissariat à l'Énergie Atomique (CEA) and Institut National de Physique Nucléaire et de Physique des Particules (IN2P3) and Centre National de la Recherche Scientifique (CNRS), France; Bundesministerium für Bildung und Forschung (BMBF) and GSI Helmholtzzentrum für Schwerionenforschung GmbH, Germany; General Secretariat for Research and Technology, Ministry of Education, Research and Religions, Greece; National Research Development and Innovation Office, Hungary; Department of Atomic Energy, Government of India (DAE), Department of Science and Technology, Government of India (DST), University Grants Commission, Government of India (UGC) and Council of Scientific and Industrial Research, India (CSIR), India; Indonesian Institute of Science, Indonesia; Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi and Istituto Nazionale di Fisica Nucleare (INFN), Italy; Institute for Innovative Science and Technology, Nagasaki Institute of Applied Science (IIST), Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) and Japan Society for the Promotion of Science (JSPS) KAKENHI, Japan; Consejo Nacional de Ciencia (CONACYT) y Tecnología, through Fondo de Cooperación Internacional en Ciencia y Tecnología (FONCICYT) and Dirección General de Asuntos del Personal Academico (DGAPA), Mexico; Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands; The Research Council of Norway, Norway; Commission on Science and Technology for Sustainable Development in the South (COMSATS), Pakistan; Pontificia Universidad Católica del Perú, Peru; Ministry of Science and Higher Education, National Science Centre and WUT ID-UB, Poland; Korea Institute of Science and Technology Information and National Research Foundation of Korea (NRF), Republic of Korea; Ministry of Education and Scientific Research, Institute of Atomic Physics and Ministry of Research and Innovation and Institute of Atomic Physics, Romania; Joint Institute for Nuclear Research (JINR), Ministry of Education and Science of the Russian Federation, National Research Centre Kurchatov Institute, Russian Science Foundation and Russian Foundation for Basic Research, Russia; Ministry of Education, Science, Research and Sport of the Slovak Republic, Slovakia; National Research Foundation of South Africa, South Africa; Swedish Research Council (VR) and Knut and Alice Wallenberg Foundation (KAW), Sweden; European Organization for Nuclear Research, Switzerland; Suranaree University of Technology (SUT), National Science and Technology Development Agency (NSDTA) and Office of the Higher Education Commission under NRU project of Thailand, Thailand; Turkish Atomic Energy Agency (TAEK), Turkey; National Academy of Sciences of Ukraine, Ukraine; Science and Technology Facilities Council (STFC), United Kingdom; National Science Foundation of the United States of America (NSF) and United States Department of Energy, Office of Nuclear Physics (DOE NP), United States of America

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Open Access#42020

Transverse-momentum and event-shape dependence of D-meson flow harmonics in Pb–Pb collisions at √sNN = 5.02 TeV

Acharya, S; Adamová, D; Adler, A; Adolfsson, J; Aggarwal, M.M; Aglieri Rinella, G; Agnello, M; Agrawal, N

Acharya, S; Adamová, D; Adler, A; Adolfsson, J; Aggarwal, M.M; Aglieri Rinella, G; Agnello, M; Agrawal, N; Ahammed, Z; Ahmad, S; Ahn, S.U; Akbar, Z; Akindinov, A; Al-Turany, M; Alam, S.N; Albuquerque, D.S.D; Aleksandrov, D; Alessandro, B; Alfanda, H.M; Alfaro Molina, R; Ali, B; Ali, Y; Alici, A; Alizadehvandchali, N; Alkin, A; Alme, J; Alt, T; Altenkamper, L; Altsybeev, I; Anaam, M.N; Andrei, C; Andreou, D; Andronic, A; Angeletti, M; Anguelov, V; Anson, C; Antičić, T; Antinori, F; Antonioli, P; Apadula, N; Aphecetche, L; Appelshäuser, H; Arcelli, S; Arnaldi, R; Arratia, M; Arsene, I.C; Arslandok, M; Augustinus, A; Averbeck, R; Aziz, S; Azmi, M.D; Badalà, A; Baek, Y.W; Bagnasco, S; Bai, X; Bailhache, R; Bala, R; Balbino, A; Baldisseri, A; Ball, M; Balouza, S; Banerjee, D; Barbera, R; Barioglio, L; Barnaföldi, G.G; Barnby, L.S; Barret, V; Bartalini, P; Bartels, C; Barth, K; Bartsch, E; Baruffaldi, F; Bastid, N; Basu, S; Batigne, G; Batyunya, B; Bauri, D; Bazo Alba, J.L; Bearden, I.G; Beattie, C; Bedda, C; Behera, N.K; Belikov, I; Bell Hechavarria, A.D.C; Bellini, F; Bellwied, R; Belyaev, V; Bencedi, G; Beole, S; Bercuci, A; Berdnikov, Y; Berenyi, D; Bertens, R.A; Berzano, D; Besoiu, M.G; Betev, L; Bhasin, A; Bhat, I.R; Bhat, M.A; Bhatt, H; Bhattacharjee, B; Bianchi, A; Bianchi, L; Bianchi, N; Bielčík, J; Bielčíková, J; Bilandzic, A; Biro, G; Biswas, R; Biswas, S; Blair, J.T; Blau, D; Blume, C; Boca, G; Bock, F; Bogdanov, A; Boi, S; Bok, J; Boldizsár, L; Bolozdynya, A; Bombara, M; Bonomi, G; Borel, H; Borissov, A; Bossi, H; Botta, E; Bratrud, L; Braun-Munzinger, P; Bregant, M; Broz, M; Bruna, E; Bruno, G.E; Buckland, M.D; Budnikov, D; Buesching, H; Bufalino, S; Bugnon, O; Buhler, P; Buncic, P; Buthelezi, Z; Butt, J.B; Bysiak, S.A; Caffarri, D; Caliva, A; Calvo Villar, E; Camacho, J.M.M; Camacho, R.S; Camerini, P; Canedo, F.D.M; Capon, A.A; Carnesecchi, F; Caron, R; Castillo Castellanos, J; Castro, A.J; Casula, E.A.R; Catalano, F; Ceballos Sanchez, C; Chakraborty, P; Chandra, S; Chang, W; Chapeland, S; Chartier, M; Chattopadhyay, S; Chauvin, A; Cheshkov, C; Cheynis, B; Chibante Barroso, V; Chinellato, D.D; Cho, S; Chochula, P; Chowdhury, T; Christakoglou, P; Christensen, C.H; Christiansen, P; Chujo, T; Cicalo, C; Cifarelli, L; Cilladi, L.D; Cindolo, F; Ciupek, M.R; Clai, G; Cleymans, J; Colamaria, F; Colella, D; Collu, A; Colocci, M; Concas, M; Conesa Balbastre, G; Conesa del Valle, Z; Contin, G; Contreras, J.G; Cormier, T.M; Corrales Morales, Y; Cortese, P; Cosentino, M.R; Costa, F; Costanza, S; Crochet, P; Cuautle, E; Cui, P; Cunqueiro, L; Dabrowski, D; Dahms, T; Dainese, A; Damas, F.P.A; Danisch, M.C; Danu, A; Das, D; Das, I; Das, P; Das, S; Dash, A; Dash, S; De, S; De Caro, A; de Cataldo, G; de Cuveland, J; De Falco, A; De Gruttola, D; De Marco, N; De Pasquale, S; Deb, S; Degenhardt, H.F; Deja, K.R; Deloff, A; Delsanto, S; Deng, W; Dhankher, P; Di Bari, D; Di Mauro, A; Diaz, R.A; Dietel, T; Dillenseger, P; Ding, Y; Divià, R; Dixit, D.U; Djuvsland, Ø; Dmitrieva, U; Dobrin, A; Dönigus, B; Dordic, O; Dubey, A.K; Dubla, A; Dudi, S; Dukhishyam, M; Dupieux, P; Ehlers, R.J; Eikeland, V.N; Elia, D; Erazmus, B; Erhardt, F; Erokhin, A; Ersdal, M.R; Espagnon, B; Eulisse, G; Evans, D; Evdokimov, S; Fabbietti, L; Faggin, M; Faivre, J; Fan, F; Fantoni, A; Fasel, M; Fecchio, P; Feliciello, A; Feofilov, G; Fernández Téllez, A; Ferrero, A; Ferretti, A; Festanti, A; Feuillard, V.J.G; Figiel, J; Filchagin, S; Finogeev, D; Fionda, F.M; Fiorenza, G; Flor, F; Flores, A.N; Foertsch, S; Foka, P; Fokin, S; Fragiacomo, E; Frankenfeld, U; Fuchs, U; Furget, C; Furs, A; Fusco Girard, M; Gaardhøje, J.J; Gagliardi, M; Gago, A.M; Gal, A; Galvan, C.D; Ganoti, P; Garabatos, C; Garcia, J.R.A; Garcia-Solis, E; Garg, K; Gargiulo, C; Garibli, A; Garner, K; Gasik, P; Gauger, E.F; Gay Ducati, M.B; Germain, M; Ghosh, J; Ghosh, P; Ghosh, S.K; Giacalone, M; Gianotti, P; Giubellino, P; Giubilato, P; Glaenzer, A.M.C; Glässel, P; Gomez Ramirez, A; Gonzalez, V; González-Trueba, L.H; Gorbunov, S; Görlich, L; Goswami, A; Gotovac, S; Grabski, V; Graczykowski, L.K; Graham, K.L; Greiner, L; Grelli, A; Grigoras, C; Grigoriev, V; Grigoryan, A; Grigoryan, S; Groettvik, O.S; Grosa, F; Grosse-Oetringhaus, J.F; Grosso, R; Guernane, R; Guittiere, M; Gulbrandsen, K; Gunji, T; Gupta, A; Gupta, R; Guzman, I.B; Haake, R; Habib, M.K; Hadjidakis, C; Hamagaki, H; Hamar, G; Hamid, M; Hannigan, R; Haque, M.R; Harlenderova, A; Harris, J.W; Harton, A; Hasenbichler, J.A; Hassan, H; Hassan, Q.U; Hatzifotiadou, D; Hauer, P; Havener, L.B; Hayashi, S; Heckel, S.T; Hellbär, E; Helstrup, H; Herghelegiu, A; Herman, T; Hernandez, E.G; Herrera Corral, G; Herrmann, F; Hetland, K.F; Hillemanns, H; Hills, C; Hippolyte, B; Hohlweger, B; Honermann, J; Horak, D; Hornung, A; Hornung, S; Hosokawa, R; Hristov, P; Huang, C; Hughes, C; Huhn, P; Humanic, T.J; Hushnud, H; Husova, L.A; Hussain, N; Hussain, S.A; Hutter, D; Iddon, J.P; Ilkaev, R; Ilyas, H; Inaba, M; Innocenti, G.M; Ippolitov, M; Isakov, A; Islam, M.S; Ivanov, M; 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The elliptic and triangular flow coefficients v2 and v3 of prompt D0, D+, and D*+ mesons were measured at midrapidity (|y|<0.8) in Pb–Pb collisions at the centre-of-mass energy per nucleon pair of √sNN = 5.02 TeV with the ALICE detector at the LHC. The D mesons were reconstructed via their hadronic decays in the transverse momentum interval 1

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Open Access#52020

Pion–kaon femtoscopy and the lifetime of the hadronic phase in Pb−Pb collisions at √sNN = 2.76 TeV

Acharya, S; Adamová, D; Adler, A; Adolfsson, J; Aggarwal, M.M; Agha, S; Aglieri Rinella, G; Agnello, M

Acharya, S; Adamová, D; Adler, A; Adolfsson, J; Aggarwal, M.M; Agha, S; Aglieri Rinella, G; Agnello, M; Agrawal, N; Ahammed, Z; Ahmad, S; Ahn, S.U; Akbar, Z; Akindinov, A; Al-Turany, M; Alam, S.N; Albuquerque, D.S.D; Aleksandrov, D; Alessandro, B; Alfanda, H.M; Alfaro Molina, R; Ali, B; Ali, Y; Alici, A; Alizadehvandchali, N; Alkin, A; Alme, J; Alt, T; Altenkamper, L; Altsybeev, I; Anaam, M.N; Andrei, C; Andreou, D; Andronic, A; Angeletti, M; Anguelov, V; Antičić, T; Antinori, F; Antonioli, P; Apadula, N; Aphecetche, L; Appelshäuser, H; Arcelli, S; Arnaldi, R; Arratia, M; Arsene, I.C; Arslandok, M; Augustinus, A; Averbeck, R; Aziz, S; Azmi, M.D; Badalà, A; Baek, Y.W; Bagnasco, S; Bai, X; Bailhache, R; Bala, R; Balbino, A; Baldisseri, A; Ball, M; Balouza, S; Banerjee, D; Barbera, R; Barioglio, L; Barnaföldi, G.G; Barnby, L.S; Barret, V; Bartalini, P; Bartels, C; Barth, K; Bartsch, E; Baruffaldi, F; Bastid, N; Basu, S; Batigne, G; Batyunya, B; Bauri, D; Bazo Alba, J.L; Bearden, I.G; Beattie, C; Bedda, C; Belikov, I; Bell Hechavarria, A.D.C; Bellini, F; Bellwied, R; Belyaev, V; Bencedi, G; Beole, S; Bercuci, A; Berdnikov, Y; Berenyi, D; Bertens, R.A; Berzano, D; Besoiu, M.G; Betev, L; Bhasin, A; Bhat, I.R; Bhat, M.A; Bhatt, H; Bhattacharjee, B; Bianchi, A; Bianchi, L; Bianchi, N; Bielčík, J; Bielčíková, J; Bilandzic, A; Biro, G; Biswas, R; Biswas, S; Blair, J.T; Blau, D; Blume, C; Boca, G; Bock, F; Bogdanov, A; Boi, S; Bok, J; Boldizsár, L; Bolozdynya, A; Bombara, M; Bonomi, G; Borel, H; Borissov, A; Bossi, H; Botta, E; Bratrud, L; Braun-Munzinger, P; Bregant, M; Broz, M; Bruna, E; Bruno, G.E; Buckland, M.D; Budnikov, D; Buesching, H; Bufalino, S; Bugnon, O; Buhler, P; Buncic, P; Buthelezi, Z; Butt, J.B; Bysiak, S.A; Caffarri, D; Caliva, A; Calvo Villar, E; Camacho, J.M.M; Camacho, R.S; Camerini, P; Canedo, F.D.M; Capon, A.A; Carnesecchi, F; Caron, R; Castillo Castellanos, J; Castro, A.J; Casula, E.A.R; Catalano, F; Ceballos Sanchez, C; Chakraborty, P; Chandra, S; Chang, W; Chapeland, S; Chartier, M; Chattopadhyay, S; Chauvin, A; Cheshkov, C; Cheynis, B; Chibante Barroso, V; Chinellato, D.D; Cho, S; Chochula, P; Chowdhury, T; Christakoglou, P; Christensen, C.H; Christiansen, P; Chujo, T; Cicalo, C; Cifarelli, L; Cindolo, F; Ciupek, M.R; Clai, G; Cleymans, J; Colamaria, F; Colburn, J.S; Colella, D; Collu, A; Colocci, M; Concas, M; Conesa Balbastre, G; Conesa del Valle, Z; Contin, G; Contreras, J.G; Cormier, T.M; Corrales Morales, Y; Cortese, P; Cosentino, M.R; Costa, F; Costanza, S; Crochet, P; Cuautle, E; Cui, P; Cunqueiro, L; Dabrowski, D; Dahms, T; Dainese, A; Damas, F.P.A; Danisch, M.C; Danu, A; Das, D; Das, I; Das, P; Das, S; Dash, A; Dash, S; De, S; De Caro, A; de Cataldo, G; De Cilladi, L; de Cuveland, J; De Falco, A; De Gruttola, D; De Marco, N; De Martin, C; De Pasquale, S; Deb, S; Degenhardt, H.F; Deja, K.R; Deloff, A; Delsanto, S; Deng, W; Dhankher, P; Di Bari, D; Di Mauro, A; Diaz, R.A; Dietel, T; Dillenseger, P; Ding, Y; Divià, R; Dixit, D.U; Djuvsland, Ø; 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In this paper, the first femtoscopic analysis of pion–kaon correlations at the LHC is reported. The analysis was performed on the Pb–Pb collision data at √sNN = 2.76 TeV recorded with the ALICE detector. The non-identical particle correlations probe the spatio-temporal separation between sources of different particle species as well as the average source size of the emitting system. The sizes of the pion and kaon sources increase with centrality, and pions are emitted closer to the centre of the system and/or later than kaons. This is naturally expected in a system with strong radial flow and is qualitatively reproduced by hydrodynamic models. ALICE data on pion–kaon emission asymmetry are consistent with (3+1)-dimensional viscous hydrodynamics coupled to a statistical hadronisation model, resonance propagation, and decay code THERMINATOR 2 calculation, with an additional time delay between 1 and 2 fm/c for kaons. The delay can be interpreted as evidence for a significant hadronic rescattering phase in heavy-ion collisions at the LHC. ; A. I. Alikhanyan National Science Laboratory (Yerevan Physics Institute) Foundation (ANSL), State Committee of Science and World Federation of Scientists (WFS), Armenia; Austrian Academy of Sciences, Austrian Science Fund (FWF): [M 2467-N36] and Nationalstiftung für Forschung, Technologie und Entwicklung, Austria; Ministry of Communications and High Technologies, National Nuclear Research Center, Azerbaijan; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Financiadora de Estudos e Projetos (Finep), Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) and Universidade Federal do Rio Grande do Sul (UFRGS), Brazil; Ministry of Education of China (MOEC), Ministry of Science & Technology of China (MSTC) and National Natural Science Foundation of China (NSFC), China; Ministry of Science and Education and Croatian Science Foundation, Croatia; Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN), Cubaenergía, Cuba; The Ministry of Education, Youth and Sports of the Czech Republic, Czech Republic; The Danish Council for Independent Research Natural Sciences, the Villum Fonden and Danish National Research Foundation (DNRF), Denmark; Helsinki Institute of Physics (HIP), Finland; Commissariat à l'Énergie Atomique (CEA) and Institut National de Physique Nucléaire et de Physique des Particules (IN2P3) and Centre National de la Recherche Scientifique (CNRS), France; Bundesministerium für Bildung und Forschung (BMBF) and GSI Helmholtzzentrum für Schwerionenforschung GmbH, Germany; General Secretariat for Research and Technology, Ministry of Education, Research and Religions, Greece; National Research Development and Innovation Office, Hungary; Department of Atomic Energy, Government of India (DAE), Department of Science and Technology, Government of India (DST), University Grants Commission, Government of India (UGC) and Council of Scientific and Industrial Research (CSIR), India; Indonesian Institute of Sciences, Indonesia; Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi and Istituto Nazionale di Fisica Nucleare (INFN), Italy; Institute for Innovative Science and Technology, Nagasaki Institute of Applied Science (IIST), Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) and Japan Society for the Promotion of Science (JSPS) KAKENHI, Japan; Consejo Nacional de Ciencia y Tecnología (CONACYT), through Fondo de Cooperación Internacional en Ciencia y Tecnología (FONCICYT) and Dirección General de Asuntos del Personal Academico (DGAPA), Mexico; Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands; The Research Council of Norway, Norway; Commission on Science and Technology for Sustainable Development in the South (COMSATS), Pakistan; Pontificia Universidad Católica del Perú, Peru; Ministry of Science and Higher Education, National Science Centre and WUT ID-UB, Poland; Korea Institute of Science and Technology Information and National Research Foundation of Korea (NRF), Republic of Korea; Ministry of Education and Scientific Research, Institute of Atomic Physics and Ministry of Research and Innovation and Institute of Atomic Physics, Romania; Joint Institute for Nuclear Research (JINR), Ministry of Education and Science of the Russian Federation, National Research Centre Kurchatov Institute, Russian Science Foundation and Russian Foundation for Basic Research, Russia; Ministry of Education, Science, Research and Sport of the Slovak Republic, Slovakia; National Research Foundation of South Africa, South Africa; Swedish Research Council (VR) and Knut & Alice Wallenberg Foundation (KAW), Sweden; European Organization for Nuclear Research, Switzerland; Suranaree University of Technology (SUT), National Science and Technology Development Agency (NSDTA) and Office of the Higher Education Commission under NRU project of Thailand, Thailand; Turkish Atomic Energy Agency (TAEK), Turkey; National Academy of Sciences of Ukraine, Ukraine; Science and Technology Facilities Council (STFC), United Kingdom; National Science Foundation of the United States of America (NSF) and United States Department of Energy, Office of Nuclear Physics (DOE NP), United States of America.

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Open Access#62021

Centrality dependence of J/ψ and ψ(2S) production and nuclear modification in p-Pb collisions at √sNN = 8.16 TeV

Acharya, S; Adamová, D; Adler, A; Adolfsson, J; Aggarwal, M. M; Agha, S; Aglieri Rinella, G; Agnello, M

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The inclusive production of the J/ψ and ψ(2S) charmonium states is studied as a function of centrality in p-Pb collisions at a centre-of-mass energy per nucleon pair √sNN = 8.16 TeV at the LHC. The measurement is performed in the dimuon decay channel with the ALICE apparatus in the centre-of-mass rapidity intervals −4.46 < ycms < −2.96 (Pb-going direction) and 2.03 < ycms < 3.53 (p-going direction), down to zero transverse momentum (pT). The J/ψ and ψ(2S) production cross sections are evaluated as a function of the collision centrality, estimated through the energy deposited in the zero degree calorimeter located in the Pb-going direction. The pT-differential J/ψ production cross section is measured at backward and forward rapidity for several centrality classes, together with the corresponding average ⟨pT⟩ and ⟨pT^2⟩ values. The nuclear effects affecting the production of both charmonium states are studied using the nuclear modification factor. In the p-going direction, a suppression of the production of both charmonium states is observed, which seems to increase from peripheral to central collisions. In the Pb-going direction, however, the centrality dependence is different for the two states: the nuclear modification factor of the J/ψ increases from below unity in peripheral collisions to above unity in central collisions, while for the ψ(2S) it stays below or consistent with unity for all centralities with no significant centrality dependence. The results are compared with measurements in p-Pb collisions at √sNN = 5.02 TeV and no significant dependence on the energy of the collision is observed. Finally, the results are compared with theoretical models implementing various nuclear matter effects. ; A.I. Alikhanyan National Science Laboratory (Yerevan Physics Insti- tute) Foundation (ANSL), State Committee of Science and World Federation of Scientists (WFS), Armenia; Austrian Academy of Sciences, Austrian Science Fund (FWF): [M 2467- N36] and Nationalstiftung für Forschung, Technologie und Entwicklung, Austria; Ministry of Communications and High Technologies, National Nuclear Research Center, Azerbaijan; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Financiadora de Estudos e Projetos (Finep), Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) and Universidade Federal do Rio Grande do Sul (UFRGS), Brazil; Ministry of Education of China (MOEC), Ministry of Science & Technology of China (MSTC) and National Natural Science Foundation of China (NSFC), China; Ministry of Science and Education and Croatian Science Foundation, Croatia; Centro de Aplicaciones Tecnológi- cas y Desarrollo Nuclear (CEADEN), Cubaenergía, Cuba; Ministry of Education, Youth and Sports of the Czech Republic, Czech Republic; The Danish Council for Independent Research | Natural Sciences, the VILLUM FONDEN and Danish National Research Foun- dation (DNRF), Denmark; Helsinki Institute of Physics (HIP), Finland; Commissariat à l'Energie Atomique (CEA) and Institut National de Physique Nucléaire et de Physique des Particules (IN2P3) and Centre National de la Recherche Scientifique (CNRS), France; Bundesministerium für Bildung und Forschung (BMBF) and GSI Helmholtzzentrum für Schwerionenforschung GmbH, Germany; General Secretariat for Research and Technol- ogy, Ministry of Education, Research and Religions, Greece; National Research, Develop- ment and Innovation Office, Hungary; Department of Atomic Energy Government of India (DAE), Department of Science and Technology, Government of India (DST), University Grants Commission, Government of India (UGC) and Council of Scientific and Industrial Research (CSIR), India; Indonesian Institute of Science, Indonesia; Centro Fermi — MuseoStorico della Fisica e Centro Studi e Ricerche Enrico Fermi and Istituto Nazionale di Fisica Nucleare (INFN), Italy; Institute for Innovative Science and Technology, Nagasaki Insti- tute of Applied Science (IIST), Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) and Japan Society for the Promotion of Science (JSPS) KAK- ENHI, Japan; Consejo Nacional de Ciencia (CONACYT) y Tecnología, through Fondo de Cooperación Internacional en Ciencia y Tecnología (FONCICYT) and Dirección Gen- eral de Asuntos del Personal Academico (DGAPA), Mexico; Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands; The Research Council of Norway, Nor- way; Commission on Science and Technology for Sustainable Development in the South (COMSATS), Pakistan; Pontificia Universidad Católica del Perú, Peru; Ministry of Sci- ence and Higher Education, National Science Centre and WUT ID-UB, Poland; Korea Institute of Science and Technology Information and National Research Foundation of Ko- rea (NRF), Republic of Korea; Ministry of Education and Scientific Research, Institute of Atomic Physics and Ministry of Research and Innovation and Institute of Atomic Physics, Romania; Joint Institute for Nuclear Research (JINR), Ministry of Education and Science of the Russian Federation, National Research Centre Kurchatov Institute, Russian Science Foundation and Russian Foundation for Basic Research, Russia; Ministry of Education, Science, Research and Sport of the Slovak Republic, Slovakia; National Research Foun- dation of South Africa, South Africa; Swedish Research Council (VR) and Knut & Alice Wallenberg Foundation (KAW), Sweden; European Organization for Nuclear Research, Switzerland; Suranaree University of Technology (SUT), National Science and Technology Development Agency (NSDTA) and Office of the Higher Education Commission under NRU project of Thailand, Thailand; Turkish Atomic Energy Agency (TAEK), Turkey; Na- tional Academy of Sciences of Ukraine, Ukraine; Science and Technology Facilities Council (STFC), United Kingdom; National Science Foundation of the United States of America (NSF) and United States Department of Energy, Office of Nuclear Physics (DOE NP), United States of America.

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Production of ω mesons in pp collisions at √s =7 TeV

Acharya, S; Adamová, D; Adler, A; Adolfsson, J; Aggarwal, M. M; Agha, S; Aglieri Rinella, G; Agnello, M

Acharya, S; Adamová, D; Adler, A; Adolfsson, J; Aggarwal, M. M; Agha, S; Aglieri Rinella, G; Agnello, M; Agrawal, N; Ahammed, Z; Ahmad, S; Ahn, S. U; Akbar, Z; Akindinov, A; Al-Turany, M; Alam, S. N; Albuquerque, D. S. D; Aleksandrov, D; Alessandro, B; Alfanda, H. M; Alfaro Molina, R; Ali, B; Ali, Y; Alici, A; Alizadehvandchali, N; Alkin, A; Alme, J; Alt, T; Altenkamper, L; Altsybeev, I; Anaam, M. N; Andrei, C; Andreou, D; Andronic, A; Angeletti, M; Anguelov, V; Antičić, T; Antinori, F; Antonioli, P; Apadula, N; Aphecetche, L; Appelshäuser, H; Arcelli, S; Arnaldi, R; Arratia, M; Arsene, I. C; Arslandok, M; Augustinus, A; Averbeck, R; Aziz, S; Azmi, M. D; Badalà, A; Baek, Y. W; Bagnasco, S; Bai, X; Bailhache, R; Bala, R; Balbino, A; Baldisseri, A; Ball, M; Balouza, S; Banerjee, D; Barbera, R; Barioglio, L; Barnaföldi, G. G; Barnby, L. S; Barret, V; Bartalini, P; Bartels, C; Barth, K; Bartsch, E; Baruffaldi, F; Bastid, N; Basu, S; Batigne, G; Batyunya, B; Bauri, D; Alba, J. L. 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The invariant differential cross section of inclusive ω(782) meson production at midrapidity (|y| < 0.5) in pp collisions at √s = 7 TeV was measured with the ALICE detector at the LHC over a transverse momentum range of 2 < pT < 17 GeV/c. The ω meson was reconstructed via its ω → π+π−π0 decay channel. The measured ω production cross section is compared to various calculations: PYTHIA 8.2 Monash 2013 describes the data, while PYTHIA 8.2 Tune 4C overestimates the data by about 50%. A recent NLO calculation, which includes a model describing the fragmentation of the whole vector-meson nonet, describes the data within uncertainties below 6 GeV/c, while it overestimates the data by up to 50% for higher pT. The ω/π0 ratio is in agreement with previous measurements at lower collision energies and the PYTHIA calculations. In addition, the measurement is compatible with transverse mass scaling within the measured pT range and the ratio is constant with C^(ω/π0) = 0.67±0.03 (stat) ±0.04 (sys) above a transverse momentum of 2.5 GeV/c. ; A. I. Alikhanyan National Science Laboratory (Yerevan Physics Institute) Foundation (ANSL), State Committee of Science and World Federation of Scientists (WFS), Armenia; Austrian Academy of Sciences, Austrian Science Fund (FWF): [M 2467-N36] and Nationalstiftung für Forschung, Technologie und Entwicklung, Austria; Ministry of Communications and High Technologies, National Nuclear Research Center, Azerbaijan; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Financiadora de Estudos e Projetos (Finep), Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) and Universidade Federal do Rio Grande do Sul (UFRGS), Brazil; Ministry of Education of China (MOEC) , Ministry of Science & Technology of China (MSTC) and National Natural Science Foundation of China (NSFC), China; Ministry of Science and Education and Croatian Science Foundation, Croatia; Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN), Cubaenergía, Cuba; Ministry of Education, Youth and Sports of the Czech Republic, Czech Republic; The Danish Council for Independent Research | Natural Sciences, the VILLUM FONDEN and Danish National Research Foundation (DNRF), Denmark; Helsinki Institute of Physics (HIP), Finland; Commissariat à l'Energie Atomique (CEA) and Institut National de Physique Nucléaire et de Physique des Particules (IN2P3) and Centre National de la Recherche Scientifique (CNRS), France; Bundesministerium für Bildung und Forschung (BMBF) and GSI Helmholtzzentrum für Schwerionenforschung GmbH, Germany; General Secretariat for Research and Technology, Ministry of Education, Research and Religions, Greece; National Research, Development and Innovation Office, Hungary; Department of Atomic Energy Government of India (DAE), Department of Science and Technology, Government of India (DST), University Grants Commission, Government of India (UGC) and Council of Scientific and Industrial Research (CSIR), India; Indonesian Institute of Science, Indonesia; Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi and Istituto Nazionale di Fisica Nucleare (INFN), Italy; Institute for Innovative Science and Technology , Nagasaki Institute of Applied Science (IIST), Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) and Japan Society for the Promotion of Science (JSPS) KAKENHI, Japan; Consejo Nacional de Ciencia (CONACYT) y Tecnología, through Fondo de Cooperación Internacional en Ciencia y Tecnología (FONCICYT) and Dirección General de Asuntos del Personal Academico (DGAPA), Mexico; Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands; The Research Council of Norway, Norway; Commission on Science and Technology for Sustainable Development in the South (COMSATS), Pakistan; Pontificia Universidad Católica del Perú, Peru; Ministry of Science and Higher Education, National Science Centre and WUT ID-UB, Poland; Korea Institute of Science and Technology Information and National Research Foundation of Korea (NRF), Republic of Korea; Ministry of Education and Scientific Research, Institute of Atomic Physics and Ministry of Research and Innovation and Institute of Atomic Physics, Romania; Joint Institute for Nuclear Research (JINR), Ministry of Education and Science of the Russian Federation, National Research Centre Kurchatov Institute, Russian Science Foundation and Russian Foundation for Basic Research, Russia; Ministry of Education, Science, Research and Sport of the Slovak Republic, Slovakia; National Research Foundation of South Africa, South Africa; Swedish Research Council (VR) and Knut & Alice Wallenberg Foundation (KAW), Sweden; European Organization for Nuclear Research, Switzerland; Suranaree University of Technology (SUT), National Science and Technology Development Agency (NSDTA) and Office of the Higher Education Commission under NRU project of Thailand, Thailand; Turkish Atomic Energy Agency (TAEK), Turkey; National Academy of Sciences of Ukraine, Ukraine; Science and Technology Facilities Council (STFC), United Kingdom; National Science Foundation of the United States of America (NSF) and United States Department of Energy, Office of Nuclear Physics (DOE NP), United States of America.

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Z-boson production in p-Pb collisions at $$ \sqrt{s_{\mathrm{NN}}} $$ = 8.16 TeV and Pb-Pb collisions at $$ \sqrt{s_{\mathrm{NN}}} $$ = 5.02 TeV

Acharya, S; Adamová, D; Adler, A; Adolfsson, J; Aggarwal, M. M; Aglieri Rinella, G; Agnello, M; Agrawal, N

Acharya, S; Adamová, D; Adler, A; Adolfsson, J; Aggarwal, M. M; Aglieri Rinella, G; Agnello, M; Agrawal, N; Ahammed, Z; Ahmad, S; Ahn, S. U; Akbar, Z; Akindinov, A; Al-Turany, M; Alam, S. N; Albuquerque, D. S. D; Aleksandrov, D; Alessandro, B; Alfanda, H. M; Alfaro Molina, R; Ali, B; Ali, Y; Alici, A; Alizadehvandchali, N; Alkin, A; Alme, J; Alt, T; Altenkamper, L; Altsybeev, I; Anaam, M. N; Andrei, C; Andreou, D; Andronic, A; Angeletti, M; Anguelov, V; Anson, C; Antičić, T; Antinori, F; Antonioli, P; Apadula, N; Aphecetche, L; Appelshäuser, H; Arcelli, S; Arnaldi, R; Arratia, M; Arsene, I. C; Arslandok, M; Augustinus, A; Averbeck, R; Aziz, S; Azmi, M. D; Badalà, A; Baek, Y. W; Bagnasco, S; Bai, X; Bailhache, R; Bala, R; Balbino, A; Baldisseri, A; Ball, M; Balouza, S; Banerjee, D; Barbera, R; Barioglio, L; Barnaföldi, G. G; Barnby, L. S; Barret, V; Bartalini, P; Bartels, C; Barth, K; Bartsch, E; Baruffaldi, F; Bastid, N; Basu, S; Batigne, G; Batyunya, B; Bauri, D; Bazo Alba, J. L; Bearden, I. G; Beattie, C; Bedda, C; Behera, N. K; Belikov, I; Bell Hechavarria, A. D. C; Bellini, F; Bellwied, R; Belyaev, V; Bencedi, G; Beole, S; Bercuci, A; Berdnikov, Y; Berdnikova, A; Berenyi, D; Bertens, R. A; Berzano, D; Besoiu, M. G; Betev, L; Bhasin, A; Bhat, I. R; Bhat, M. A; Bhatt, H; Bhattacharjee, B; Bianchi, A; Bianchi, L; Bianchi, N; Bielčík, J; Bielčíková, J; Bilandzic, A; Biro, G; Biswas, R; Biswas, S; Blair, J. T; Blau, D; Blume, C; Boca, G; Bock, F; Bogdanov, A; Boi, S; Bok, J; Boldizsár, L; Bolozdynya, A; Bombara, M; Bonomi, G; Borel, H; Borissov, A; Bossi, H; Botta, E; Bratrud, L; Braun-Munzinger, P; Bregant, M; Broz, M; Bruna, E; Bruno, G. E; Buckland, M. D; Budnikov, D; Buesching, H; Bufalino, S; Bugnon, O; Buhler, P; Buncic, P; Buthelezi, Z; Butt, J. B; Bysiak, S. A; Caffarri, D; Caliva, A; Calvo Villar, E; Camacho, J. M. M; Camacho, R. S; Camerini, P; Canedo, F. D. M; Capon, A. A; Carnesecchi, F; Caron, R; Castillo Castellanos, J; Castro, A. J; Casula, E. 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Measurement of Z-boson production in p-Pb collisions at √sNN = 8.16 TeV and Pb-Pb collisions at √sNN = 5.02 TeV is reported. It is performed in the dimuon decay channel, through the detection of muons with pseudorapidity −4 20 GeV/c in the laboratory frame. The invariant yield and nuclear modification factor are measured for opposite-sign dimuons with invariant mass 60 < mμμ < 120 GeV/c2 and rapidity 2.5 < ycmsμμ< 4. They are presented as a function of rapidity and, for the Pb-Pb collisions, of centrality as well. The results are compared with theoretical calculations, both with and without nuclear modifications to the Parton Distribution Functions (PDFs). In p-Pb collisions the center-of-mass frame is boosted with respect to the laboratory frame, and the measurements cover the backward (−4.46 < ycmsμμ < −2.96) and forward (2.03 < ycmsμμ < 3.53) rapidity regions. For the p-Pb collisions, the results are consistent within experimental and theoretical uncertainties with calculations that include both free-nucleon and nuclear-modified PDFs. For the Pb-Pb collisions, a 3.4σ deviation is seen in the integrated yield between the data and calculations based on the free-nucleon PDFs, while good agreement is found once nuclear modifications are considered. ; A. I. Alikhanyan National Science Laboratory (Yerevan Physics Insti- tute) Foundation (ANSL), State Committee of Science and World Federation of Scientists (WFS), Armenia; Austrian Academy of Sciences, Austrian Science Fund (FWF): [M 2467- N36] and Nationalstiftung fu ̈r Forschung, Technologie und Entwicklung, Austria; Ministry of Communications and High Technologies, National Nuclear Research Center, Azerbaijan; Conselho Nacional de Desenvolvimento Cient ́ıfico e Tecnol ́ogico (CNPq), Financiadora de Estudos e Projetos (Finep), Fundac ̧ ̃ao de Amparo `a Pesquisa do Estado de S ̃ao Paulo (FAPESP) and Universidade Federal do Rio Grande do Sul (UFRGS), Brazil; Ministry of Education of China (MOEC) , Ministry of Science & Technology of China (MSTC) and National Natural Science Foundation of China (NSFC), China; Ministry of Science and Education and Croatian Science Foundation, Croatia; Centro de Aplicaciones Tecnol ́ogicas y Desarrollo Nuclear (CEADEN), Cubaenerg ́ıa, Cuba; Ministry of Education, Youth and Sports of the Czech Republic, Czech Republic; The Danish Council for Independent Re- search — Natural Sciences, the VILLUM FONDEN and Danish National Research Foun- dation (DNRF), Denmark; Helsinki Institute of Physics (HIP), Finland; Commissariat `a l'Energie Atomique (CEA) and Institut National de Physique Nucl ́eaire et de Physique des Particules (IN2P3) and Centre National de la Recherche Scientifique (CNRS), France; Bundesministerium fu ̈r Bildung und Forschung (BMBF) and GSI Helmholtzzentrum fu ̈r Schwerionenforschung GmbH, Germany; General Secretariat for Research and Technology, Ministry of Education, Research and Religions, Greece; National Research, Develop- ment and Innovation Office, Hungary; Department of Atomic Energy Government of India (DAE), Department of Science and Technology, Government of India (DST), University Grants Commission, Government of India (UGC) and Council of Scientific and Industrial Research (CSIR), India; Indonesian Institute of Science, Indonesia; Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi and Istituto Nazionale di Fisica Nucleare (INFN), Italy; Institute for Innovative Science and Technology , Nagasaki Insti- tute of Applied Science (IIST), Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) and Japan Society for the Promotion of Science (JSPS) KAK- ENHI, Japan; Consejo Nacional de Ciencia (CONACYT) y Tecnolog ́ıa, through Fondo de Cooperaci ́on Internacional en Ciencia y Tecnolog ́ıa (FONCICYT) and Direcci ́on Gen- eral de Asuntos del Personal Academico (DGAPA), Mexico; Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands; The Research Council of Norway, Nor- way; Commission on Science and Technology for Sustainable Development in the South (COMSATS), Pakistan; Pontificia Universidad Cat ́olica del Peru ́, Peru; Ministry of Sci- ence and Higher Education, National Science Centre and WUT ID-UB, Poland; Korea Institute of Science and Technology Information and National Research Foundation of Ko- rea (NRF), Republic of Korea; Ministry of Education and Scientific Research, Institute of Atomic Physics and Ministry of Research and Innovation and Institute of Atomic Physics, Romania; Joint Institute for Nuclear Research (JINR), Ministry of Education and Science of the Russian Federation, National Research Centre Kurchatov Institute, Russian Science Foundation and Russian Foundation for Basic Research, Russia; Ministry of Education, Science, Research and Sport of the Slovak Republic, Slovakia; National Research Foun- dation of South Africa, South Africa; Swedish Research Council (VR) and Knut & Alice Wallenberg Foundation (KAW), Sweden; European Organization for Nuclear Research, Switzerland; Suranaree University of Technology (SUT), National Science and Technol- ogy Development Agency (NSDTA) and Office of the Higher Education Commission under NRU project of Thailand, Thailand; Turkish Atomic Energy Agency (TAEK), Turkey; Na- tional Academy of Sciences of Ukraine, Ukraine; Science and Technology Facilities Council (STFC), United Kingdom; National Science Foundation of the United States of America (NSF) and United States Department of Energy, Office of Nuclear Physics (DOE NP), United States of America

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First observation of an attractive interaction between a proton and a cascade baryon

Acharya, S; Adamová, D; Adhya, S. P; Adler, A; Adolfsson, J; Aggarwal, M. M; Aglieri Rinella, G; Agnello, M

Acharya, S; Adamová, D; Adhya, S. P; Adler, A; Adolfsson, J; Aggarwal, M. M; Aglieri Rinella, G; Agnello, M; Agrawal, N; Ahammed, Z; Ahmad, S; Ahn, S. U; Aiola, S; Akindinov, A; Al-Turany, M; Alam, S. N; Albuquerque, D. S. D; Aleksandrov, D; Alessandro, B; Alfanda, H. M; Alfaro Molina, R; Ali, B; Ali, Y; Alici, A; Alkin, A; Alme, J; Alt, T; Altenkamper, L; Altsybeev, I; Anaam, M. N; Andrei, C; Andreou, D; Andrews, H. A; Andronic, A; Angeletti, M; Anguelov, V; Anson, C; Antičić, T; Antinori, F; Antonioli, P; Anwar, R; Apadula, N; Aphecetche, L; Appelshäuser, H; Arcelli, S; Arnaldi, R; Arratia, M; Arsene, I. C; Arslandok, M; Augustinus, A; Averbeck, R; Aziz, S; Azmi, M. D; Badalà, A; Baek, Y. W; Bagnasco, S; Bailhache, R; Bala, R; Baldisseri, A; Ball, M; Baral, R. C; Barbera, R; Barioglio, L; Barnaföldi, G. G; Barnby, Lee; Barret, V; Bartalini, P; Barth, K; Bartsch, E; Baruffaldi, F; Bastid, N; Basu, S; Batigne, G; Batyunya, B; Batzing, P. C; Bauri, D; Bazo Alba, J. L; Bearden, I. 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This Letter presents the first experimental observation of the attractive strong interaction between a proton and a multistrange baryon (hyperon) Ξ−. The result is extracted from two-particle correlations of combined p−Ξ−⊕¯p−¯Ξ+ pairs measured in p−Pb collisions at √sNN=5.02 TeV at the LHC with ALICE. The measured correlation function is compared with the prediction obtained assuming only an attractive Coulomb interaction and a standard deviation in the range [3.6, 5.3] is found. Since the measured p−Ξ−⊕¯p−¯Ξ+ correlation is significantly enhanced with respect to the Coulomb prediction, the presence of an additional, strong, attractive interaction is evident. The data are compatible with recent lattice calculations by the HAL-QCD Collaboration, with a standard deviation in the range [1.8, 3.7]. The lattice potential predicts a shallow repulsive Ξ− interaction within pure neutron matter and this implies stiffer equations of state for neutron-rich matter including hyperons. Implications of the strong interaction for the modeling of neutron stars are discussed. ; A. I. Alikhanyan National Science Laboratory (Yerevan Physics Institute) Foundation (ANSL), State Committee of Science and World Federation of Scientists (WFS), Armenia; Austrian Academy of Sciences, Austrian Science Fund (FWF): [M 2467-N36] and Nationalstiftung für Forschung, Technologie und Entwicklung, Austria; Ministry of Communications and High Technologies, National Nuclear Research Center, Azerbaijan; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Universidade Federal do Rio Grande do Sul (UFRGS), Financiadora de Estudos e Projetos (Finep) and Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP), Brazil; Ministry of Science & Technology of China (MSTC), National Natural Science Foundation of China (NSFC) and Ministry of Education of China (MOEC), China; Croatian Science Foundation and Ministry of Science and Education, Croatia; Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN), Cubaenergía, Cuba; Ministry of Education, Youth and Sports of the Czech Republic, Czech Republic; The Danish Council for Independent Research—Natural Sciences, the Carlsberg Foundation and Danish National Research Foundation (DNRF), Denmark; Helsinki Institute of Physics (HIP), Finland; Commissariat à l'Energie Atomique (CEA), Institut National de Physique Nucléaire et de Physique des Particules (IN2P3) and Centre National de la Recherche Scientifique (CNRS) and Rlégion des Pays de la Loire, France; Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie (BMBF) and GSI Helmholtzzentrum für Schwerionenforschung GmbH, Germany; General Secretariat for Research and Technology, Ministry of Education, Research and Religions, Greece; National Research, Development and Innovation Office, Hungary; Department of Atomic Energy Government of India (DAE), Department of Science and Technology, Government of India (DST), University Grants Commission, Government of India (UGC) and Council of Scientific and Industrial Research (CSIR), India; Indonesian Institute of Science, Indonesia; Centro Fermi—Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi and Istituto Nazionale di Fisica Nucleare (INFN), Italy; Institute for Innovative Science and Technology, Nagasaki Institute of Applied Science (IIST), Japan Society for the Promotion of Science (JSPS) KAKENHI and Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan; Consejo Nacional de Ciencia (CONACYT) y Tecnología, through Fondo de Cooperación Internacional en Ciencia y Tecnología (FONCICYT) and Dirección General de Asuntos del Personal Academico (DGAPA), Mexico; Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands; The Research Council of Norway, Norway; Commission on Science and Technology for Sustainable Development in the South (COMSATS), Pakistan; Pontificia Universidad Católica del Perú, Peru; Ministry of Science and Higher Education and National Science Centre, Poland; Korea Institute of Science and Technology Information and National Research Foundation of Korea (NRF), Republic of Korea; Ministry of Education and Scientific Research, Institute of Atomic Physics and Ministry of Research and Innovation and Institute of Atomic Physics, Romania; Joint Institute for Nuclear Research (JINR), Ministry of Education and Science of the Russian Federation, National Research Centre Kurchatov Institute, Russian Science Foundation and Russian Foundation for Basic Research, Russia; Ministry of Education, Science, Research and Sport of the Slovak Republic, Slovakia; National Research Foundation of South Africa, South Africa; Swedish Research Council (VR) and Knut & Alice Wallenberg Foundation (KAW), Sweden; European Organization for Nuclear Research, Switzerland; National Science and Technology Development Agency (NSDTA), Suranaree University of Technology (SUT) and Office of the Higher Education Commission under NRU project of Thailand, Thailand; Turkish Atomic Energy Agency (TAEK), Turkey; National Academy of Sciences of Ukraine, Ukraine; Science and Technology Facilities Council (STFC), United Kingdom; National Science Foundation of the United States of America (NSF) and United States Department of Energy, Office of Nuclear Physics (DOE NP), United States of America.

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