Search for the X (5568) State Decaying into Bs0 ?± in Proton-Proton Collisions at s =8 TeV

Abstract

PubMed: 29864318 ; 2-s2.0-85047817215 ; A search for resonancelike structures in the Bs0?± invariant mass spectrum is performed using proton-proton collision data collected by the CMS experiment at the LHC at s=8 TeV, corresponding to an integrated luminosity of 19.7 fb-1. The Bs0 mesons are reconstructed in the decay chain Bs0?J/??, with J/???+?- and ??K+K-. The Bs0?± invariant mass distribution shows no statistically significant peaks for different selection requirements on the reconstructed Bs0 and ?± candidates. Upper limits are set on the relative production rates of the X(5568) and Bs0 states times the branching fraction of the decay X(5568)±?Bs0?±. In addition, upper limits are obtained as a function of the mass and the natural width of possible exotic states decaying into Bs0?±. © 2018 CERN. ; ST/I003622/1, ST/I505580/1, ST/J004871/1, ST/J005479/1, ST/K003542/1, ST/L005603/1, ST/M004775/1, ST/N000242/1 2012/07/E/ST2/01406, 2014/ 13/B/ST2/02543, 2014/14/M/ST2/00428, 2014/15/B/ST2/03998, 2015/19/B/ ST2/02861 National Science Foundation, NSF: 1151640, 1508869, 1606321 National Institutes of Health, NIH U.S. Department of Energy, USDOE Alfred P. Sloan Foundation Welch Foundation: C-1845 Hispanics in Philanthropy, HIP CS Fund, CSF Alexander von Humboldt-Stiftung Departamento Administrativo de Ciencia, Tecnología e Innovación (COLCIENCIAS) California Earthquake Authority, CEA Qatar National Research Fund, QNRF Secretaría de Educación Pública, SEP Türkiye Atom Enerjisi Kurumu, TAEK Horizon 2020 Framework Programme, H2020: 675440 Weston Havens Foundation Louisiana Academy of Sciences, LAS Missouri University of Science and Technology, MST CERN College of Arts and Sciences, University of Nebraska-Lincoln, CAS Norwegian Sequencing Centre, NSC Institute for the Promotion of Teaching Science and Technology, IPST Mountain Equipment Co-operative, MEC Science and Technology Facilities Council, STFC: ST/F007434/1, ST/N001273/1 Royal Astronomical Society, RAS European Commission, EC European Research Council, ERC Ministry of Education - Singapore, MOE Department of Atomic Energy, Government of India, ???? Science Foundation Ireland, SFI Helmholtz-Gemeinschaft, HGF Deutsche Forschungsgemeinschaft, DFG Fundação de Amparo à Pesquisa do Estado de São Paulo, FAPESP National Natural Science Foundation of China, NSFC Research Promotion Foundation, ???? Ministerstvo Školství, Mláde?e a T?lov?chovy, MŠMT Fundacja na rzecz Nauki Polskiej, FNP Fundação para a Ciência e a Tecnologia, FCT Russian Foundation for Basic Research, ???? Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, CAPES Academy of Finland Bundesministerium für Bildung und Forschung, BMBF Austrian Science Fund, FWF Fonds De La Recherche Scientifique - FNRS, FNRS Belgian Federal Science Policy Office, BELSPO Chulalongkorn University, CU Fonds Wetenschappelijk Onderzoek, FWO Agentschap voor Innovatie door Wetenschap en Technologie, IWT Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture, FRIA Consejo Nacional de Ciencia y Tecnología, CONACYT Bundesministerium für Wissenschaft, Forschung und Wirtschaft, BMWFW Ministry of Education and Science of the Russian Federation, Minobrnauka: 3.2989.2017 General Secretariat for Research and Technology, GSRT Hungarian Scientific Research Fund, OTKA Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq Ministry of Science, ICT and Future Planning, MSIP Ministry of Science and Technology, MOST National Research Foundation of Korea, NRF Joint Institute for Nuclear Research, JINR Instituto Nazionale di Fisica Nucleare, INFN A.G. Leventis Foundation National Science and Technology Development Agency, ????: Thailand Secretaría de Educación Superior, Ciencia, Tecnología e Innovación, SENESCYT Universiti Malaya, UM Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, FAPERJ Ministry for Business Innovation and Employment, MBIE National Academy of Sciences of Ukraine, NASU Ministry of Education and Science, MES Institute for Research in Fundamental Sciences, IPM Benemérita Universidad Autónoma de Puebla, BUAP Secretaría de Estado de Investigación, Desarrollo e Innovación, SEIDI Horizon 2020 European Regional Development Fund, FEDER State Atomic Energy Corporation ROSATOM, ROSATOM Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, CINVESTAV Pakistan Atomic Energy Commission, PAEC State Fund for Fundamental Research of Ukraine, SFFR Department of Science and Technology, Government of West Bengal, DST ; We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centres and personnel of the Worldwide LHC Computing Grid for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMWFW and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES and CSF (Croatia); RPF (Cyprus); SENESCYT (Ecuador); MoER, ERC IUT, and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NIH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic of Korea); LAS (Lithuania); MOE and UM (Malaysia); BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI (Mexico); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS, RFBR and RAEP (Russia); MESTD (Serbia); SEIDI, CPAN, PCTI and FEDER (Spain); Swiss Funding Agencies (Switzerland); MST (Taipei); ThEPCenter, IPST, STAR, and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU and SFFR (Ukraine); STFC (United Kingdom); DOE and NSF (USA). Individuals have received support from the Marie-Curie programme and the European Research Council and Horizon 2020 Grant, Contract No. 675440 (European Union); the Leventis Foundation; the A. P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal Science Policy Office; the Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); the Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; the Council of Science and Industrial Research, India; the HOMING PLUS programme of the Foundation for Polish Science, cofinanced from European Union, Regional Development Fund, the Mobility Plus programme of the Ministry of Science and Higher Education, the National Science Center (Poland), Contracts Harmonia 2014/14/M/ST2/00428, Opus 2014/ 13/B/ST2/02543, 2014/15/B/ST2/03998, and 2015/19/B/ ST2/02861, Sonata-bis 2012/07/E/ST2/01406; the National Priorities Research Program by Qatar National Research Fund; the Russian Ministry of Education and Science, Contracts No. 3.2989.2017 and No. 14.A12.31.0006; the Programa Severo Ochoa del Principado de Asturias; the Thalis and Aristeia programmes cofinanced by EU-ESF and the Greek NSRF; the Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University and the Chulalongkorn Academic into Its 2nd Century Project Advancement Project (Thailand); the Welch Foundation, Contract No. C-1845; and the Weston Havens Foundation (USA).