Measurement of isolated-photon plus two-jet production in pp collisions at root s=13 TeV with the ATLAS detector

Abstract

WOS: 000524515700001 ; The dynamics of isolated-photon plus two-jet production in pp collisions at a centre-of-mass energy of 13 TeV are studied with the ATLAS detector at the LHC using a dataset corresponding to an integrated luminosity of 36.1 fb(-1). Cross sections are measured as functions of a variety of observables, including angular correlations and invariant masses of the objects in the final state, gamma + jet + jet. Measurements are also performed in phase-space regions enriched in each of the two underlying physical mechanisms, namely direct and fragmentation processes. The measurements cover the range of photon (jet) transverse momenta from 150 GeV (100 GeV) to 2 TeV. The tree-level plus parton-shower predictions from Sherpa and Pythia as well as the next-to-leading-order QCD predictions from Sherpa are compared with the measurements. The next-to-leading-order QCD predictions describe the data adequately in shape and normalisation except for regions of phase space such as those with high values of the invariant mass or rapidity separation of the two jets, where the predictions overestimate the data. ; ANPCyT, ArgentinaANPCyT; YerPhI, Armenia; ARC, AustraliaAustralian Research Council; FWF, AustriaAustrian Science Fund (FWF); BMWFW, Austria; ANAS, AzerbaijanAzerbaijan National Academy of Sciences (ANAS); SSTC, Belarus; CNPq, BrazilNational Council for Scientific and Technological Development (CNPq); FAPESP, BrazilFundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP); NSERC, CanadaNatural Sciences and Engineering Research Council of Canada; CFI, CanadaCanada Foundation for Innovation; NRC, Canada; CERN; CONICYT, ChileComision Nacional de Investigacion Cientifica y Tecnologica (CONICYT); CAS, ChinaChinese Academy of Sciences; NSFC, ChinaNational Natural Science Foundation of China; MOST, ChinaMinistry of Science and Technology, China; COLCIENCIAS, ColombiaDepartamento Administrativo de Ciencia, Tecnologia e Innovacion Colciencias; VSC CR, Czech RepublicCzech Republic Government; MSMT CR, Czech RepublicMinistry of Education, Youth & Sports - Czech RepublicCzech Republic Government; MPO CR, Czech RepublicCzech Republic Government; DNSRC, DenmarkDanish Natural Science Research Council; DNRF, Denmark; IN2P3-CNRS, FranceCentre National de la Recherche Scientifique (CNRS); CEA-DRF/IRFU, France; SRNSFG, Georgia; MPG, GermanyMax Planck Society; HGF, Germany; BMBF, GermanyFederal Ministry of Education & Research (BMBF); GSRT, GreeceGreek Ministry of Development-GSRT; RGC, Hong Kong SAR, Hong Kong China; Benoziyo Center, ISF, Israel; INFN, ItalyIstituto Nazionale di Fisica Nucleare; JSPS, JapanMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of Science; JINR; CNRST, Morocco; NWO, NetherlandsNetherlands Organization for Scientific Research (NWO)Netherlands Government; RCN, Norway; MNiSW, PolandMinistry of Science and Higher Education, Poland; FCT, PortugalPortuguese Foundation for Science and Technology; MNE/IFA, Romania; NRC KI, Russia Federation; MESTD, Serbia; MSSR, Slovakia; ARRS, SloveniaSlovenian Research Agency - Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC, Sweden; Wallenberg Foundation, Sweden; Canton of Bern, Switzerland; Canton of Geneva, Switzerland; SNSF, SwitzerlandSwiss National Science Foundation (SNSF); SERI, Switzerland; MOST, TaiwanMinistry of Science and Technology, Taiwan; TAEK, TurkeyMinistry of Energy & Natural Resources - Turkey; STFC, United KingdomScience & Technology Facilities Council (STFC); DOE, United states of AmericaUnited States Department of Energy (DOE); NSF, United states of AmericaNational Science Foundation (NSF); CRC, Canada; Compute Canada, Canada; Canarie, Canada; BCKDF, Canada; Marie Sklodowska-Curie, European UnionEuropean Union (EU); COST, European Union; ERDF, European UnionEuropean Union (EU); ERC, European UnionEuropean Union (EU)European Research Council (ERC); Horizon 2020, European Union; ANR, Investissements d'Avenir Labex and Idex, FranceFrench National Research Agency (ANR); AvH, GermanyAlexander von Humboldt Foundation; DFG, GermanyGerman Research Foundation (DFG); Herakleitos programme; Thales programme; Aristeia programme; EU-ESF, Greece; Greek NSRF, Greece; BSF-NSF, Israel; GIF, IsraelGerman-Israeli Foundation for Scientific Research and Development; PROMETEO Programme Generalitat Valenciana, Spain; CERCA Generalitat de Catalunya, Spain; Leverhulme Trust, United KingdomLeverhulme Trust; Royal Society, United KingdomRoyal Society of London; MIZS, Slovenia; NCN, Poland; MES of Russia, Russia Federation; MEXT, JapanMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT) ; We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; FWF, BMWFW, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq, FAPESP, Brazil; NSERC, CFI, NRC, Canada; CERN, CERN; CONICYT, Chile; CAS, NSFC, MOST, China; COLCIENCIAS, Colombia; VSC CR, MSMT CR, MPO CR, Czech Republic; DNSRC, DNRF, Denmark; IN2P3-CNRS, CEA-DRF/IRFU, France; SRNSFG, Georgia; MPG, HGF, BMBF, Germany; GSRT, Greece; RGC, Hong Kong SAR, Hong Kong China; Benoziyo Center, ISF, Israel; INFN, Italy; JSPS, MEXT, Japan; JINR, JINR; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MNiSW, NCN, Poland; FCT, Portugal; MNE/IFA, Romania; NRC KI, MES of Russia, Russia Federation; MESTD, Serbia; MSSR, Slovakia; ARRS, MIZ~ S, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC, Wallenberg Foundation, Sweden; Cantons of Bern and Geneva, SNSF, SERI, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, United Kingdom; DOE, NSF, United states of America. In addition, individual groups and members have received support from CRC, Compute Canada, Canarie, BCKDF, Canada; Marie Sklodowska-Curie, COST, ERDF, ERC, Horizon 2020, European Union; ANR, Investissements d'Avenir Labex and Idex, France; AvH, DFG, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF, Greece; BSF-NSF, GIF, Israel; PROMETEO Programme Generalitat Valenciana, CERCA Generalitat de Catalunya, Spain; Leverhulme Trust, The Royal Society, United Kingdom.