Measurements of the production cross-section for a Z boson in association with b-jets in proton-proton collisions at p s = 13 TeV with the ATLAS detector
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Hadron-Hadron scattering (experiments)
Aad, G., Abbott, B., Abdallah, J., Khalek, S. A., Aben, R., Abi, B., ... & Abreu, R. (2014). Measurement of differential production cross-sections for a Z boson in association with b-jets in 7 TeV proton-proton collisions with the ATLAS detector. Journal of High Energy Physics, 2014(10), 141. [https://doi.org/10.1007/JHEP07(2020)044]
PatrocinadorANPCyT; YerPhI, Armenia; Australian Research Council; BMWFW, Austria; Austrian Science Fund (FWF); Azerbaijan National Academy of Sciences (ANAS); SSTC, Belarus; National Council for Scientific and Technological Development (CNPq); Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP); Natural Sciences and Engineering Research Council of Canada; Canada Foundation for Innovation; Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT); National Natural Science Foundation of China (NSFC); Departamento Administrativo de Ciencia, Tecnologia e Innovacion Colciencias; Ministry of Education, Youth & Sports - Czech Republic Czech Republic Government; Czech Republic Government; DNRF, Denmark; Danish Natural Science Research Council; Centre National de la Recherche Scientifique (CNRS); CEA-DRF/IRFU, France; Federal Ministry of Education & Research (BMBF); Max Planck Society; Greek Ministry of Development-GSRT; RGC, China; Israel Science Foundation; Benoziyo Center, Israel; Istituto Nazionale di Fisica Nucleare (INFN); Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT); Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Japan Society for the Promotion of Science; CNRST, Morocco; RCN, Norway; Ministry of Science and Higher Education, Poland; NCN, Poland; Portuguese Foundation for Science and Technology; MNE/IFA, Romania; NRC KI, Russia Federation; MESTD, Serbia; MSSR, Slovakia; Slovenian Research Agency - Slovenia; MIZS, Slovenia; MINECO, Spain; SRC, Sweden; Wallenberg Foundation, Sweden; SERI, Switzerland; Ministry of Science and Technology, Taiwan; Ministry of Energy & Natural Resources - Turkey; Science & Technology Facilities Council (STFC); United States Department of Energy (DOE); National Science Foundation (NSF); BCKDF, Canada; CANARIE, Canada; CRC, Canada; European Union (EU) European Research Council (ERC); European Union (EU); French National Research Agency (ANR); French National Research Agency (ANR); German Research Foundation (DFG); Alexander von Humboldt Foundation; Greek NSRF, Greece; BSF-NSF, Israel; German-Israeli Foundation for Scientific Research and Development; CERCA Programme Generalitat de Catalunya, Spain; PROMETEO Programme Generalitat Valenciana, Spain; Goran Gustafssons Stiftelse, Sweden; Royal Society of London; Leverhulme Trust; NRC, Canada; CERN; Chinese Academy of Sciences; Ministry of Science and Technology, China; HGF, Germany; SRNSFG, Georgia; Hong Kong SAR, China; Netherlands Organization for Scientific Research (NWO) Netherlands Government; MES of Russia, Russia Federation; JINR; DST/NRF, South Africa; Swiss National Science Foundation (SNSF); Cantons of Bern and Geneva, Switzerland; Compute Canada, Canada; Horizon 2020; Marie Sklodowska-Curie Actions; COST, European Union; French National Research Agency (ANR); Herakleitos; Thales; Aristeia programmes; EU-ESF, Greece
This paper presents a measurement of the production cross-section of aZboson in association withb-jets, in proton-proton collisions at root s = 13 TeV with the ATLAS experiment at the Large Hadron Collider using data corresponding to an integrated luminosity of 35.6 fb(-1). Inclusive and differential cross-sections are measured for events containing aZboson decaying into electrons or muons and produced in association with at least one or at least two b-jets with transverse momentum p(T)>20 GeV and rapidity vertical bar y vertical bar <2.5. Predictions from several Monte Carlo generators based on leading-order (LO) or next-to-leading-order (NLO) matrix elements interfaced with a parton-shower simulation and testing different flavour schemes for the choice of initial-state partons are compared with measured cross-sections. The 5-flavour number scheme predictions at NLO accuracy agree better with data than 4-flavour number scheme ones. The 4-flavour number scheme predictions underestimate data in events with at least one b-jet.