Measurements of the production cross-section for a Z boson in association with b-jets in proton-proton collisions at sqrt{s}=13 TeV with the ATLAS detector

• Autores: Aad, G.; Abbott, B.; Abbott, D. C.; Abed Abud, A.; Abeling, K.; Abhayasinghe, D. K.; Abidi, S. H.; AbouZeid, O. S.; Abraham, N. L.; Abramowicz, H.; Abreu, H.; Abulaiti, Y.; Acharya, B. S.; Achkar, B.; Adam, L.; Bourdarios, C. Adam; Adamczyk, L.; Adamek, L.; Adelman, J.; Adersberger, M.; Adiguzel, A.; Adorni, S.; Adye, T.; Affolder, A. A.; Afik, Y.; Agapopoulou, C.; Agaras, M. N.; Aggarwal, A.; Agheorghiesei, C.; Piegaia, Ricardo Nestor
• Año de publicación: 2020
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: LHC; ATLAS; SM; Zb
• Institución: Consejo Nacional de Investigaciones Científicas y Técnicas

This paper presents a measurement of the production cross-section of a Z boson in association with b-jets, in proton-proton collisions at 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 a Z boson decaying into electrons or muons and produced in association with at least one or at least two b-jets with transverse momentum pT> 20 GeV and rapidity |y|<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.
Fil: Aad, G.. Aix Marseille Université; Francia. Centre National de la Recherche Scientifique; Francia
Fil: Abbott, B.. Oklahoma State University; Estados Unidos
Fil: Abbott, D. C.. University of Massachusetts; Estados Unidos
Fil: Abed Abud, A.. Cern - European Organization for Nuclear Research; Suiza
Fil: Abeling, K.. Universität Göttingen; Alemania
Fil: Abhayasinghe, D. K.. Royal Holloway University of London; Reino Unido
Fil: Abidi, S. H.. University of Toronto; Canadá
Fil: AbouZeid, O. S.. Universidad de Copenhagen; Dinamarca
Fil: Abraham, N. L.. University of Sussex; Reino Unido
Fil: Abramowicz, H.. Universitat Tel Aviv; Israel
Fil: Abreu, H.. Technion - Israel Institute of Technology; Israel
Fil: Abulaiti, Y.. Argonne National Laboratory; Estados Unidos
Fil: Acharya, B. S.. Universita Di Udine.; Italia. King’s College London; Reino Unido
Fil: Achkar, B.. Universität Göttingen; Alemania
Fil: Adam, L.. Johannes Gutenberg Universitat Mainz; Alemania
Fil: Bourdarios, C. Adam. Universite Grenoble Alpes; Francia. Université Savoie Mont Blanc; Francia
Fil: Adamczyk, L.. University of Science and Technology; Reino Unido
Fil: Adamek, L.. University of Toronto; Canadá
Fil: Adelman, J.. Northern Illinois University; Estados Unidos
Fil: Adersberger, M.. Technische Universitat München; Alemania
Fil: Adiguzel, A.. Faculty of Engineering and Natural Sciences; Turquía
Fil: Adorni, S.. Université de Genéve; Suiza
Fil: Adye, T.. Rutherford Appleton Laboratory; Reino Unido
Fil: Affolder, A. A.. University Of California At Santa Cruz.; Estados Unidos
Fil: Afik, Y.. Technion - Israel Institute of Technology; Israel
Fil: Agapopoulou, C.. Universite de Paris; Francia
Fil: Agaras, M. N.. Université Clermont Auvergne; Francia
Fil: Aggarwal, A.. Humboldt-Universität zu Berlin; Alemania
Fil: Agheorghiesei, C.. Transilvania University of Brasov; Reino Unido
Fil: Piegaia, Ricardo Nestor. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina