117990 20240319081017.0 doi 10.1016/j.physletb.2022.137077 sideral 129406 ART-2022-129406 eng ATLAS Collaboration Measurement of the nuclear modification factor for muons from charm and bottom hadrons in Pb+Pb collisions at 5.02 TeV with the ATLAS detector 2022 Access copy available to the general public Unrestricted Heavy-flavour hadron production provides information about the transport properties and microscopic structure of the quark–gluon plasma created in ultra-relativistic heavy-ion collisions. A measurement of the muons from semileptonic decays of charm and bottom hadrons produced in Pb+Pb and pp collisions at a nucleon–nucleon centre-of-mass energy of 5.02 TeV with the ATLAS detector at the Large Hadron Collider is presented. The Pb+Pb data were collected in 2015 and 2018 with sampled integrated luminosities of and , respectively, and pp data with a sampled integrated luminosity of were collected in 2017. Muons from heavy-flavour semileptonic decays are separated from the light-flavour hadronic background using the momentum imbalance between the inner detector and muon spectrometer measurements, and muons originating from charm and bottom decays are further separated via the muon track's transverse impact parameter. Differential yields in Pb+Pb collisions and differential cross sections in pp collisions for such muons are measured as a function of muon transverse momentum from 4 GeV to 30 GeV in the absolute pseudorapidity interval . Nuclear modification factors for charm and bottom muons are presented as a function of muon transverse momentum in intervals of Pb+Pb collision centrality. The bottom muon results are the most precise measurement of b quark nuclear modification at low transverse momentum where reconstruction of B hadrons is challenging. The measured nuclear modification factors quantify a significant suppression of the yields of muons from decays of charm and bottom hadrons, with stronger effects for muons from charm hadron decays. info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 4.3 2022 PHYSICS, NUCLEAR 3 / 19 = 0.158 2022 Q1 T1 PHYSICS, PARTICLES & FIELDS 9 / 29 = 0.31 2022 Q2 T1 ASTRONOMY & ASTROPHYSICS 18 / 69 = 0.261 2022 Q2 T1 1.704 2022 Nuclear and High Energy Physics 2022 Q1 9.8 2022 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion García Pascual, Juan Antonio Universidad de Zaragoza (orcid)0000-0002-7399-7353 2004 390 Universidad de Zaragoza Dpto. Física Teórica Área Física Atóm.Molec.y Nucl. 829 (2022), 137077 [23 pp.] Phys. lett., Sect. B Physics Letters B 0370-2693 1728180 http://zaguan.unizar.es/record/117990/files/texto_completo.pdf Versión publicada 2721297 http://zaguan.unizar.es/record/117990/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:117990 articulos driver 2024-03-18-15:46:49 ARTICLE