Measurement of beauty production via non-prompt D0 mesons in Pb-Pb collisions at √sNN = 5.02 TeV

Summary, in English

The production of non-prompt D0 mesons from beauty-hadron decays was measured at midrapidity (|y| < 0.5) in Pb-Pb collisions at a nucleon-nucleon center-of-mass energy of sNN = 5.02 TeV with the ALICE experiment at the LHC. Their nuclear modification factor (RAA), measured for the first time down to pT = 1 GeV/c in the 0–10% and 30–50% centrality classes, indicates a significant suppression, up to a factor of about three, for pT> 5 GeV/c in the 0–10% central Pb-Pb collisions. The data are described by models that include both collisional and radiative processes in the calculation of beauty-quark energy loss in the quark-gluon plasma, and quark recombination in addition to fragmentation as a hadronisation mechanism. The ratio of the non-prompt to prompt D0-meson RAA is larger than unity for pT> 4 GeV/c in the 0–10% central Pb-Pb collisions, as predicted by models in which beauty quarks lose less energy than charm quarks in the quark-gluon plasma because of their larger mass. [Figure not available: see fulltext.] © 2022, The Author(s).

• Author: S. Acharya; J. Adolfsson; S. Basu; P. Christiansen; O. Matonoha; A.F. Nassirpour; A. Ohlson; A. Oskarsson; T. Richert; O.V. Rueda; D. Silvermyr; N. Zurlo
• Department/s: Particle and nuclear physics; eSSENCE: The e-Science Collaboration
• Publishing year: 2022
• Language: English
• Publication/Series: Journal of High Energy Physics
• Volume: 2022
• Issue: 12
• Links: http://dx.doi.org/10.1007/JHEP12(2022)126
• Document type: Journal article
• Publisher: Springer
• Topic: Subatomic Physics
• Keywords: Heavy Ion Experiments; Heavy Quark Production; Quark Gluon Plasma
• Status: Published
• ISBN/ISSN/Other: ISSN: 1029-8479