Inclusive heavy-flavour production at central and forward rapidity in Xe-Xe collisions at , root sNN=5.44 TeV

The ALICE Collaboration, S. Acharya, D. Adamova, D. J. Kim, F. Krizek, Norbert Novitzky, B.S. Onnerstad, J. E. Parkkila, Jan Rak, Heidi Maria Rytkönen, Sami Räsänen, Oskari Antti Matti Saarimäki, M. Slupecki, W. H. Trzaska

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The first measurements of the production of muons and electrons from heavy-flavour hadron decays in Xe-Xe collisions at root s(NN) = 5.44 TeV, using the ALICE detector at the LHC, are reported. The measurement of the nuclear modification factor RAA is performed as a function of transverse momentum pT in several centrality classes at forward rapidity (2.5 < y < 4) and midrapidity (vertical bar y vertical bar < 0.8) for muons and electrons from heavy-flavour hadron decays, respectively. A suppression by a factor up to about 2.5 compared to the binary-scaled pp reference is observed in central collisions at both central and forward rapidities. The RAA of muons from heavy-flavour hadron decays is compared to previous measurements in Pb-Pb collisions at root sNN = 5.02 TeV. When the nuclear modification factors are compared in the centrality classes 0-10% for Xe-Xe collisions and 10-20% for Pb-Pb collisions, which have similar charged-particle multiplicity density, a similar suppression, with R-AA similar to 0.4 in the p(T) interval 4 < p(T) < 8 GeV/c, is observed. The comparison of the measured R-AA values in the two collision systems brings new insights on the properties of the quark-gluon plasma by investigating the system-size and geometry dependence of medium-induced parton energy loss. The results of muons and electrons from heavy-flavour hadron decays provide new constraints to model calculations. (C) 2021 The Author. Published by Elsevier B.V.

Original languageEnglish
Article number136437
JournalPhysics Letters B
Volume819
Number of pages16
ISSN0370-2693
DOIs
Publication statusPublished - 10 Aug 2021
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 114 Physical sciences
  • RADIATIVE ENERGY-LOSS
  • PB-PB COLLISIONS
  • HADRON DECAYS
  • TRANSVERSE-MOMENTUM
  • J/PSI PRODUCTION
  • PP COLLISIONS
  • SUPPRESSION
  • ELECTRONS
  • DEPENDENCE
  • MESONS

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