Elliptic Flow of Muons from Heavy-Flavour Hadron Decays at Forward Rapidity in Pb–Pb Collisions at √sNN = 2.76 TeV
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The elliptic flow, v₂, of muons from heavy-flavour hadron decays at forward rapidity (2.5 < y < 4) is measured in Pb–Pb collisions at √sNN = 2.76 TeV with the ALICE detector at the LHC. The scalar product, two- and four-particle Q cumulants and Lee–Yang zeros methods are used. The dependence of the v₂ of muons from heavy-flavour hadron decays on the collision centrality, in the range 0–40%, and on transverse momentum, p[subscript T], is studied in the interval 3 < p[subscript T] < 10GeV/c. A positive is observed with the scalar product and two-particle Q cumulants in semi-central collisions (10–20% and 20–40% centrality classes) for the p[subscript T] interval from 3 to about 5 GeV/c with a significance larger than 3σ, based on the combination of statistical and systematic uncertainties. The v₂ magnitude tends to decrease towards more central collisions and with increasing p[subscript T]. It becomes compatible with zero in the interval 6 < p[subscript T] < 10GeV/c. The results are compared to models describing the interaction of heavy quarks and open heavy-flavour hadrons with the high-density medium formed in high-energy heavy-ion collisions. Keywords: LHC; ALICE experiment; Pb–Pb collisions; Heavy-flavour decay muons; Elliptic flow
Date issued
2015-12Department
MIT Kavli Institute for Astrophysics and Space Research; Massachusetts Institute of Technology. Department of PhysicsJournal
Physics Letters B
Publisher
Elsevier
Citation
Adam, J. et al. “Elliptic Flow of Muons from Heavy-Flavour Hadron Decays at Forward Rapidity in Pb–Pb Collisions at √sNN = 2.76 TeV.” Physics Letters B 753 (February 2016): 41–56 © 2015 CERN for the benefit of the ALICE Collaboration
Version: Final published version
ISSN
0370-2693