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Elliptic flow of muons from heavy-flavour hadron decays at forward rapidity in Pb-Pb collisions at
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文摘
The elliptic flow, de2098a0b323cdcab5" title="Click to view the MathML source">v2den">de">v2, of muons from heavy-flavour hadron decays at forward rapidity (2.5<y<4den">de">2.5<y<4) is measured in Pb–Pb collisions at View the MathML sourceden">de">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 de2098a0b323cdcab5" title="Click to view the MathML source">v2den">de">v2 of muons from heavy-flavour hadron decays on the collision centrality, in the range 0–40%, and on transverse momentum, pTden">de">pT, is studied in the interval 3<pT<10 GeV/cden">de">3<pT<10 GeV/c. A positive de2098a0b323cdcab5" title="Click to view the MathML source">v2den">de">v2 is observed with the scalar product and two-particle Q   cumulants in semi-central collisions (10–20% and 20–40% centrality classes) for the pTden">de">pT interval from 3 to about 5 GeV/cden">de">5 GeV/c with a significance larger than 3σ  , based on the combination of statistical and systematic uncertainties. The de2098a0b323cdcab5" title="Click to view the MathML source">v2den">de">v2 magnitude tends to decrease towards more central collisions and with increasing pTden">de">pT. It becomes compatible with zero in the interval 6<pT<10 GeV/cden">de">6<pT<10 GeV/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.

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