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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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The elliptic flow, le="Click to view the MathML source">v2, of muons from heavy-flavour hadron decays at forward rapidity (le="Click to view the MathML source">2.5<y<4) is measured in Pb–Pb collisions at le="View the MathML source" class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269315009156&_mathId=si1.gif&_user=111111111&_pii=S0370269315009156&_rdoc=1&_issn=03702693&md5=8065ea62e2341e638520e7e3f068a74f">View the MathML sourcele="margin-top: -5px; vertical-align: middle" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0370269315009156-si1.gif"> 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 le="Click to view the MathML source">v2 of muons from heavy-flavour hadron decays on the collision centrality, in the range 0–40%, and on transverse momentum, le="Click to view the MathML source">pT, is studied in the interval le="Click to view the MathML source">3<pT<10 GeV/c. A positive le="Click to view the MathML source">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 le="Click to view the MathML source">pT interval from 3 to about le="Click to view the MathML source">5 GeV/c with a significance larger than 3σ  , based on the combination of statistical and systematic uncertainties. The le="Click to view the MathML source">v2 magnitude tends to decrease towards more central collisions and with increasing le="Click to view the MathML source">pT. It becomes compatible with zero in the interval le="Click to view the MathML source">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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