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Elliptic flow of muons from heavy-flavour hadron decays at forward rapidity in Pb–Pb collisions at $\sqrt{s_{\rm NN}}= 2.76$ TeV

The ALICE collaboration
Phys.Lett. B753 (2016) 41-56, 2016

Abstract (data abstract)
CERN-LHC. The elliptic flow, $v_{2}$, of muons from heavy-flavour hadron decays at forward rapidity ($2.5<y<4$) is measured in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ 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 $v_{2}$ of muons from heavy-flavour hadron decays on the collision centrality, in the range $0$-$40\%$, and on transverse momentum, $p_{\rm T}$, is studied in the interval $3<p_{\rm T}<10$ GeV/$c$. A positive $v_{2}$ is observed with the scalar product and two-particle $Q$ cumulants in semi-central collisions ($10$-$20$% and $20$-$40$% centrality classes) for the $p_{\rm T}$ interval from $3$ to about $5$ GeV/$c$ with a significance larger than $3\sigma$, based on the combination of statistical and systematic uncertainties. The $v_{2}$ magnitude tends to decrease towards more central collisions and with increasing $p_{ m T}$. It becomes compatible with zero in the interval $6<p_{\rm T}<10$ 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.

  • Table 1

    Data from Figure 1, top left pannel

    10.17182/hepdata.39929.v1/t1

    pT-differential inclusive muon $v_{2}$ extracted with scalar product method.

  • Table 2

    Data from Figure 1, top left pannel

    10.17182/hepdata.39929.v1/t2

    pT-differential inclusive muon $v_{2}$ extracted with two-particle $Q$ cumulants method.

  • Table 3

    Data from Figure 1, top right pannel

    10.17182/hepdata.39929.v1/t3

    pT-differential inclusive muon $v_{2}$ extracted with scalar product method.

  • Table 4

    Data from Figure 1, top right pannel

    10.17182/hepdata.39929.v1/t4

    pT-differential inclusive muon $v_{2}$ extracted with two-particle $Q$ cumulants method.

  • Table 5

    Data from Figure 1, bottom left pannel

    10.17182/hepdata.39929.v1/t5

    pT-differential inclusive muon $v_{2}$ extracted with scalar product method.

  • Table 6

    Data from Figure 1, bottom left pannel

    10.17182/hepdata.39929.v1/t6

    pT-differential inclusive muon $v_{2}$ extracted with two-particle cumulants method.

  • Table 7

    Data from Figure 1, bottom left and bottom right pannels

    10.17182/hepdata.39929.v1/t7

    pT-differential inclusive muon $v_{2}$ extracted with four-particle cumulants method.

  • Table 8

    Data from Figure 1, bottom right pannel

    10.17182/hepdata.39929.v1/t8

    pT-differential inclusive muon $v_{2}$ extracted with Lee-Yang zeros (Sum) method.

  • Table 9

    Data from Figure 1, bottom right pannel

    10.17182/hepdata.39929.v1/t9

    pT-differential inclusive muon $v_{2}$ extracted with Lee-Yang zeros (Prod) method.

  • Table 10

    Data from Figure 3, top left pannel

    10.17182/hepdata.39929.v1/t10

    pT-differential $v_{2}$ of muons from heavy-flavour decays extracted with scalar product method.

  • Table 11

    Data from Figure 3, top left pannel

    10.17182/hepdata.39929.v1/t11

    pT-differential $v_{2}$ of muons from heavy-flavour decays extracted with two-particle $Q$ cumulants method.

  • Table 12

    Data from Figure 3, top right pannel

    10.17182/hepdata.39929.v1/t12

    pT-differential $v_{2}$ of muons from heavy-flavour decays extracted with scalar product method.

  • Table 13

    Data from Figure 3, top right pannel

    10.17182/hepdata.39929.v1/t13

    pT-differential $v_{2}$ of muons from heavy-flavour decays extracted with two-particle $Q$ cumulants method.

  • Table 14

    Data from Figure 3, bottom left pannel

    10.17182/hepdata.39929.v1/t14

    pT-differential $v_{2}$ of muons from heavy-flavour decays extracted with scalar product method.

  • Table 15

    Data from Figure 3, bottom left pannel

    10.17182/hepdata.39929.v1/t15

    pT-differential $v_{2}$ of muons from heavy-flavour decays extracted with two-particle cumulants method.

  • Table 16

    Data from Figure 3, bottom left and bottom right pannels

    10.17182/hepdata.39929.v1/t16

    pT-differential $v_{2}$ of muons from heavy-flavour decays extracted with four-particle cumulants method.

  • Table 17

    Data from Figure 3, bottom right pannel

    10.17182/hepdata.39929.v1/t17

    pT-differential $v_{2}$ of muons from heavy-flavour decays extracted with Lee-Yang zeros (Sum) method.

  • Table 18

    Data from Figure 3, bottom right pannel

    10.17182/hepdata.39929.v1/t18

    pT-differential $v_{2}$ of muons from heavy-flavour decays extracted with Lee-Yang zeros (Prod) method.

  • Table 19

    Data from Figure 4

    10.17182/hepdata.39929.v1/t19

    Elliptic flow of muons from heavy-flavour hadron decays as a function of the collision centrality extracted with scalar product method.

  • Table 20

    Data from Figure 4

    10.17182/hepdata.39929.v1/t20

    Elliptic flow of muons from heavy-flavour hadron decays as a function of the collision centrality extracted with two-particle cumulants method.

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