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Elliptic flow of charm and strange hadrons in high-multiplicity pPb collisions at $\sqrt{s_{_\mathrm{NN}}} =$ 8.16 TeV

The CMS collaboration
Phys.Rev.Lett. 121 (2018) 082301, 2018.

Abstract
The elliptic azimuthal anisotropy coefficient ($v_2$) is measured for charm (D$^0$) and strange (K$_\mathrm{S}^0$, $\Lambda$, $\Xi^-$, and $\Omega^-$) hadrons, using a data sample of pPb collisions collected by the CMS experiment, at a nucleon-nucleon center-of-mass energy $\sqrt{s_{_\mathrm{NN}}} =$ 8.16 TeV. A significant positive $v_2$ signal from long-range azimuthal correlations is observed for all particle species in high-multiplicity pPb collisions. The measurement represents the first observation of possible long-range collectivity for open heavy flavor hadrons in small systems. The results suggest that charm quarks have a smaller $v_2$ than the lighter quarks, probably reflecting a weaker collective behavior. This effect is not seen in the larger PbPb collision system at $\sqrt{s_{_\mathrm{NN}}} =$ 5.02 TeV, also presented.

  • Table 1

    Data from Figure 2

    10.17182/hepdata.83911.v1/t1

    The elliptic flow, $v_{2}$, for $K^{0}_{S}$ as a function of $p_{T}$ in pPb collision at 8.16 TeV.

  • Table 2

    Data from Figure 2

    10.17182/hepdata.83911.v1/t2

    The elliptic flow, $v_{2}$, for $\Lambda$ as a function of $p_{T}$ in pPb collision at 8.16 TeV.

  • Table 3

    Data from Figure 2

    10.17182/hepdata.83911.v1/t3

    The elliptic flow, $v_{2}$, for $\Xi^{-}$ as a function of $p_{T}$ in pPb collision at 8.16 TeV.

  • Table 4

    Data from Figure 2

    10.17182/hepdata.83911.v1/t4

    The elliptic flow, $v_{2}$, for $\Omega^{-}$ as a function of $p_{T}$ in pPb collision at 8.16 TeV.

  • Table 5

    Data from Figure 2

    10.17182/hepdata.83911.v1/t5

    The elliptic flow, $v_{2}$, for $D^{0}$ mesons as a function of $p_{T}$ in pPb collision at 8.16 TeV.

  • Table 6

    Data from Figure 3

    10.17182/hepdata.83911.v1/t6

    The elliptic flow after correcting back-to-back jet contribution, $v_{2}^{sub}$, for $K^{0}_{S}$ as a function of $p_{T}$ in pPb collision at...

  • Table 7

    Data from Figure 3

    10.17182/hepdata.83911.v1/t7

    The elliptic flow after correcting back-to-back jet contribution, $v_{2}^{sub}$, for $\Lambda$ as a function of $p_{T}$ in pPb collision at...

  • Table 8

    Data from Figure 3

    10.17182/hepdata.83911.v1/t8

    The elliptic flow after correcting back-to-back jet contribution, $v_{2}^{sub}$, for $\Xi^{-}$ as a function of $p_{T}$ in pPb collision at...

  • Table 9

    Data from Figure 3

    10.17182/hepdata.83911.v1/t9

    The elliptic flow after correcting back-to-back jet contribution, $v_{2}^{sub}$, for $\Omega^{-}$ as a function of $p_{T}$ in pPb collision at...

  • Table 10

    Data from Figure 3

    10.17182/hepdata.83911.v1/t10

    The elliptic flow after correcting back-to-back jet contribution, $v_{2}^{sub}$, for $D^{0}$ mesons as a function of $p_{T}$ in pPb collision...

  • Table 11

    Data from Figure 3

    10.17182/hepdata.83911.v1/t11

    The elliptic flow per constituent quark after correcting back-to-back jet contribution, $v_{2}^{sub}/n_{q}$, for $K^{0}_{S}$ as a function of transverse kinetic...

  • Table 12

    Data from Figure 3

    10.17182/hepdata.83911.v1/t12

    The elliptic flow per constituent quark after correcting back-to-back jet contribution, $v_{2}^{sub}/n_{q}$, for $\Lambda$ as a function of transverse kinetic...

  • Table 13

    Data from Figure 3

    10.17182/hepdata.83911.v1/t13

    The elliptic flow per constituent quark after correcting back-to-back jet contribution, $v_{2}^{sub}/n_{q}$, for $\Xi^{-}$ as a function of transverse kinetic...

  • Table 14

    Data from Figure 3

    10.17182/hepdata.83911.v1/t14

    The elliptic flow per constituent quark after correcting back-to-back jet contribution, $v_{2}^{sub}/n_{q}$, for $\Omega^{-}$ as a function of transverse kinetic...

  • Table 15

    Data from Figure 3

    10.17182/hepdata.83911.v1/t15

    The elliptic flow per constituent quark after correcting back-to-back jet contribution, $v_{2}^{sub}/n_{q}$, for $D^{0}$ meson as a function of transverse...

  • Table 16

    Data from Figure 3

    10.17182/hepdata.83911.v1/t16

    The elliptic flow after correcting back-to-back jet contribution, $v_{2}^{sub}$, for $K^{0}_{S}$ as a function of $p_{T}$ in PbPb collision at...

  • Table 17

    Data from Figure 3

    10.17182/hepdata.83911.v1/t17

    The elliptic flow after correcting back-to-back jet contribution, $v_{2}^{sub}$, for $\Lambda$ as a function of $p_{T}$ in PbPb collision at...

  • Table 18

    Data from Figure 3

    10.17182/hepdata.83911.v1/t18

    The elliptic flow after correcting back-to-back jet contribution, $v_{2}^{sub}$, for $\Xi^{-}$ as a function of $p_{T}$ in PbPb collision at...

  • Table 19

    Data from Figure 3

    10.17182/hepdata.83911.v1/t19

    The elliptic flow after correcting back-to-back jet contribution, $v_{2}^{sub}$, for $\Omega^{-}$ as a function of $p_{T}$ in PbPb collision at...

  • Table 20

    Data from Figure 3

    10.17182/hepdata.83911.v1/t20

    The elliptic flow per constituent quark after correcting back-to-back jet contribution, $v_{2}^{sub}/n_{q}$, for $K^{0}_{S}$ as a function of transverse kinetic...

  • Table 21

    Data from Figure 3

    10.17182/hepdata.83911.v1/t21

    The elliptic flow per constituent quark after correcting back-to-back jet contribution, $v_{2}^{sub}/n_{q}$, for $\Lambda$ as a function of transverse kinetic...

  • Table 22

    Data from Figure 3

    10.17182/hepdata.83911.v1/t22

    The elliptic flow per constituent quark after correcting back-to-back jet contribution, $v_{2}^{sub}/n_{q}$, for $\Xi^{-}$ as a function of transverse kinetic...

  • Table 23

    Data from Figure 3

    10.17182/hepdata.83911.v1/t23

    The elliptic flow per constituent quark after correcting back-to-back jet contribution, $v_{2}^{sub}/n_{q}$, for $\Omega^{-}$ as a function of transverse kinetic...

  • Table 24

    Data from Figure 3

    10.17182/hepdata.83911.v1/t24

    The elliptic flow per constituent quark after correcting back-to-back jet contribution, $v_{2}^{sub}/n_{q}$, for $D^{0}$ meson as a function of transverse...

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