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Investigations of anisotropic flow using multi-particle azimuthal correlations in pp, p-Pb, Xe-Xe, and Pb-Pb collisions at the LHC

The ALICE collaboration
No Journal Information, 2019

Abstract (data abstract)
We report measurements of anisotropic flow coefficients ($v_n$) and their cross-correlations using two- and multi-particle cumulant methods in collisions of pp at $\sqrt{s} = 13$ TeV, p--Pb at $\sqrt{s_{_{\rm NN}}} = 5.02$ TeV, Xe--Xe at $\sqrt{s_{_{\rm NN}}} = 5.44$ TeV, and Pb--Pb at $\sqrt{s_{_{\rm NN}}} = 5.02$ TeV recorded with the ALICE detector. These measurements are performed as a function of multiplicity in the mid-rapidity region $|\eta|<0.8$ for the transverse momentum range $0.2 < p_{\rm T} < 3.0$ GeV/$c$. An ordering of the coefficients $v_2 > v_3 > v_4$ is found in pp and \pPb\ collisions, similar to that seen in large collision systems, while a weak $v_2$ multiplicity dependence is observed relative to nucleus-nucleus collisions in the same multiplicity range. Using the novel subevent method, $v_{2}$ measured in pp and \pPb\ collisions with four-particle cumulants is found to be compatible with that from six-particle cumulants. We also present the symmetric cumulants $SC(m,n)$ calculated with the subevent method which evaluate the correlation strength between $v_n^2$ and $v_m^2$. The presented data, which add further support to the existence of long-range multi-particle azimuthal correlations in high multiplicity pp and \pPb\ collisions, can neither be described by PYTHIA8 nor by IP-Glasma+MUSIC+UrQMD model calculations, and hence provide new constraints on collective effects in small collision systems.

  • Table 1

    Data from Fig. 1 (a)

    10.17182/hepdata.90955.v1/t1

    $v_2\{2\}$ with $|\Delta \eta| > 1.4$ in pp collisions at $\sqrt{s} = 13$ TeV.

  • Table 2

    Data from Fig. 1 (b)

    10.17182/hepdata.90955.v1/t2

    $v_3\{2\}$ with $|\Delta \eta| > 1.0$ in pp collisions at $\sqrt{s} = 13$ TeV.

  • Table 3

    Data from Fig. 1 (c)

    10.17182/hepdata.90955.v1/t3

    $v_4\{2\}$ with $|\Delta \eta| > 1.0$ in pp collisions at $\sqrt{s} = 13$ TeV.

  • Table 4

    Data from Fig. 1 (d)

    10.17182/hepdata.90955.v1/t4

    $v_2\{4\}$ with 3-subevent method in pp collisions at $\sqrt{s} = 13$ TeV.

  • Table 5

    Data from Fig. 1 (d)

    10.17182/hepdata.90955.v1/t5

    $v_2\{6\}$ in pp collisions at $\sqrt{s} = 13$ TeV.

  • Table 6

    Data from Fig. 2 (a)

    10.17182/hepdata.90955.v1/t6

    SC$(4,2)$ with 3-subevent method in pp collisions at $\sqrt{s} = 13$ TeV.

  • Table 7

    Data from Fig. 2 (c)

    10.17182/hepdata.90955.v1/t7

    SC$(3,2)$ with 3-subevent method in pp collisions at $\sqrt{s} = 13$ TeV.

  • Table 8

    Data from Fig. 2 (b)

    10.17182/hepdata.90955.v1/t8

    SC$(4,2)$ with 3-subevent method divided with $\langle v_4\{2\}^2\rangle\langle v_2\{2\}^2\rangle$ with $|\Delta \eta| > 1.0$ and 1.4 in pp collisions at...

  • Table 9

    Data from Fig. 2 (d)

    10.17182/hepdata.90955.v1/t9

    SC$(3,2)$ with 3-subevent method divided with $\langle v_3\{2\}^2\rangle\langle v_2\{2\}^2\rangle$ with $|\Delta \eta| > 1.0$ and 1.4 in pp collisions at...

  • Table 10

    Data from Fig. 1 (a)

    10.17182/hepdata.90955.v1/t10

    $v_2\{2\}$ with $|\Delta \eta| > 1.4$ in p-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.

  • Table 11

    Data from Fig. 1 (b)

    10.17182/hepdata.90955.v1/t11

    $v_3\{2\}$ with $|\Delta \eta| > 1.0$ in p-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.

  • Table 12

    Data from Fig. 1 (c)

    10.17182/hepdata.90955.v1/t12

    $v_4\{2\}$ with $|\Delta \eta| > 1.0$ in p-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.

  • Table 13

    Data from Fig. 1 (d)

    10.17182/hepdata.90955.v1/t13

    $v_2\{4\}$ in p-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.

  • Table 14

    Data from Fig. 1 (d)

    10.17182/hepdata.90955.v1/t14

    $v_2\{4\}$ with 3-subevent method in p-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.

  • Table 15

    Data from Fig. 1 (d)

    10.17182/hepdata.90955.v1/t15

    $v_2\{6\}$ in p-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.

  • Table 16

    Data from Fig. 2 (a)

    10.17182/hepdata.90955.v1/t16

    SC$(4,2)$ with 3-subevent method in p-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.

  • Table 17

    Data from Fig. 2 (c)

    10.17182/hepdata.90955.v1/t17

    SC$(3,2)$ with 3-subevent method in p-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.

  • Table 18

    Data from Fig. 2 (b)

    10.17182/hepdata.90955.v1/t18

    SC$(4,2)$ with 3-subevent method divided with $\langle v_4\{2\}^2\rangle\langle v_2\{2\}^2\rangle$ with $|\Delta \eta| > 1.0$ and 1.4 in p-Pb collisions at...

  • Table 19

    Data from Fig. 2 (d)

    10.17182/hepdata.90955.v1/t19

    SC$(3,2)$ with 3-subevent method divided with $\langle v_3\{2\}^2\rangle\langle v_2\{2\}^2\rangle$ with $|\Delta \eta| > 1.0$ and 1.4 in p-Pb collisions at...

  • Table 20

    Data from Fig. 1 (a)

    10.17182/hepdata.90955.v1/t20

    $v_2\{2\}$ with $|\Delta \eta| > 1.4$ in Xe-Xe collisions at $\sqrt{s_{NN}} = 5.44$ TeV.

  • Table 21

    Data from Fig. 1 (b)

    10.17182/hepdata.90955.v1/t21

    $v_3\{2\}$ with $|\Delta \eta| > 1.0$ in Xe-Xe collisions at $\sqrt{s_{NN}} = 5.44$ TeV.

  • Table 22

    Data from Fig. 1 (c)

    10.17182/hepdata.90955.v1/t22

    $v_4\{2\}$ with $|\Delta \eta| > 1.0$ in Xe-Xe collisions at $\sqrt{s_{NN}} = 5.44$ TeV.

  • Table 23

    Data from Fig. 1 (d)

    10.17182/hepdata.90955.v1/t23

    $v_2\{4\}$ in Xe-Xe collisions at $\sqrt{s_{NN}} = 5.44$ TeV.

  • Table 24

    Data from Fig. 1 (d)

    10.17182/hepdata.90955.v1/t24

    $v_2\{4\}$ with 3-subevent method in Xe-Xe collisions at $\sqrt{s_{NN}} = 5.44$ TeV.

  • Table 25

    Data from Fig. 1 (d)

    10.17182/hepdata.90955.v1/t25

    $v_2\{6\}$ in Xe-Xe collisions at $\sqrt{s_{NN}} = 5.44$ TeV.

  • Table 26

    Data from Fig. 1 (d)

    10.17182/hepdata.90955.v1/t26

    $v_2\{8\}$ in Xe-Xe collisions at $\sqrt{s_{NN}} = 5.44$ TeV.

  • Table 27

    Data from Fig. 2 (a)

    10.17182/hepdata.90955.v1/t27

    SC$(4,2)$ with 3-subevent method in Xe-Xe collisions at $\sqrt{s_{NN}} = 5.44$ TeV.

  • Table 28

    Data from Fig. 2 (c)

    10.17182/hepdata.90955.v1/t28

    SC$(3,2)$ with 3-subevent method in Xe-Xe collisions at $\sqrt{s_{NN}} = 5.44$ TeV.

  • Table 29

    Data from Fig. 2 (b)

    10.17182/hepdata.90955.v1/t29

    SC$(4,2)$ with 3-subevent method divided with $\langle v_4\{2\}^2\rangle\langle v_2\{2\}^2\rangle$ with $|\Delta \eta| > 1.0$ and 1.4 in Xe-Xe collisions at...

  • Table 30

    Data from Fig. 2 (d)

    10.17182/hepdata.90955.v1/t30

    SC$(3,2)$ with 3-subevent method divided with $\langle v_3\{2\}^2\rangle\langle v_2\{2\}^2\rangle$ with $|\Delta \eta| > 1.0$ and 1.4 in Xe-Xe collisions at...

  • Table 31

    Data from Fig. 1 (a)

    10.17182/hepdata.90955.v1/t31

    $v_2\{2\}$ with $|\Delta \eta| > 1.4$ in Pb-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.

  • Table 32

    Data from Fig. 1 (b)

    10.17182/hepdata.90955.v1/t32

    $v_3\{2\}$ with $|\Delta \eta| > 1.0$ in Pb-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.

  • Table 33

    Data from Fig. 1 (c)

    10.17182/hepdata.90955.v1/t33

    $v_4\{2\}$ with $|\Delta \eta| > 1.0$ in Pb-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.

  • Table 34

    Data from Fig. 1 (d)

    10.17182/hepdata.90955.v1/t34

    $v_2\{4\}$ in Pb-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.

  • Table 35

    Data from Fig. 1 (d)

    10.17182/hepdata.90955.v1/t35

    $v_2\{4\}$ with 3-subevent method in Pb-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.

  • Table 36

    Data from Fig. 1 (d)

    10.17182/hepdata.90955.v1/t36

    $v_2\{6\}$ in Pb-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.

  • Table 37

    Data from Fig. 1 (d)

    10.17182/hepdata.90955.v1/t37

    $v_2\{6\}$ with 2-subevent method in Pb-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.

  • Table 38

    Data from Fig. 1 (d)

    10.17182/hepdata.90955.v1/t38

    $v_2\{8\}$ in Pb-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.

  • Table 39

    Data from Fig. 1 (d)

    10.17182/hepdata.90955.v1/t39

    $v_2\{8\}$ with 2-subevent method in Pb-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.

  • Table 40

    Data from Fig. 2 (a)

    10.17182/hepdata.90955.v1/t40

    SC$(4,2)$ with 3-subevent method in Pb-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.

  • Table 41

    Data from Fig. 2 (c)

    10.17182/hepdata.90955.v1/t41

    SC$(3,2)$ with 3-subevent method in Pb-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.

  • Table 42

    Data from Fig. 2 (b)

    10.17182/hepdata.90955.v1/t42

    SC$(4,2)$ with 3-subevent method divided with $\langle v_4\{2\}^2\rangle\langle v_2\{2\}^2\rangle$ with $|\Delta \eta| > 1.0$ and 1.4 in Pb-Pb collisions at...

  • Table 43

    Data from Fig. 2 (d)

    10.17182/hepdata.90955.v1/t43

    SC$(3,2)$ with 3-subevent method divided with $\langle v_3\{2\}^2\rangle\langle v_2\{2\}^2\rangle$ with $|\Delta \eta| > 1.0$ and 1.4 in Pb-Pb collisions at...

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