• Browse all
Measurement of long-range multiparticle azimuthal correlations with the subevent cumulant method in $pp$ and $p + Pb$ collisions with the ATLAS detector at the CERN Large Hadron Collider

The collaboration
Phys.Rev.C 97 (2018) 024904, 2018.

Abstract
A detailed study of multi-particle azimuthal correlations is presented using $pp$ data at $\sqrt{s}=5.02$ and 13 TeV, and $p$+Pb data at $\sqrt{s_{\rm{NN}}}=5.02$ TeV, recorded with the ATLAS detector at the LHC. The azimuthal correlations are probed using four-particle cumulants $c_{n}\{4\}$ and flow coefficients $v_n\{4\}=(-c_{n}\{4\})^{1/4}$ for $n=2$ and 3, with the goal of extracting long-range multi-particle azimuthal correlation signals and suppressing the short-range correlations. The values of $c_{n}\{4\}$ are obtained as a function of the average number of charged particles per event, $\left\langle N_{\rm{ch}} \right\rangle$, using the recently proposed two-subevent and three-subevent cumulant methods, and compared with results obtained with the standard cumulant method. The three-subevent method is found to be least sensitive to short-range correlations, which originate mostly from jets with a positive contribution to $c_{n}\{4\}$. The three-subevent method gives a negative $c_{2}\{4\}$, and therefore a well-defined $v_2\{4\}$, nearly independent of $\left\langle N_{\rm{ch}} \right\rangle$, which provides direct evidence that the long-range multi-particle azimuthal correlations persist to events with low multiplicity. Furthermore, $v_2\{4\}$ is found to be smaller than the $v_2\{2\}$ measured using the two-particle correlation method, as expected for long-range collective behavior. Finally, the measured values of $v_2\{4\}$ and $v_2\{2\}$ are used to estimate the number of sources relevant for the initial eccentricity in the collision geometry.

• #### Figure 1a-0

Data from Page 10 of preprint

10.17182/hepdata.82287.v1/t1

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the standard cumulant method from...

• #### Figure 1a-1

Data from Page 10 of preprint

10.17182/hepdata.82287.v1/t2

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the standard cumulant method from...

• #### Figure 1a-2

Data from Page 10 of preprint

10.17182/hepdata.82287.v1/t3

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the standard cumulant method from...

• #### Figure 1a-3

Data from Page 10 of preprint

10.17182/hepdata.82287.v1/t4

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the standard cumulant method from...

• #### Figure 1b-0

Data from Page 10 of preprint

10.17182/hepdata.82287.v1/t5

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the standard cumulant method from...

• #### Figure 1b-1

Data from Page 10 of preprint

10.17182/hepdata.82287.v1/t6

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the standard cumulant method from...

• #### Figure 1b-2

Data from Page 10 of preprint

10.17182/hepdata.82287.v1/t7

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the standard cumulant method from...

• #### Figure 1b-3

Data from Page 10 of preprint

10.17182/hepdata.82287.v1/t8

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the standard cumulant method from...

• #### Figure 2a-0

Data from Page 10 of preprint

10.17182/hepdata.82287.v1/t9

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 2-subevent cumulant method from...

• #### Figure 2a-1

Data from Page 10 of preprint

10.17182/hepdata.82287.v1/t10

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 2-subevent cumulant method from...

• #### Figure 2a-2

Data from Page 10 of preprint

10.17182/hepdata.82287.v1/t11

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 2-subevent cumulant method from...

• #### Figure 2a-3

Data from Page 10 of preprint

10.17182/hepdata.82287.v1/t12

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 2-subevent cumulant method from...

• #### Figure 2b-0

Data from Page 10 of preprint

10.17182/hepdata.82287.v1/t13

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 2-subevent cumulant method from...

• #### Figure 2b-1

Data from Page 10 of preprint

10.17182/hepdata.82287.v1/t14

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 2-subevent cumulant method from...

• #### Figure 2b-2

Data from Page 10 of preprint

10.17182/hepdata.82287.v1/t15

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 2-subevent cumulant method from...

• #### Figure 2b-3

Data from Page 10 of preprint

10.17182/hepdata.82287.v1/t16

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 2-subevent cumulant method from...

• #### Figure 3a-0

Data from Page 11 of preprint

10.17182/hepdata.82287.v1/t17

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 3-subevent cumulant method from...

• #### Figure 3a-1

Data from Page 11 of preprint

10.17182/hepdata.82287.v1/t18

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 3-subevent cumulant method from...

• #### Figure 3a-2

Data from Page 11 of preprint

10.17182/hepdata.82287.v1/t19

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 3-subevent cumulant method from...

• #### Figure 3a-3

Data from Page 11 of preprint

10.17182/hepdata.82287.v1/t20

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 3-subevent cumulant method from...

• #### Figure 3b-0

Data from Page 11 of preprint

10.17182/hepdata.82287.v1/t21

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 3-subevent cumulant method from...

• #### Figure 3b-1

Data from Page 11 of preprint

10.17182/hepdata.82287.v1/t22

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 3-subevent cumulant method from...

• #### Figure 3b-2

Data from Page 11 of preprint

10.17182/hepdata.82287.v1/t23

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 3-subevent cumulant method from...

• #### Figure 3b-3

Data from Page 11 of preprint

10.17182/hepdata.82287.v1/t24

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 3-subevent cumulant method from...

• #### Figure 4a-0

Data from Page 11 of preprint

10.17182/hepdata.82287.v1/t25

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the standard cumulant method from...

• #### Figure 4a-1

Data from Page 11 of preprint

10.17182/hepdata.82287.v1/t26

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 2-subevent cumulant method from...

• #### Figure 4a-2

Data from Page 11 of preprint

10.17182/hepdata.82287.v1/t27

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 3-subevent cumulant method from...

• #### Figure 4b-0

Data from Page 11 of preprint

10.17182/hepdata.82287.v1/t28

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the standard cumulant method from...

• #### Figure 4b-1

Data from Page 11 of preprint

10.17182/hepdata.82287.v1/t29

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 2-subevent cumulant method from...

• #### Figure 4b-2

Data from Page 11 of preprint

10.17182/hepdata.82287.v1/t30

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 3-subevent cumulant method from...

• #### Figure 5a-0

Data from Page 12 of preprint

10.17182/hepdata.82287.v1/t31

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the standard cumulant method from...

• #### Figure 5a-1

Data from Page 12 of preprint

10.17182/hepdata.82287.v1/t32

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 2-subevent cumulant method from...

• #### Figure 5a-2

Data from Page 12 of preprint

10.17182/hepdata.82287.v1/t33

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 3-subevent cumulant method from...

• #### Figure 5b-0

Data from Page 12 of preprint

10.17182/hepdata.82287.v1/t34

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the standard cumulant method from...

• #### Figure 5b-1

Data from Page 12 of preprint

10.17182/hepdata.82287.v1/t35

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 2-subevent cumulant method from...

• #### Figure 5b-2

Data from Page 12 of preprint

10.17182/hepdata.82287.v1/t36

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 3-subevent cumulant method from...

• #### Figure 6a-0

Data from Page 12 of preprint

10.17182/hepdata.82287.v1/t37

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the standard cumulant method from...

• #### Figure 6a-1

Data from Page 12 of preprint

10.17182/hepdata.82287.v1/t38

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 2-subevent cumulant method from...

• #### Figure 6a-2

Data from Page 12 of preprint

10.17182/hepdata.82287.v1/t39

The c_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 3-subevent cumulant method from...

• #### Figure 6b-0

Data from Page 12 of preprint

10.17182/hepdata.82287.v1/t40

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the standard cumulant method from...

• #### Figure 6b-1

Data from Page 12 of preprint

10.17182/hepdata.82287.v1/t41

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 2-subevent cumulant method from...

• #### Figure 6b-2

Data from Page 12 of preprint

10.17182/hepdata.82287.v1/t42

The c_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 3-subevent cumulant method from...

• #### Figure 9a-0

Data from Page 14 of preprint

10.17182/hepdata.82287.v1/t43

The c_3{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the standard cumulant method from...

• #### Figure 9a-1

Data from Page 14 of preprint

10.17182/hepdata.82287.v1/t44

The c_3{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the standard cumulant method from...

• #### Figure 9a-2

Data from Page 14 of preprint

10.17182/hepdata.82287.v1/t45

The c_3{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the standard cumulant method from...

• #### Figure 9b-0

Data from Page 14 of preprint

10.17182/hepdata.82287.v1/t46

The c_3{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 3-subevent cumulant method from...

• #### Figure 9b-1

Data from Page 14 of preprint

10.17182/hepdata.82287.v1/t47

The c_3{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 3-subevent cumulant method from...

• #### Figure 9b-2

Data from Page 14 of preprint

10.17182/hepdata.82287.v1/t48

The c_3{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 3-subevent cumulant method from...

• #### Figure 10a-0

Data from Page 14 of preprint

10.17182/hepdata.82287.v1/t49

The c_3{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the standard cumulant method from...

• #### Figure 10a-1

Data from Page 14 of preprint

10.17182/hepdata.82287.v1/t50

The c_3{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the standard cumulant method from...

• #### Figure 10a-2

Data from Page 14 of preprint

10.17182/hepdata.82287.v1/t51

The c_3{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the standard cumulant method from...

• #### Figure 10b-0

Data from Page 14 of preprint

10.17182/hepdata.82287.v1/t52

The c_3{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 3-subevent cumulant method from...

• #### Figure 10b-1

Data from Page 14 of preprint

10.17182/hepdata.82287.v1/t53

The c_3{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 3-subevent cumulant method from...

• #### Figure 10b-2

Data from Page 14 of preprint

10.17182/hepdata.82287.v1/t54

The c_3{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 3-subevent cumulant method from...

• #### Figure 11a-0

Data from Page 15 of preprint

10.17182/hepdata.82287.v1/t55

The c_3{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 3-subevent cumulant method from...

• #### Figure 11a-1

Data from Page 15 of preprint

10.17182/hepdata.82287.v1/t56

The c_3{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 3-subevent cumulant method from...

• #### Figure 11a-2

Data from Page 15 of preprint

10.17182/hepdata.82287.v1/t57

The c_3{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 3-subevent cumulant method from...

• #### Figure 11a-3

Data from Page 15 of preprint

10.17182/hepdata.82287.v1/t58

The c_3{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 3-subevent cumulant method from...

• #### Figure 11b-0

Data from Page 15 of preprint

10.17182/hepdata.82287.v1/t59

The c_3{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 3-subevent cumulant method from...

• #### Figure 11b-1

Data from Page 15 of preprint

10.17182/hepdata.82287.v1/t60

The c_3{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 3-subevent cumulant method from...

• #### Figure 11b-2

Data from Page 15 of preprint

10.17182/hepdata.82287.v1/t61

The c_3{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 3-subevent cumulant method from...

• #### Figure 11b-3

Data from Page 15 of preprint

10.17182/hepdata.82287.v1/t62

The c_3{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 3-subevent cumulant method from...

• #### Figure 12a

Data from Page 16 of preprint

10.17182/hepdata.82287.v1/t63

The v_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 3-subevent cumulant method from...

• #### Figure 12b

Data from Page 16 of preprint

10.17182/hepdata.82287.v1/t64

The v_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 3-subevent cumulant method from...

• #### Figure 12c

Data from Page 16 of preprint

10.17182/hepdata.82287.v1/t65

The v_2{4} values calculated for charged particles with 0.3 < pT < 3 GeV with the 3-subevent cumulant method from...

• #### Figure 13a

Data from Page 16 of preprint

10.17182/hepdata.82287.v1/t66

The v_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 3-subevent cumulant method from...

• #### Figure 13b

Data from Page 16 of preprint

10.17182/hepdata.82287.v1/t67

The v_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 3-subevent cumulant method from...

• #### Figure 13c

Data from Page 16 of preprint

10.17182/hepdata.82287.v1/t68

The v_2{4} values calculated for charged particles with 0.5 < pT < 5 GeV with the 3-subevent cumulant method from...

• #### Figure 14a-0

Data from Page 17 of preprint

10.17182/hepdata.82287.v1/t69

The N_s calculated for charged particles with 0.3 < pT < 3 GeV with the 3-subevent cumulant method from the...

• #### Figure 14a-1

Data from Page 17 of preprint

10.17182/hepdata.82287.v1/t70

The N_s values calculated for charged particles with 0.3 < pT < 3 GeV with the 3-subevent cumulant method from...

• #### Figure 14b-0

Data from Page 17 of preprint

10.17182/hepdata.82287.v1/t71

The N_s values calculated for charged particles with 0.5 < pT < 5 GeV with the 3-subevent cumulant method from...

• #### Figure 14b-1

Data from Page 17 of preprint

10.17182/hepdata.82287.v1/t72

The N_s values calculated for charged particles with 0.5 < pT < 5 GeV with the 3-subevent cumulant method from...