Abstract (data abstract)

The hydrodynamic flow-like behavior of charged hadrons in high-energy lead-lead collisions is studied through multiparticle correlations. The elliptic anisotropy values based on different orders of multiparticle cumulants,

v_{2} {2 k}

, are measured up to the tenth order (

k = 5

) as functions of the collision centrality at a nucleon-nucleon center-of-mass energy of

\sqrt{s_{N N}} = 5.02 Te V

. The data were recorded by the CMS experiment at the LHC and correspond to an integrated luminosity of

0.607 {nb}^{- 1}

. A hierarchy is observed between the coefficients, with

v_{2} {2} > v_{2} {4} ≳ v_{2} {6} ≳ v_{2} {8} ≳ v_{2} {10}

. Based on these results, centrality-dependent moments for the fluctuation-driven event-by-event

v_{2}

distribution are determined, including the skewness, kurtosis and, for the first time, superskewness. Assuming a hydrodynamic expansion of the produced medium, these moments directly probe the initial-state geometry in high-energy nucleus-nucleus collisions.

Figure 2

10.17182/hepdata.132638.v1/t1

The $v_{2} {2 k}$ ( $k = 1, . . ., 5$ ) values as functions of centrality in PbPb collisions at $\sqrt{s_{N N}} = 5.02 Te V$ . The measurement is...
Figure 3

10.17182/hepdata.132638.v1/t2

The relative differences $(v_{2} {2 k} - v_{2} {10}) / v_{2} {10}$ ( $k = 1, . . ., 4$ ) as functions of centrality in PbPb collisions at $\sqrt{s_{N N}} = 5.02 Te V$ . The measurement...
Figure 4

10.17182/hepdata.132638.v1/t3

The $h_{1}$ and the $h_{2}$ hydrodynamic probes as functions of centrality in PbPb collisions at $\sqrt{s_{N N}} = 5.02 Te V$ . The measurement is performed...
Figure 5 (left)

10.17182/hepdata.132638.v1/t4

The ratios between the hydrodynamic probes and their Taylor expansions. The ratios are plotted as functions of centrality in PbPb...
Figure 5 (right)

10.17182/hepdata.132638.v1/t5

The ratios between the hydrodynamic probes and their Taylor expansions. The ratios are plotted as functions of centrality in PbPb...
Figure 6 (upper)

10.17182/hepdata.132638.v1/t6

The magnitudes of the measured skewness $γ_{1}^{exp}$ and "corrected" skewness $γ_{1, corr}^{exp}$ as functions of centrality in PbPb collisions at $\sqrt{s_{N N}} = 5.02 Te V$ ....
Figure 6 (middle)

10.17182/hepdata.132638.v1/t7

The magnitudes of the measured kurtosis $γ_{2}^{exp}$ and "corrected" kurtosis $γ_{2, corr}^{exp}$ as functions of centrality in PbPb collisions at $\sqrt{s_{N N}} = 5.02 Te V$ ....
Figure 6 (lower)

10.17182/hepdata.132638.v1/t8

The magnitudes of the measured superskewness $γ_{3}^{exp}$ and "corrected" superskewness $γ_{3, corr}^{exp}$ as functions of centrality in PbPb collisions at $\sqrt{s_{N N}} = 5.02 Te V$ ....

Figure 2

Figure 3

Figure 4

Figure 5 (left)

Figure 5 (right)

Figure 6 (upper)

Figure 6 (middle)

Figure 6 (lower)

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