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Relative particle yield fluctuations in Pb-Pb collisions at ${\mathbf{\sqrt{s_{\rm NN}}=2.76}}$ TeV

The ALICE collaboration
Eur.Phys.J., 2017

Abstract (data abstract)
CERN-LHC. First results on K/pi, p/pi and K/p fluctuations are obtained with the ALICE detector at the CERN LHC as a function of centrality in Pb--Pb collisions at sqrt(s) = 2.76. The observable nu_dyn, which is defined in terms of the moments of particle multiplicity distributions, is used to quantify the magnitude of dynamical fluctuations of relative particle yields and also provides insight into the correlation between particle pairs. This study is based on a novel experimental technique, called the Identity Method, which allows one to measure the moments of multiplicity distributions in case of incomplete particle identification. The results for p/pi show a change of sign in nu_dyn from positive to negative towards more peripheral collisions. For central collisions, the results follow the smooth trend of the data at lower energies and nu_dyn exhibits a change in sign for p/pi and K/p.

  • Table 1

    Data from Figure 4 (red, circle)

    10.17182/hepdata.84281.v1/t1

    Beam-energy dependence of nu_dyn.

  • Table 2

    Data from Figure 4 (red, circle)

    10.17182/hepdata.84281.v1/t2

    Beam-energy dependence of nu_dyn.

  • Table 3

    Data from Figure 4 (red, circle)

    10.17182/hepdata.84281.v1/t3

    Beam-energy dependence of nu_dyn.

  • Table 4

    Data from Figure 3 (red, circle)

    10.17182/hepdata.84281.v1/t4

    Centrality dependence of nu_dyn.

  • Table 5

    Data from Figure 3 (red, circle)

    10.17182/hepdata.84281.v1/t5

    Centrality dependence of nu_dyn.

  • Table 6

    Data from Figure 3 (red, circle)

    10.17182/hepdata.84281.v1/t6

    Centrality dependence of nu_dyn.

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