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Multipion Bose-Einstein correlations in pp,p -Pb, and Pb-Pb collisions at energies available at the CERN Large Hadron Collider

The ALICE collaboration
Phys.Rev. C93 (2016) 054908, 2016

Abstract (data abstract)
CERN-LHC. Three- and four-pion Bose-Einstein correlations are presented in pp, p-Pb, and Pb-Pb collisions at the LHC. We compare our measured four-pion correlations to the expectation derived from two- and three-pion measurements. Such a comparison provides a method to search for coherent pion emission. We also present mixed-charge correlations in order to demonstrate the effectiveness of several analysis procedures such as Coulomb corrections. Same-charge four-pion correlations in pp and p-Pb appear consistent with the expectations from three-pion measurements. However, the presence of non-negligible background correlations in both systems prevent a conclusive statement. In Pb-Pb collisions, we observe a significant suppression of three- and four-pion Bose-Einstein correlations compared to expectations from two-pion measurements. There appears to be no centrality dependence of the suppression within the 0-50% centrality interval. The origin of the suppression is not clear. However, by postulating either coherent pion emission or large multibody Coulomb effects, the suppression may be explained.

  • Table 1

    Data from Figure 1a

    10.17182/hepdata.72937.v1/t1

    Mixed charge (- - - +) C4QS, a4QS, c4QS at low KT4 in pp collisions projected against Q4.

  • Table 2

    Data from Figure 1b

    10.17182/hepdata.72937.v1/t2

    Mixed charge (- - - +) C4QS, a4QS, c4QS at high KT4 in pp collisions projected against Q4.

  • Table 3

    Data from Figure 1c

    10.17182/hepdata.72937.v1/t3

    Mixed charge (- - - +) C4QS, a4QS, c4QS at low KT4 in pPb collisions projected against Q4.

  • Table 4

    Data from Figure 1d

    10.17182/hepdata.72937.v1/t4

    Mixed charge (- - - +) C4QS, a4QS, c4QS at high KT4 in pPb collisions projected against Q4.

  • Table 5

    Data from Figure 1e

    10.17182/hepdata.72937.v1/t5

    Mixed charge (- - - +) C4QS, a4QS, c4QS at low KT4 in PbPb collisions projected against Q4. 0-5% Centrality....

  • Table 6

    Data from Figure 1f

    10.17182/hepdata.72937.v1/t6

    Mixed charge (- - - +) C4QS, a4QS, c4QS at high KT4 in PbPb collisions projected against Q4. 0-5% Centrality....

  • Table 7

    Data from Figure 2a

    10.17182/hepdata.72937.v1/t7

    Mixed charge (- - + +) C4QS, a4QS, c4QS at low KT4 in pp collisions projected against Q4.

  • Table 8

    Data from Figure 2b

    10.17182/hepdata.72937.v1/t8

    Mixed charge (- - + +) C4QS, a4QS, c4QS at high KT4 in pp collisions projected against Q4.

  • Table 9

    Data from Figure 2c

    10.17182/hepdata.72937.v1/t9

    Mixed charge (- - + +) C4QS, a4QS, c4QS at low KT4 in pPb collisions projected against Q4.

  • Table 10

    Data from Figure 2d

    10.17182/hepdata.72937.v1/t10

    Mixed charge (- - + +) C4QS, a4QS, c4QS at high KT4 in pPb collisions projected against Q4.

  • Table 11

    Data from Figure 2e

    10.17182/hepdata.72937.v1/t11

    Mixed charge (- - + +) C4QS, a4QS, c4QS at low KT4 in PbPb collisions projected against Q4. 0-5% Centrality....

  • Table 12

    Data from Figure 2f

    10.17182/hepdata.72937.v1/t12

    Mixed charge (- - + +) C4QS, a4QS, c4QS at high KT4 in PbPb collisions projected against Q4. 0-5% Centrality....

  • Table 13

    Data from Figure 3a

    10.17182/hepdata.72937.v1/t13

    Same charge C3QS, and c3QS at low KT3 in pp collisions projected against Q3. 0-5% Centrality. Edgeworth parameters for the...

  • Table 14

    Data from Figure 3b

    10.17182/hepdata.72937.v1/t14

    Same charge C3QS, and c3QS at low KT3 in pPb collisions projected against Q3. 0-5% Centrality. Edgeworth parameters for the...

  • Table 15

    Data from Figure 3c

    10.17182/hepdata.72937.v1/t15

    Same charge C3QS, and c3QS at low KT3 in PbPb collisions projected against Q3. 0-5% Centrality. Edgeworth parameters for the...

  • Table 16

    Data from Figure 4a (measured correlations and ratios)

    10.17182/hepdata.72937.v1/t16

    Same charge C4QS, a4QS, b4QS, c4QS, and ratios in pp collisions projected against Q4.

  • Table 17

    Data from Figure 4a (expected correlations)

    10.17182/hepdata.72937.v1/t17

    Same charge 4-pion expected correlations in pp collisions projected against Q4.

  • Table 18

    Data from Figure 4b (measured correlations and ratios)

    10.17182/hepdata.72937.v1/t18

    Same charge C4QS, a4QS, b4QS, c4QS, and ratios in pPb collisions projected against Q4.

  • Table 19

    Data from Figure 4b (expected correlations)

    10.17182/hepdata.72937.v1/t19

    Same charge 4-pion expected correlations in pPb collisions projected against Q4.

  • Table 20

    Data from Figure 4c (measured correlations and ratios)

    10.17182/hepdata.72937.v1/t20

    Same charge C4QS, a4QS, b4QS, c4QS, and ratios in PbPb collisions projected against Q4. 0-5% Centrality.

  • Table 21

    Data from Figure 4c (expected correlations)

    10.17182/hepdata.72937.v1/t21

    Same charge 4-pion expected correlations in PbPb collisions projected against Q4. 0-5% Centrality.

  • Table 22

    Data from Figure 5a

    10.17182/hepdata.72937.v1/t22

    Same charge 3-pion measured and expected correlations at low KT3 in PbPb collisions projected against Q3. 0-5% Centrality.

  • Table 23

    Data from Figure 5b

    10.17182/hepdata.72937.v1/t23

    Same charge 3-pion measured and expected correlations at high KT3 in PbPb collisions projected against Q3. 0-5% Centrality.

  • Table 24

    Data from Figure 6a (measured correlations and ratio)

    10.17182/hepdata.72937.v1/t24

    Same charge 4-pion measured correlations and ratio at low KT4 in PbPb collisions projected against Q4. 0-5% Centrality.

  • Table 25

    Data from Figure 6a (expected correlations)

    10.17182/hepdata.72937.v1/t25

    Same charge 4-pion expected correlations at low KT4 in PbPb collisions projected against Q4. 0-5% Centrality.

  • Table 26

    Data from Figure 6b (measured correlations and ratio)

    10.17182/hepdata.72937.v1/t26

    Same charge 4-pion measured correlations and ratio at high KT4 in PbPb collisions projected against Q4. 0-5% Centrality.

  • Table 27

    Data from Figure 6b (expected correlations)

    10.17182/hepdata.72937.v1/t27

    Same charge 4-pion expected correlations at high KT4 in PbPb collisions projected against Q4. 0-5% Centrality.

  • Table 28

    Data from Figure 7

    10.17182/hepdata.72937.v1/t28

    Same charge 4-pion expected correlations and ratio at low KT4 in PbPb collisions projected against Q4. 0-5% Centrality.

  • Table 29

    Data from Figure 8

    10.17182/hepdata.72937.v1/t29

    Same charge 3-pion expected correlations and ratio at low KT3 in PbPb collisions projected against Q3. 0-5% Centrality.

  • Table 30

    Data from Figures 9a and 9b

    10.17182/hepdata.72937.v1/t30

    Coherent fractions (G) extracted from 4-pion correlations versus centrality for low and high KT4 in PbPb collisions.

  • Table 31

    Data from Public note figures 4a and 4b

    10.17182/hepdata.72937.v1/t31

    Three-pion mixed-charge cumulant correlation functions for low and high KT3 in PbPb collisions.

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