HEPData

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.
https://www.hepdata.net/record/data/64809yaml https://www.hepdata.net/record/data/64809/csvcsv
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.
https://www.hepdata.net/record/data/64810yaml https://www.hepdata.net/record/data/64810/csvcsv
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.
https://www.hepdata.net/record/data/64813yaml https://www.hepdata.net/record/data/64813/csvcsv
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.
https://www.hepdata.net/record/data/64815yaml https://www.hepdata.net/record/data/64815/csvcsv
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....
https://www.hepdata.net/record/data/64817yaml https://www.hepdata.net/record/data/64817/csvcsv
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....
https://www.hepdata.net/record/data/64819yaml https://www.hepdata.net/record/data/64819/csvcsv
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.
https://www.hepdata.net/record/data/64821yaml https://www.hepdata.net/record/data/64821/csvcsv
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.
https://www.hepdata.net/record/data/64824yaml https://www.hepdata.net/record/data/64824/csvcsv
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.
https://www.hepdata.net/record/data/64826yaml https://www.hepdata.net/record/data/64826/csvcsv
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.
https://www.hepdata.net/record/data/64828yaml https://www.hepdata.net/record/data/64828/csvcsv
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....
https://www.hepdata.net/record/data/64830yaml https://www.hepdata.net/record/data/64830/csvcsv
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....
https://www.hepdata.net/record/data/64832yaml https://www.hepdata.net/record/data/64832/csvcsv
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...
https://www.hepdata.net/record/data/64834yaml https://www.hepdata.net/record/data/64834/csvcsv
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...
https://www.hepdata.net/record/data/64836yaml https://www.hepdata.net/record/data/64836/csvcsv
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...
https://www.hepdata.net/record/data/64838yaml https://www.hepdata.net/record/data/64838/csvcsv
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.
https://www.hepdata.net/record/data/64839yaml https://www.hepdata.net/record/data/64839/csvcsv
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.
https://www.hepdata.net/record/data/64841yaml https://www.hepdata.net/record/data/64841/csvcsv
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.
https://www.hepdata.net/record/data/64843yaml https://www.hepdata.net/record/data/64843/csvcsv
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.
https://www.hepdata.net/record/data/64844yaml https://www.hepdata.net/record/data/64844/csvcsv
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.
https://www.hepdata.net/record/data/64845yaml https://www.hepdata.net/record/data/64845/csvcsv
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.
https://www.hepdata.net/record/data/64846yaml https://www.hepdata.net/record/data/64846/csvcsv
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.
https://www.hepdata.net/record/data/64847yaml https://www.hepdata.net/record/data/64847/csvcsv
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.
https://www.hepdata.net/record/data/64848yaml https://www.hepdata.net/record/data/64848/csvcsv
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.
https://www.hepdata.net/record/data/64849yaml https://www.hepdata.net/record/data/64849/csvcsv
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.
https://www.hepdata.net/record/data/64850yaml https://www.hepdata.net/record/data/64850/csvcsv
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.
https://www.hepdata.net/record/data/64851yaml https://www.hepdata.net/record/data/64851/csvcsv
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.
https://www.hepdata.net/record/data/64852yaml https://www.hepdata.net/record/data/64852/csvcsv
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.
https://www.hepdata.net/record/data/64853yaml https://www.hepdata.net/record/data/64853/csvcsv
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.
https://www.hepdata.net/record/data/64854yaml https://www.hepdata.net/record/data/64854/csvcsv
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.
https://www.hepdata.net/record/data/64855yaml https://www.hepdata.net/record/data/64855/csvcsv
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.
https://www.hepdata.net/record/data/64856yaml https://www.hepdata.net/record/data/64856/csvcsv

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