HEPData

Abstract (data abstract)

Balance functions have been measured for charged particle pairs, identified charged pion pairs, and identified charged kaon pairs in Au+Au, d+Au, and p+p collisions at $\sqrt{s_{NN}}$ = 200 GeV at the Relativistic Heavy Ion Collider using the STAR detector. These balance functions are presented in terms of relative pseudorapidity, $\Delta \eta$, relative rapidity, $\Delta y$, relative azimuthal angle, $\Delta \phi$, and invariant relative momentum, $q_{inv}$. In addition, balance functions are shown in terms of the three components of $q_{inv}$: $q_{long}$, $q_{out}$, and $q_{side}$. For charged particle pairs, the width of the balance function in terms of $\Delta \eta$ scales smoothly with the number of participating nucleons, while HIJING and UrQMD model calculations show no dependence on centrality or system size. For charged particle and charged pion pairs, the balance functions widths in terms of $\Delta \eta$ and $\Delta y$ are narrower in central Au+Au collisions than in peripheral collisions. The width for central collisions is consistent with thermal blast-wave models where the balancing charges are highly correlated in coordinate space at breakup. This strong correlation might be explained either by delayed hadronization or by limited diffusion during the reaction. Furthermore, the narrowing trend is consistent with the lower kinetic temperatures inherent to more central collisions. In contrast, the width of the balance function for charged kaon pairs in terms of $\Delta y$ shows little centrality dependence, which may signal a different production mechanism for kaons. The widths of the balance functions for charged pions and kaons in terms of $q_{inv}$ narrow in central collisions compared to peripheral collisions, which may be driven by the change in the kinetic temperature.

Figure 1

Data from Figure 1

10.17182/hepdata.101340.v1/t1

The distribution of the reconstructed position of the event vertex along the beam direction for events from Au+Au collisions at...
https://www.hepdata.net/record/data/847700yaml https://www.hepdata.net/record/data/847700/csvcsv
Figure 2

Data from Figure 2

10.17182/hepdata.101340.v1/t2

Calculated balance functions for all charged particles from central Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV using HIJING. The open...
https://www.hepdata.net/record/data/847701yaml https://www.hepdata.net/record/data/847701/csvcsv
Figure 3

Data from Figure 3

10.17182/hepdata.101340.v1/t3

The balance function in terms of $\Delta \eta$ for all charged particle pairs from Au+Au collisions at $\sqrt{s_{NN}}$ = 200...
https://www.hepdata.net/record/data/847702yaml https://www.hepdata.net/record/data/847702/csvcsv
Figure 4

Data from Figure 4

10.17182/hepdata.101340.v1/t4

The balance function in terms of $\Delta y$ for identiﬁed charged pion pairs from Au+Au collisions at $\sqrt{s_{NN}}$ = 200...
https://www.hepdata.net/record/data/847703yaml https://www.hepdata.net/record/data/847703/csvcsv
Figure 5

Data from Figure 5

10.17182/hepdata.101340.v1/t5

The balance function in terms of $\Delta y$ for identiﬁed charged kaon pairs from Au+Au collisions at $\sqrt{s_{NN}}$ = 200...
https://www.hepdata.net/record/data/847704yaml https://www.hepdata.net/record/data/847704/csvcsv
Figure 6-1

Data from Figure 6

10.17182/hepdata.101340.v1/t6

The balance function for p+p collisions at $\sqrt{s_{NN}}$ = 200 GeV. The top panel shows the balance function for all...
https://www.hepdata.net/record/data/847705yaml https://www.hepdata.net/record/data/847705/csvcsv
Figure 6-2

Data from Figure 6

10.17182/hepdata.101340.v1/t7

The balance function for p+p collisions at $\sqrt{s_{NN}}$ = 200 GeV. The top panel shows the balance function for all...
https://www.hepdata.net/record/data/847706yaml https://www.hepdata.net/record/data/847706/csvcsv
Figure 7

Data from Figure 7

10.17182/hepdata.101340.v1/t8

The balance function in terms of $\Delta \eta$ for all charged particles from d+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV...
https://www.hepdata.net/record/data/847707yaml https://www.hepdata.net/record/data/847707/csvcsv
Figure 8

Data from Figure 8

10.17182/hepdata.101340.v1/t9

The balance function in terms of $q_{inv}$ for charged pion pairs from Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV in...
https://www.hepdata.net/record/data/847708yaml https://www.hepdata.net/record/data/847708/csvcsv
Figure 9

Data from Figure 9

10.17182/hepdata.101340.v1/t10

The balance function in terms of $q_{inv}$ for charged-pion pairs in two centrality bins over the range 0 < $q_{inv}$...
https://www.hepdata.net/record/data/847709yaml https://www.hepdata.net/record/data/847709/csvcsv
Figure 10

Data from Figure 10

10.17182/hepdata.101340.v1/t11

The balance function in terms of $q_{inv}$ for charged kaon pairs from Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV in...
https://www.hepdata.net/record/data/847710yaml https://www.hepdata.net/record/data/847710/csvcsv
Figure 11

Data from Figure 11

10.17182/hepdata.101340.v1/t12

The balance function in terms of $q_{inv}$ for charged pion pairs [part a)] and charged kaon pairs [part b)] from...
https://www.hepdata.net/record/data/847711yaml https://www.hepdata.net/record/data/847711/csvcsv
Figure 12

Data from Figure 12

10.17182/hepdata.101340.v1/t13

The balance function in terms of $q_{long}$ for charged pion pairs from Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV in...
https://www.hepdata.net/record/data/847712yaml https://www.hepdata.net/record/data/847712/csvcsv
Figure 13

Data from Figure 13

10.17182/hepdata.101340.v1/t14

The balance function in terms of $q_{out}$ for charged pion pairs from Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV in...
https://www.hepdata.net/record/data/847713yaml https://www.hepdata.net/record/data/847713/csvcsv
Figure 14

Data from Figure 14

10.17182/hepdata.101340.v1/t15

(Color online) The balance function in terms of $q_{side}$ for charged pion pairs from Au+Au collisions at $\sqrt{s_{NN}}$ = 200...
https://www.hepdata.net/record/data/847714yaml https://www.hepdata.net/record/data/847714/csvcsv
Figure 15

Data from Figure 15

10.17182/hepdata.101340.v1/t16

(Color online) The balance function in terms of $\Delta\phi$ for all charged particles with 0.2< pt<2.0 GeV/c from Au+Au collisions...
https://www.hepdata.net/record/data/847715yaml https://www.hepdata.net/record/data/847715/csvcsv
Figure 16

Data from Figure 16

10.17182/hepdata.101340.v1/t17

(Color online) The balance function in terms of $\Delta\phi$ for all charged particles with 1.0< pt<10.0 GeV/c from Au+Au collisions...
https://www.hepdata.net/record/data/847716yaml https://www.hepdata.net/record/data/847716/csvcsv
Figure 17-1

Data from Figure 17 (Data $0-5\%$, HIJING Filtered)

10.17182/hepdata.101340.v1/t18

(Color online) The balance function in terms of $\Delta y$ for charged pions from central collisions of Au+Au at $\sqrt{s_{NN}}$...
https://www.hepdata.net/record/data/847717yaml https://www.hepdata.net/record/data/847717/csvcsv
Figure 17-2

Data from Figure 17 (Blast Wave Model)

10.17182/hepdata.101340.v1/t19

(Color online) The balance function in terms of $\Delta y$ for charged pions from central collisions of Au+Au at $\sqrt{s_{NN}}$...
https://www.hepdata.net/record/data/847718yaml https://www.hepdata.net/record/data/847718/csvcsv
Figure 18-1

Data from Figure 18 (Data $0-5\%$, HIJING Filtered)

10.17182/hepdata.101340.v1/t20

(Color online) The balance function in terms of $q_{inv}$ for charged pions from central collisions of Au+Au at $\sqrt{s_{NN}}$ =...
https://www.hepdata.net/record/data/847719yaml https://www.hepdata.net/record/data/847719/csvcsv
Figure 18-2

Data from Figure 18 (Blast Wave Model)

10.17182/hepdata.101340.v1/t21

(Color online) The balance function in terms of $q_{inv}$ for charged pions from central collisions of Au+Au at $\sqrt{s_{NN}}$ =...
https://www.hepdata.net/record/data/847720yaml https://www.hepdata.net/record/data/847720/csvcsv
Figure 19-1

Data from Figure 19 (AuAu, dAu)

10.17182/hepdata.101340.v1/t22

(Color online) The balance function width $<\Delta\eta>$ for all charged particles from Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV compared...
https://www.hepdata.net/record/data/847721yaml https://www.hepdata.net/record/data/847721/csvcsv
Figure 19-2

Data from Figure 19 (pp)

10.17182/hepdata.101340.v1/t23

(Color online) The balance function width $<\Delta\eta>$ for all charged particles from Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV compared...
https://www.hepdata.net/record/data/847722yaml https://www.hepdata.net/record/data/847722/csvcsv
Figure 20

Data from Figure 20

10.17182/hepdata.101340.v1/t24

(Color online) The balance function widths for identified charged pions and charged kaons from Au+Au collisions at $\sqrt{s_{NN}}$ = 200...
https://www.hepdata.net/record/data/847723yaml https://www.hepdata.net/record/data/847723/csvcsv
Figure 21-1

Data from Figure 21 (Pions)

10.17182/hepdata.101340.v1/t25

(Color online) The balance function width $\sigma$ extracted from $B(q_{inv})$ for identified charged pions and kaons from Au+Au collisions at...
https://www.hepdata.net/record/data/847724yaml https://www.hepdata.net/record/data/847724/csvcsv
Figure 21-2

Data from Figure 21 (Kaons)

10.17182/hepdata.101340.v1/t26

(Color online) The balance function width $\sigma$ extracted from $B(q_{inv})$ for identified charged pions and kaons from Au+Au collisions at...
https://www.hepdata.net/record/data/847725yaml https://www.hepdata.net/record/data/847725/csvcsv
Figure 22

Data from Figure 22

10.17182/hepdata.101340.v1/t27

(Color online) The widths for the balance functions for pions in terms of $q_{long}$, $q_{out}$, and $q_{side}$ compared with UrQMD...
https://www.hepdata.net/record/data/847726yaml https://www.hepdata.net/record/data/847726/csvcsv
Figure 23

Data from Figure 23

10.17182/hepdata.101340.v1/t28

(Color online) The weighted average cosine of the relative azimuthal angle,$<\cos(\Delta\phi)$, extracted from $B(\Delta\phi)$ for all charged particles with $0.2<...
https://www.hepdata.net/record/data/847727yaml https://www.hepdata.net/record/data/847727/csvcsv

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