Strange Anti-Particle to Particle Ratios at Mid-Rapidity in sqrt(sNN) = 130 GeV Au+Au Collisions
J. Adams et al., Phys. Lett. B 567, 167(2003).

Figure 1: Invariant mass distributions.

Only statistical errors are listed.

Figure 1a.

(i) Λ

Invariant Mass pπ [GeV/c2]Counts
1.05950 ± 0.0
1.06050 ± 0.0
1.06150 ± 0.0
1.06250 ± 0.0
1.06350 ± 0.0
1.06450 ± 0.0
1.06550 ± 0.0
1.06650 ± 0.0
1.06750 ± 0.0
1.06850 ± 0.0
1.06950 ± 0.0
1.07050 ± 0.0
1.07150 ± 0.0
1.07250 ± 0.0
1.07350 ± 0.0
1.07450 ± 0.0
1.07550 ± 0.0
1.07650 ± 0.0
1.077581 ± 9.0
1.0785469 ± 21.7
1.0795398 ± 19.9
1.0805421 ± 20.5
1.0815437 ± 20.9
1.0825535 ± 23.1
1.0835518 ± 22.8
1.0845583 ± 24.1
1.0855563 ± 23.7
1.0865595 ± 24.4
1.0875589 ± 24.3
1.0885590 ± 24.3
1.0895643 ± 25.4
1.0905584 ± 24.2
1.0915663 ± 25.7
1.0925635 ± 25.2
1.0935617 ± 24.8
1.0945633 ± 25.2
1.0955644 ± 25.4
1.0965686 ± 26.2
1.0975690 ± 26.3
1.0985681 ± 26.1
1.0995669 ± 25.9
1.1005717 ± 26.8
1.1015686 ± 26.2
1.1025711 ± 26.7
1.1035732 ± 27.1
1.1045777 ± 27.9
1.1055888 ± 29.8
1.10651004 ± 31.7
1.10751093 ± 33.1
1.10851450 ± 38.1
1.10951710 ± 41.4
1.11052459 ± 49.6
1.11153653 ± 60.4
1.11255647 ± 75.1
1.11358779 ± 93.7
1.114512471 ± 111.7
1.115513421 ± 115.8
1.116511294 ± 106.3
1.11757810 ± 88.4
1.11855514 ± 74.3
1.11953764 ± 61.4
1.12052657 ± 51.5
1.12151975 ± 44.4
1.12251694 ± 41.2
1.12351355 ± 36.8
1.12451249 ± 35.3
1.12551079 ± 32.8
1.12651080 ± 32.9
1.12751047 ± 32.4
1.12851018 ± 31.9
1.1295968 ± 31.1
1.1305960 ± 31.0
1.1315931 ± 30.5
1.1325920 ± 30.3
1.1335884 ± 29.7
1.1345920 ± 30.3
1.1355922 ± 30.4
1.1365888 ± 29.8
1.1375931 ± 30.5
1.1385905 ± 30.1
1.1395908 ± 30.1
1.1405892 ± 29.9
1.1415933 ± 30.5
1.1425916 ± 30.3
1.1435889 ± 29.8
1.1445929 ± 30.5
1.1455929 ± 30.5
1.1465913 ± 30.2
1.1475991 ± 31.5
1.1485910 ± 30.2
1.1495924 ± 30.4
1.1505910 ± 30.2
1.1515865 ± 29.4
1.1525917 ± 30.3
1.1535922 ± 30.4
1.1545864 ± 29.4
1.1555804 ± 28.4
1.1565826 ± 28.7
1.1575826 ± 28.7
1.1585822 ± 28.7
1.1595834 ± 28.9
1.1605772 ± 27.8
1.1615773 ± 27.8
1.1625791 ± 28.1
1.1635788 ± 28.1
1.1645843 ± 29.0
1.1655758 ± 27.5
1.1665783 ± 28.0
1.1675813 ± 28.5
1.1685783 ± 28.0
1.1695685 ± 26.2
1.1705717 ± 26.8
1.1715733 ± 27.1
1.1725790 ± 28.1
1.1735758 ± 27.5
1.1745694 ± 26.3
1.1755736 ± 27.1
1.1765676 ± 26.0
1.1775722 ± 26.9
1.1785718 ± 26.8
1.1795712 ± 26.7
1.1805691 ± 26.3
1.1815736 ± 27.1
1.1825670 ± 25.9
1.1835704 ± 26.5
1.1845747 ± 27.3
1.1855691 ± 26.3
1.1865722 ± 26.9
1.1875618 ± 24.9
1.1885642 ± 25.3
1.1895632 ± 25.1
1.1905631 ± 25.1
1.1915620 ± 24.9
1.1925687 ± 26.2
1.1935683 ± 26.1
1.1945630 ± 25.1
1.1955612 ± 24.7
1.1965614 ± 24.8
1.1975596 ± 24.4
1.1985591 ± 24.3
1.1995588 ± 24.2

(ii) Anti-Λ

Invariant Mass pπ [GeV/c2]Counts
1.05950 ± 0.0
1.06050 ± 0.0
1.06150 ± 0.0
1.06250 ± 0.0
1.06350 ± 0.0
1.06450 ± 0.0
1.06550 ± 0.0
1.06650 ± 0.0
1.06750 ± 0.0
1.06850 ± 0.0
1.06950 ± 0.0
1.07050 ± 0.0
1.07150 ± 0.0
1.07250 ± 0.0
1.07350 ± 0.0
1.07450 ± 0.0
1.07550 ± 0.0
1.07650 ± 0.0
1.077595 ± 9.7
1.0785495 ± 22.2
1.0795441 ± 21.0
1.0805371 ± 19.3
1.0815400 ± 20.0
1.0825437 ± 20.9
1.0835423 ± 20.6
1.0845481 ± 21.9
1.0855476 ± 21.8
1.0865477 ± 21.8
1.0875440 ± 21.0
1.0885537 ± 23.2
1.0895515 ± 22.7
1.0905497 ± 22.3
1.0915490 ± 22.1
1.0925489 ± 22.1
1.0935514 ± 22.7
1.0945547 ± 23.4
1.0955497 ± 22.3
1.0965526 ± 22.9
1.0975540 ± 23.2
1.0985579 ± 24.1
1.0995549 ± 23.4
1.1005569 ± 23.9
1.1015580 ± 24.1
1.1025632 ± 25.1
1.1035598 ± 24.5
1.1045648 ± 25.5
1.1055690 ± 26.3
1.1065777 ± 27.9
1.1075912 ± 30.2
1.10851076 ± 32.8
1.10951439 ± 37.9
1.11051891 ± 43.5
1.11152736 ± 52.3
1.11254106 ± 64.1
1.11356365 ± 79.8
1.11458894 ± 94.3
1.11559881 ± 99.4
1.11658454 ± 91.9
1.11755889 ± 76.7
1.11854081 ± 63.9
1.11952779 ± 52.7
1.12052021 ± 45.0
1.12151558 ± 39.5
1.12251268 ± 35.6
1.12351142 ± 33.8
1.12451090 ± 33.0
1.1255920 ± 30.3
1.1265875 ± 29.6
1.1275876 ± 29.6
1.1285812 ± 28.5
1.1295850 ± 29.2
1.1305813 ± 28.5
1.1315745 ± 27.3
1.1325800 ± 28.3
1.1335827 ± 28.8
1.1345813 ± 28.5
1.1355728 ± 27.0
1.1365817 ± 28.6
1.1375788 ± 28.1
1.1385802 ± 28.3
1.1395788 ± 28.1
1.1405804 ± 28.4
1.1415790 ± 28.1
1.1425739 ± 27.2
1.1435757 ± 27.5
1.1445736 ± 27.1
1.1455772 ± 27.8
1.1465716 ± 26.8
1.1475771 ± 27.8
1.1485771 ± 27.8
1.1495862 ± 29.4
1.1505787 ± 28.1
1.1515807 ± 28.4
1.1525767 ± 27.7
1.1535741 ± 27.2
1.1545722 ± 26.9
1.1555789 ± 28.1
1.1565729 ± 27.0
1.1575790 ± 28.1
1.1585712 ± 26.7
1.1595708 ± 26.6
1.1605716 ± 26.8
1.1615711 ± 26.7
1.1625709 ± 26.6
1.1635705 ± 26.6
1.1645712 ± 26.7
1.1655684 ± 26.2
1.1665687 ± 26.2
1.1675634 ± 25.2
1.1685636 ± 25.2
1.1695629 ± 25.1
1.1705669 ± 25.9
1.1715706 ± 26.6
1.1725678 ± 26.0
1.1735679 ± 26.1
1.1745626 ± 25.0
1.1755608 ± 24.7
1.1765619 ± 24.9
1.1775609 ± 24.7
1.1785628 ± 25.1
1.1795626 ± 25.0
1.1805572 ± 23.9
1.1815630 ± 25.1
1.1825648 ± 25.5
1.1835592 ± 24.3
1.1845620 ± 24.9
1.1855594 ± 24.4
1.1865589 ± 24.3
1.1875607 ± 24.6
1.1885595 ± 24.4
1.1895542 ± 23.3
1.1905577 ± 24.0
1.1915554 ± 23.5
1.1925587 ± 24.2
1.1935550 ± 23.5
1.1945554 ± 23.5
1.1955547 ± 23.4
1.1965535 ± 23.1
1.1975541 ± 23.3
1.1985527 ± 23.0
1.1995541 ± 23.3

Figure 1b.

(i) Ξ

Invariant Mass Λπ [GeV/c2]Counts
1.22130 ± 0.0
1.22330 ± 0.0
1.22530 ± 0.0
1.22730 ± 0.0
1.22930 ± 0.0
1.23130 ± 0.0
1.23330 ± 0.0
1.23530 ± 0.0
1.23730 ± 0.0
1.23930 ± 0.0
1.24130 ± 0.0
1.24330 ± 0.0
1.24530 ± 0.0
1.24730 ± 0.0
1.24930 ± 0.0
1.25130 ± 0.0
1.25330 ± 0.0
1.25530 ± 0.0
1.25732 ± 1.4
1.259311 ± 3.3
1.261325 ± 5.0
1.263331 ± 5.6
1.265355 ± 7.4
1.267355 ± 7.4
1.269355 ± 7.4
1.271366 ± 8.1
1.273398 ± 9.9
1.2753100 ± 10.0
1.2773105 ± 10.2
1.2793121 ± 11.0
1.2813121 ± 11.0
1.2833148 ± 12.2
1.2853141 ± 11.9
1.2873160 ± 12.6
1.2893154 ± 12.4
1.2913199 ± 14.1
1.2933211 ± 14.5
1.2953218 ± 14.8
1.2973215 ± 14.7
1.2993208 ± 14.4
1.3013223 ± 14.9
1.3033189 ± 13.7
1.3053198 ± 14.1
1.3073223 ± 14.9
1.3093240 ± 15.5
1.3113251 ± 15.8
1.3133370 ± 19.2
1.3153472 ± 21.7
1.3173731 ± 27.0
1.31931094 ± 33.1
1.32131503 ± 38.8
1.32331192 ± 34.5
1.3253818 ± 28.6
1.3273480 ± 21.9
1.3293345 ± 18.6
1.3313272 ± 16.5
1.3333247 ± 15.7
1.3353193 ± 13.9
1.3373217 ± 14.7
1.3393233 ± 15.3
1.3413208 ± 14.4
1.3433211 ± 14.5
1.3453188 ± 13.7
1.3473201 ± 14.2
1.3493204 ± 14.3
1.3513175 ± 13.2
1.3533177 ± 13.3
1.3553184 ± 13.6
1.3573169 ± 13.0
1.3593187 ± 13.7
1.3613179 ± 13.4
1.3633200 ± 14.1
1.3653177 ± 13.3
1.3673179 ± 13.4
1.3693212 ± 14.6
1.3713206 ± 14.4
1.3733176 ± 13.3
1.3753193 ± 13.9
1.3773188 ± 13.7
1.3793192 ± 13.9
1.3813197 ± 14.0
1.3833181 ± 13.5
1.3853175 ± 13.2
1.3873169 ± 13.0
1.3893220 ± 14.8
1.3913161 ± 12.7
1.3933157 ± 12.5
1.3953160 ± 12.6
1.3973147 ± 12.1
1.3993166 ± 12.9
1.4013181 ± 13.5
1.4033178 ± 13.3
1.4053181 ± 13.5
1.4073171 ± 13.1
1.4093157 ± 12.5
1.4113175 ± 13.2
1.4133161 ± 12.7
1.4153162 ± 12.7
1.4173154 ± 12.4
1.4193159 ± 12.6
1.4213160 ± 12.6

(ii) Anti-Ξ

Invariant Mass Λπ [GeV/c2]Counts
1.22130 ± 0.0
1.22330 ± 0.0
1.22530 ± 0.0
1.22730 ± 0.0
1.22930 ± 0.0
1.23130 ± 0.0
1.23330 ± 0.0
1.23530 ± 0.0
1.23730 ± 0.0
1.23930 ± 0.0
1.24130 ± 0.0
1.24330 ± 0.0
1.24530 ± 0.0
1.24730 ± 0.0
1.24930 ± 0.0
1.25130 ± 0.0
1.25330 ± 0.0
1.25530 ± 0.0
1.257310 ± 3.2
1.25935 ± 2.2
1.261320 ± 4.5
1.263320 ± 4.5
1.265333 ± 5.7
1.267342 ± 6.5
1.269352 ± 7.2
1.271368 ± 8.2
1.273365 ± 8.1
1.275380 ± 8.9
1.277366 ± 8.1
1.279396 ± 9.8
1.281390 ± 9.5
1.2833132 ± 11.5
1.2853110 ± 10.5
1.2873128 ± 11.3
1.2893127 ± 11.3
1.2913138 ± 11.7
1.2933154 ± 12.4
1.2953155 ± 12.4
1.2973168 ± 13.0
1.2993153 ± 12.4
1.3013140 ± 11.8
1.3033169 ± 13.0
1.3053147 ± 12.1
1.3073156 ± 12.5
1.3093192 ± 13.9
1.3113209 ± 14.5
1.3133264 ± 16.2
1.3153394 ± 19.8
1.3173584 ± 24.2
1.3193926 ± 30.4
1.32131166 ± 34.1
1.3233980 ± 31.3
1.3253625 ± 25.0
1.3273361 ± 19.0
1.3293284 ± 16.9
1.3313211 ± 14.5
1.3333190 ± 13.8
1.3353166 ± 12.9
1.3373151 ± 12.3
1.3393147 ± 12.1
1.3413182 ± 13.5
1.3433141 ± 11.9
1.3453142 ± 11.9
1.3473171 ± 13.1
1.3493152 ± 12.3
1.3513152 ± 12.3
1.3533160 ± 12.6
1.3553156 ± 12.5
1.3573181 ± 13.5
1.3593146 ± 12.1
1.3613149 ± 12.2
1.3633162 ± 12.7
1.3653169 ± 13.0
1.3673143 ± 12.0
1.3693162 ± 12.7
1.3713153 ± 12.4
1.3733156 ± 12.5
1.3753141 ± 11.9
1.3773144 ± 12.0
1.3793162 ± 12.7
1.3813152 ± 12.3
1.3833145 ± 12.0
1.3853124 ± 11.1
1.3873160 ± 12.6
1.3893149 ± 12.2
1.3913155 ± 12.4
1.3933164 ± 12.8
1.3953139 ± 11.8
1.3973156 ± 12.5
1.3993138 ± 11.7
1.4013122 ± 11.0
1.4033146 ± 12.1
1.4053143 ± 12.0
1.4073146 ± 12.1
1.4093141 ± 11.9
1.4113134 ± 11.6
1.4133120 ± 11.0
1.4153142 ± 11.9
1.4173116 ± 10.8
1.4193134 ± 11.6
1.4213123 ± 11.1

Figure 1c.

(i) Ω

Invariant Mass ΛK [GeV/c2]Counts
1.58000 ± 0.0
1.58400 ± 0.0
1.58800 ± 0.0
1.59200 ± 0.0
1.59600 ± 0.0
1.60000 ± 0.0
1.60400 ± 0.0
1.60800 ± 0.0
1.61203 ± 1.7
1.61606 ± 2.4
1.620015 ± 3.9
1.624019 ± 4.4
1.628014 ± 3.7
1.632025 ± 5.0
1.636025 ± 5.0
1.640026 ± 5.1
1.644037 ± 6.1
1.648032 ± 5.7
1.652033 ± 5.7
1.656026 ± 5.1
1.660039 ± 6.2
1.664048 ± 6.9
1.668070 ± 8.4
1.672089 ± 9.4
1.676063 ± 7.9
1.680046 ± 6.8
1.684041 ± 6.4
1.688031 ± 5.6
1.692035 ± 5.9
1.696030 ± 5.5
1.700028 ± 5.3
1.704031 ± 5.6
1.708034 ± 5.8
1.712035 ± 5.9
1.716024 ± 4.9
1.720030 ± 5.5
1.724026 ± 5.1
1.728024 ± 4.9
1.732028 ± 5.3
1.736023 ± 4.8
1.740026 ± 5.1
1.744033 ± 5.7
1.748020 ± 4.5
1.752032 ± 5.7
1.756023 ± 4.8
1.760033 ± 5.7

(ii) Anti-Ω

Invariant Mass ΛK [GeV/c2]Counts
1.58000 ± 0.0
1.58400 ± 0.0
1.58800 ± 0.0
1.59200 ± 0.0
1.59600 ± 0.0
1.60000 ± 0.0
1.60400 ± 0.0
1.60800 ± 0.0
1.61201 ± 1.0
1.61601 ± 1.0
1.620011 ± 3.3
1.624013 ± 3.6
1.628016 ± 4.0
1.632013 ± 3.6
1.636019 ± 4.4
1.640023 ± 4.8
1.644028 ± 5.3
1.648026 ± 5.1
1.652020 ± 4.5
1.656020 ± 4.5
1.660023 ± 4.8
1.664042 ± 6.5
1.668065 ± 8.1
1.672076 ± 8.7
1.676058 ± 7.6
1.680037 ± 6.1
1.684031 ± 5.6
1.688027 ± 5.2
1.692029 ± 5.4
1.696022 ± 4.7
1.700023 ± 4.8
1.704031 ± 5.6
1.708027 ± 5.2
1.712027 ± 5.2
1.716024 ± 4.9
1.720020 ± 4.5
1.724012 ± 3.5
1.728019 ± 4.4
1.732022 ± 4.7
1.736017 ± 4.1
1.740027 ± 5.2
1.744024 ± 4.9
1.748026 ± 5.1
1.752021 ± 4.6
1.756021 ± 4.6
1.760025 ± 5.0

Figure 2: The ratios Anti-Λ/Λ, K+/K-, and Anti-Ξ+/Ξ- as a function of pT.

Statistical and systematic errors are listed separately.
pT [GeV/c]Λ/Λ ± stat. ± sys.
0.50.7568 ± 0.0307 ± 0.04
0.70.7061 ± 0.0174 ± 0.04
0.90.6887 ± 0.0146 ± 0.04
1.10.7160 ± 0.0145 ± 0.04
1.30.7272 ± 0.0134 ± 0.04
1.50.7172 ± 0.0137 ± 0.04
1.70.7063 ± 0.0148 ± 0.04
1.90.7004 ± 0.0172 ± 0.04
2.10.6845 ± 0.0207 ± 0.04
2.30.6962 ± 0.0262 ± 0.04
2.50.7300 ± 0.0345 ± 0.04

pT [GeV/c](Ξ/Ξ ± stat. ± sys.)×0.5
0.80.4053 ± 0.0446 ± 0.025
1.30.4064 ± 0.0262 ± 0.025
1.680.4467 ± 0.0322 ± 0.025
2.0250.4029 ± 0.0335 ± 0.025
2.3550.4095 ± 0.0378 ± 0.025
2.6750.3998 ± 0.0577 ± 0.025
3.1650.4446 ± 0.0650 ± 0.025

dE/dx kaons (0.15-0.6 GeV pT)

pT [GeV/c]K+/K- ± stat. ± sys.
0.1751.0951 ± 0.0350 ± 0.025
0.2251.0631 ± 0.0236 ± 0.025
0.2751.0639 ± 0.0310 ± 0.025
0.3251.0761 ± 0.0181 ± 0.025
0.3751.0613 ± 0.0163 ± 0.025
0.4251.0890 ± 0.0154 ± 0.025
0.4751.0833 ± 0.0233 ± 0.025
0.5251.0492 ± 0.0146 ± 0.025
0.5751.0860 ± 0.0149 ± 0.025

Kink kaons (0.2-2.0 GeV pT)

pT [GeV/c]K+/K- ± stat. ± sys.
0.31.0875 ± 0.0244 ± 0.05
0.51.1795 ± 0.0216 ± 0.05
0.71.1306 ± 0.0228 ± 0.05
0.91.0975 ± 0.0280 ± 0.05
1.11.1337 ± 0.0408 ± 0.1
1.31.1477 ± 0.0568 ± 0.1
1.51.1467 ± 0.0819 ± 0.1
1.71.1299 ± 0.1055 ± 0.1
1.91.1008 ± 0.1628 ± 0.1

Figure 3: Anti-baryon to baryon ratios measured by STAR.

Statistical and systematic errors are listed separately.
RatioValue ± stat. ± sys.
p/p0.72 ± 0.002 ± 0.05
Λ/Λ0.71 ± 0.01 ± 0.04
Ξ/Ξ0.83 ± 0.04 ± 0.05
Ω/Ω0.95 ± 0.15 ± 0.05
Lee Barnby
Last modified: Thu Jul 17 23:59:14 EDT 2003