STAR Physics Database

Scaling properties of hyperon production in Au+Au collisions at s(NN)**(1/2) = 200-GeV
J. Adams et al., Phys. Rev. Lett. 98, 062301 (2007).

Lambda pT distribution
Lambda bar pT distribution
Xi- pT distribution
Xi+ pT distribution
Omega- + Omega+ pT distribution
Ratio [((dN/dy)/Npart)(x%)]/[((dN/dy)/Npart)(60-80%)] vs centrality
gamma_s vs centrality
RCP

#####################################################################

Figure 1) Lambda pT distribution

// 0-5% centrality **************************************************
_____________________________________________________________________
Pt 1/N_event d² N / (2 π p_T dp_Tdy) Total error
(GeV/c) (c²/GeV²) sqrt(stat² + syst²))
_____________________________________________________________________
0.65 2.83599 0.33435
0.75 2.39640 0.247236
0.9 1.83184 0.160367
1.1 1.44632 0.124649
1.3 1.11520 0.096413
1.5 0.736476 0.0617669
1.7 0.433343 0.0366523
1.9 0.27969 0.0240648
2.1 0.163797 0.0159121
2.3 0.09883 0.00989397
2.5 0.055582 0.00515282
2.7 0.032521 0.00306859
2.9 0.01885 0.00309127
3.175 0.00861539 0.00141612
3.575 0.00307043 0.000499559
4.1 0.00072535 0.000121332
4.75 0.000129439 2.25745e-05

// 10-20% centrality ************************************************
_____________________________________________________________________
Pt 1/N_event d² N / (2 π p_T dp_Tdy) Total error
(GeV/c) (c²/GeV²) sqrt(stat² + syst²))
_____________________________________________________________________
0.65 1.80199 0.177967
0.75 1.50201 0.138122
0.9 1.17181 0.0990205
1.1 0.894054 0.0745711
1.3 0.652226 0.0543879
1.5 0.435295 0.0358408
1.7 0.26549 0.0219856
1.9 0.14610 0.0122123
2.1 0.094547 0.008915
2.3 0.056353 0.00541004
2.5 0.032926 0.00303251
2.7 0.02002 0.00186724
2.9 0.01064 0.00173409
3.175 0.005300 0.000864288
3.575 0.0019134 0.000311048
4.1 0.0004684 7.79804e-05
4.75 0.0001087 1.88427e-05

// 20-40% centrality ************************************************
_____________________________________________________________________
Pt 1/N_event d² N / (2 π p_T dp_Tdy) Total error
(GeV/c) (c²/GeV²) sqrt(stat² + syst²))
_____________________________________________________________________
0.65 0.967984 0.0891251
0.75 0.956233 0.0845831
0.9 0.680232 0.0565133
1.1 0.484186 0.0398945
1.3 0.349551 0.0287981
1.5 0.223801 0.0182878
1.7 0.144321 0.0118499
1.9 0.0796466 0.00659499
2.1 0.0501193 0.004681
2.3 0.0278857 0.00263996
2.5 0.016321 0.0015026
2.7 0.0098415 0.000917413
2.9 0.00573908 0.00093474
3.175 0.00274629 0.000447936
3.575 0.00104966 0.00017148
4.1 0.0002763 4.65229e-05
4.75 5.88564e-05 1.07948e-05

// 40-60% centrality ************************************************
_____________________________________________________________________
Pt 1/N_event d² N / (2 π p_T dp_Tdy) Total error
(GeV/c) (c²/GeV²) sqrt(stat² + syst²))
_____________________________________________________________________
0.65 0.459629 0.0448784
0.75 0.389864 0.0361806
0.9 0.295241 0.0254226
1.1 0.199909 0.0170767
1.3 0.114799 0.00978099
1.5 0.0812839 0.00684239
1.7 0.0457419 0.00389331
1.9 0.0272165 0.00236065
2.1 0.0167704 0.00165684
2.3 0.0099343 0.00101152
2.5 0.00559898 0.000534813
2.7 0.0034574 0.00034003
2.9 0.00207583 0.000347349
3.175 0.0009820 0.000165536
3.575 0.00041335 7.05163e-05
4.1 0.000129606 2.28847e-05
4.75 3.54337e-05 6.71787e-06

// 60-80% centrality ************************************************
_____________________________________________________________________
Pt 1/N_event d² N / (2 π p_T dp_Tdy) Total error
(GeV/c) (c²/GeV²) sqrt(stat² + syst²))
_____________________________________________________________________
0.65 0.168534 0.0208304
0.75 0.143039 0.0161363
0.9 0.082781 0.00787756
1.1 0.0542705 0.00504905
1.3 0.0333924 0.00317665
1.5 0.0199942 0.00183791
1.7 0.0121928 0.00115109
1.9 0.006456 0.000650213
2.1 0.00414492 0.000474507
2.3 0.00219189 0.000270842
2.5 0.00163805 0.000176904
2.7 0.0008338 9.922e-05
2.9 0.000613 0.00011415
3.175 0.00024120 4.46489e-05
3.575 7.23728e-05 1.51173e-05
4.1 3.84101e-05 7.83692e-06
4.75 9.69415e-06 2.34143e-06

Figure 1) Lambda bar pT distribution

// 0-5% centrality **************************************************
_____________________________________________________________________
Pt 1/N_event d² N / (2 π p_T dp_Tdy) Total error
(GeV/c) (c²/GeV²) sqrt(stat² + syst²))
_____________________________________________________________________
0.65 2.30784 0.286095
0.75 1.766 0.188539
0.9 1.36499 0.120462
1.1 1.08357 0.0938185
1.3 0.848352 0.0735614
1.5 0.555214 0.0465812
1.7 0.3298 0.0279053
1.9 0.213435 0.0183726
2.1 0.126735 0.0123168
2.3 0.0768405 0.007697
2.5 0.0419265 0.00389162
2.7 0.02600 0.00245634
2.9 0.0151173 0.00248069
3.175 0.00665018 0.00109393
3.575 0.00233379 0.000380526
4.1 0.000549773 9.23595e-05
4.75 0.0001 1.78261e-05

// 10-20% centrality ************************************************
_____________________________________________________________________
Pt 1/N_event d² N / (2 π p_T dp_Tdy) Total error
(GeV/c) (c²/GeV²) sqrt(stat² + syst²))
_____________________________________________________________________
0.65 1.44548 0.148717
0.75 1.16658 0.108518
0.9 0.856323 0.07283
1.1 0.692687 0.0580459
1.3 0.509114 0.0426063
1.5 0.329548 0.0271531
1.7 0.204497 0.0169474
1.9 0.115229 0.00963922
2.1 0.0724365 0.00683686
2.3 0.0431785 0.00415043
2.5 0.0244941 0.00226161
2.7 0.0162976 0.00152274
2.9 0.00858225 0.00140002
3.175 0.00410936 0.000671093
3.575 0.0015041 0.000245167
4.1 0.00036423 6.10318e-05
4.75 6.98763e-05 1.26469e-05

// 20-40% centrality ************************************************
_____________________________________________________________________
Pt 1/N_event d² N / (2 π p_T dp_Tdy) Total error
(GeV/c) (c²/GeV²) sqrt(stat² + syst²))
_____________________________________________________________________
0.65 0.857878 0.080983
0.75 0.758041 0.0679262
0.9 0.519982 0.0434115
1.1 0.372642 0.0307878
1.3 0.274312 0.0226465
1.5 0.176912 0.0144674
1.7 0.1064 0.0087491
1.9 0.0651557 0.00540105
2.1 0.0395817 0.00370268
2.3 0.0226509 0.00214824
2.5 0.013194 0.00121777
2.7 0.008162 0.000763733
2.9 0.0048427 0.000790124
3.175 0.0022617 0.000369619
3.575 0.00082609 0.000135524
4.1 0.000247877 4.1895e-05
4.75 3.75571e-05 7.36553e-06

// 40-60% centrality ************************************************
_____________________________________________________________________
Pt 1/N_event d² N / (2 π p_T dp_Tdy) Total error
(GeV/c) (c²/GeV²) sqrt(stat² + syst²))
_____________________________________________________________________
0.65 0.374418 0.0380656
0.75 0.32862 0.0313562
0.9 0.231972 0.0201658
1.1 0.159802 0.0137473
1.3 0.0950795 0.00814895
1.5 0.0634916 0.00536586
1.7 0.03534 0.00302291
1.9 0.021360 0.00186414
2.1 0.013277 0.00131964
2.3 0.0073926 0.000760725
2.5 0.00446449 0.000432489
2.7 0.002935 0.00029013
2.9 0.0019006 0.000317999
3.175 0.00085357 0.000144579
3.575 0.0003212 5.6165e-05
4.1 0.000102684 1.85026e-05
4.75 2.94334e-05 5.80844e-06

// 60-80% centrality ************************************************
_____________________________________________________________________
Pt 1/N_event d² N / (2 π p_T dp_Tdy) Total error
(GeV/c) (c²/GeV²) sqrt(stat² + syst²))
_____________________________________________________________________
0.65 0.150855 0.0202011
0.75 0.118582 0.0139428
0.9 0.0694138 0.0067412
1.1 0.0480208 0.00454884
1.3 0.0287427 0.00276352
1.5 0.015315 0.00141107
1.7 0.009046 0.000865643
1.9 0.0054680 0.000555258
2.1 0.0035348 0.000407654
2.3 0.0020240 0.000249621
2.5 0.001200 0.00013092
2.7 0.000624 7.69221e-05
2.9 0.0003805 7.50218e-05
3.175 0.0001799 3.40842e-05
3.575 7.591e-05 1.53583e-05
4.1 3.89649e-05 7.77967e-06
4.75 4.60395e-06 1.72627e-06

Figure 1) Xi- pT distribution

// 0-5% centrality ****************************************************
_______________________________________________________________________
Pt 1/N_event d² N / (2 π p_T dp_Tdy) Total error
(GeV/c) (c²/GeV²) sqrt(stat² + syst²))
_______________________________________________________________________
0.85 0.219225 0.0641832
1.1 0.174468 0.0266272
1.3 0.139292 0.0139973
1.5 0.101689 0.00882585
1.7 0.067031 0.00478156
1.90 0.044514 0.00380133
2.1 0.0295701 0.00240611
2.3 0.018492 0.00115146
2.5 0.010677 0.000960594
2.7 0.006271 0.000605398
2.95 0.004074 0.000596169
3.3 0.0015064 0.000307117
3.75 0.000508 0.000118522
4.25 0.000138 7.99822e-05
4.75 5.835e-05 3.94023e-05

// 10-20% centrality **************************************************
_______________________________________________________________________
Pt 1/N_event d² N / (2 π p_T dp_Tdy) Total error
(GeV/c) (c²/GeV²) sqrt(stat² + syst²))
_______________________________________________________________________
0.85 0.177337 0.033336
1.1 0.10018 0.0122009
1.3 0.0910861 0.00776715
1.5 0.0682762 0.00519721
1.7 0.0415767 0.0033732
1.90 0.030413 0.00271006
2.1 0.0159885 0.00176668
2.3 0.0101717 0.00142329
2.5 0.00714098 0.000939717
2.7 0.00475228 0.000684977
2.95 0.00276713 0.000251681
3.3 0.000890791 0.00013753
3.75 0.000292104 5.71302e-05
4.25 7.74552e-05 2.41164e-05
4.75 2.58367e-05 1.24912e-05

// 20-40% centrality **************************************************
_______________________________________________________________________
Pt 1/N_event d² N / (2 π p_T dp_Tdy) Total error
(GeV/c) (c²/GeV²) sqrt(stat² + syst²))
_______________________________________________________________________
0.85 0.0819258 0.00963482
1.1 0.0630996 0.00512758
1.3 0.0483361 0.00239332
1.5 0.0318001 0.00147882
1.7 0.0203188 0.00121731
1.90 0.0137242 0.00093914
2.1 0.00934691 0.000611065
2.3 0.00543946 0.000414511
2.5 0.00358333 0.000331154
2.7 0.00195847 0.00021559
2.95 0.00107925 8.29197e-05
3.3 0.000452657 3.88498e-05
3.75 0.000165093 3.69579e-05
4.25 4.20883e-05 1.37924e-05
4.75 1.43924e-05 5.73813e-06

// 40-60% centrality **************************************************
_______________________________________________________________________
Pt 1/N_event d² N / (2 π p_T dp_Tdy) Total error
(GeV/c) (c²/GeV²) sqrt(stat² + syst²))
_______________________________________________________________________
0.85 0.0323909 0.00415855
1.1 0.0205179 0.00209131
1.3 0.0178217 0.00165096
1.5 0.0119732 0.00137731
1.7 0.00765399 0.000545995
1.90 0.00523124 0.000353698
2.1 0.00314984 0.000262536
2.3 0.0018516 0.000328889
2.5 0.00118311 0.00016077
2.7 0.000669339 8.09337e-05
2.95 0.000388564 3.81236e-05
3.3 0.000205499 2.46552e-05
3.75 7.84608e-05 1.22595e-05
4.25 9.93613e-06 5.30394e-06

// 60-80% centrality ************************************************
_____________________________________________________________________
Pt 1/N_event d² N / (2 π p_T dp_Tdy) Total error
(GeV/c) (c²/GeV²) sqrt(stat² + syst²))
_____________________________________________________________________
0.95 0.00707708 0.000982435
1.4 0.00329691 0.000335679
1.8 0.00145766 0.000136483
2.2 0.000582486 6.85142e-05
2.75 0.00014584 2.34451e-05
3.55 2.13879e-05 8.96596e-06
5 1.33614e-06 7.38809e-07

Figure 1) Xi+ pT distribution

// 0-5% centrality **************************************************
_____________________________________________________________________
Pt 1/N_event d² N / (2 π p_T dp_Tdy) Total error
(GeV/c) (c²/GeV²) sqrt(stat² + syst²))
_____________________________________________________________________
0.85 0.179011 0.0628235
1.1 0.141772 0.0263445
1.3 0.122957 0.0140894
1.5 0.0845237 0.00875593
1.7 0.0603322 0.00488328
1.90 0.0368755 0.00378568
2.1 0.0244855 0.00242024
2.3 0.0154443 0.00117574
2.5 0.00939329 0.00100014
2.7 0.00617003 0.00072174
2.95 0.00289587 0.000566656
3.3 0.0012092 0.000296661
3.75 0.00045372 0.000124478
4.25 0.000104791 7.79393e-05
4.75 2.93982e-05 2.15791e-05

// 10-20% centrality **************************************************
_______________________________________________________________________
Pt 1/N_event d² N / (2 π p_T dp_Tdy) Total error
(GeV/c) (c²/GeV²) sqrt(stat² + syst²))
_______________________________________________________________________
0.85 0.154302 0.0322867
1.1 0.0856315 0.0116872
1.3 0.0645003 0.00740277
1.5 0.0531387 0.00491207
1.7 0.036265 0.00329031
1.90 0.0233279 0.00263564
2.1 0.0141625 0.00170846
2.3 0.00952927 0.00140945
2.5 0.00581291 0.000920679
2.7 0.00385327 0.000665882
2.95 0.00196497 0.000227255
3.3 0.00085375 0.000140415
3.75 0.000255312 5.7756e-05
4.25 6.32342e-05 2.34778e-05
4.75 1.85631e-05 1.16667e-05

// 20-40% centrality **************************************************
_______________________________________________________________________
Pt 1/N_event d² N / (2 π p_T dp_Tdy) Total error
(GeV/c) (c²/GeV²) sqrt(stat² + syst²))
_______________________________________________________________________
0.85 0.0777974 0.00845618
1.1 0.0502672 0.00690615
1.3 0.0346855 0.00232026
1.5 0.0294288 0.00217128
1.7 0.0187373 0.000927236
1.90 0.0126693 0.000629875
2.1 0.00780351 0.000613393
2.3 0.00480061 0.000330779
2.5 0.00271522 0.000220383
2.7 0.00183323 0.000428654
2.95 0.00100207 9.47565e-05
3.3 0.000384793 3.88601e-05
3.75 0.00013118 1.88949e-05
4.25 4.52507e-05 1.5812e-05
4.75 2.14887e-05 1.19322e-05

// 40-60% centrality **************************************************
_______________________________________________________________________
Pt 1/N_event d² N / (2 π p_T dp_Tdy) Total error
(GeV/c) (c²/GeV²) sqrt(stat² + syst²))
_______________________________________________________________________
0.85 0.0282844 0.00391852
1.1 0.0203431 0.00208146
1.3 0.0150828 0.00159
1.5 0.0110363 0.00135694
1.7 0.00611259 0.000517444
1.90 0.00427297 0.000328811
2.1 0.00278368 0.000234659
2.3 0.00176724 0.000324129
2.5 0.00111126 0.000156948
2.7 0.000615186 7.92518e-05
2.95 0.000340113 3.55421e-05
3.3 0.00017923 2.32535e-05
3.75 5.86408e-05 1.13199e-05
4.25 1.57152e-05 5.98252e-06

// 60-80% centrality **************************************************
_______________________________________________________________________
Pt 1/N_event d² N / (2 π p_T dp_Tdy) Total error
(GeV/c) (c²/GeV²) sqrt(stat² + syst²))
_______________________________________________________________________
0.95 0.00662986 0.00102718
1.4 0.00341604 0.000336081
1.8 0.00135122 0.000129753
2.2 0.000404763 6.25641e-05
2.75 0.000118336 2.17304e-05
3.55 1.87028e-05 8.61837e-06
5 1.20645e-06 7.9229e-07

Figure 1) Omega- + Omega+ pT distribution

// 0-5% centrality ****************************************************
_______________________________________________________________________
  Pt            1/N_event d² N / (2 π p_T dp_Tdy)        Total  error
(GeV/c)             (c²/GeV²)                 sqrt(stat² + syst²))
_______________________________________________________________________
 1.3125             0.0303413                    0.0041888
 1.9375             0.01153634                   0.0009862
 2.5625             0.0037152                    0.0003351
 3.1875             0.0010574                    0.00012552
 4.0                9.42706e-5                   2.162e-5

// 20-40% centrality **************************************************
_______________________________________________________________________
  Pt            1/N_event d² N / (2 π p_T dp_Tdy)        Total  error
(GeV/c)             (c²/GeV²)                 sqrt(stat² + syst²))
_______________________________________________________________________
 1.3125             0.00968729                   0.00190991
 1.9375             0.00391937                   0.00045125
 2.5625             0.00106905                   0.00013498
 3.1875             0.00027221                   5.0427e-05
 4.0                3.3585e-05                   1.2267e-05

// 40-60% centrality **************************************************
_______________________________________________________________________
  Pt            1/N_event d² N / (2 π p_T dp_Tdy)        Total  error
(GeV/c)             (c²/GeV²)                 sqrt(stat² + syst²))
_______________________________________________________________________
 1.3125             0.00412033                   0.00085383
 1.9375             0.0012071                    0.00016616
 2.5625             0.000422879                  5.88156e-05
 3.1875             6.57636e-05                  1.78815e-05
 4.0                1.326533e-05                 5.417069e-06

Figure 2a) Ratio [((dN/dy)/Npart)(x%)]/[((dN/dy)/Npart)(60-80%)] vs centrality

Centrality	Ratio (pbar) Error Stat only
0-5%	1.1631+/-0.0263
5-10%	1.1000+/-0.0328
10-20%	1.0545+/-0.0408
20-30%	1.0495+/-0.0647
30-40%	0.9982+/-0.0874
40-60%	0.9829+/-0.1583
60-80%	1.0000+/- 0.311

Centrality	Ratio (Xi+) Error stat only	Ratio (Lambda bar) Error Stat only
0-5%	1.7812+/-0.0473	1.5636+/-0.0164
10-20%	1.6576+/-0.1027	1.4219+/-0.0518
20-40%	1.5006+/-0.0907	1.3251+/-0.0753
40-60%	1.2574+/-0.1799	1.1399+/-0.1554
60-80%	1.0000+/-0.2800	1.000+/- 1.2868

Figure 2b) gamma_s vs centrality

Centrality	gamma_s
0-5%	0.99+/-0.08
10-20%	0.93+/-0.06
20-40%	0.94+/-0.06
40-60%	0.87+/-0.05
60-80%	0.77+/-0.05

Figure 3) RCP

Lambda+Lambdabar R_CP
	(dN/dp_Tdη/< N_bin>)\|_cent/(dN/dp_Tdη/< N_bin>)\|_periph
p_T (GeV/c)	0-5/40-60% <N_bin>[1.0+0.23-0.23] <N_part>[0.50+0.08-0.08]
0.500000	0.505000+/-0.077000
0.700000	0.545000+/-0.053000
0.900000	0.573000+/-0.048000
1.100000	0.643000+/-0.052000
1.300000	0.750000+/-0.079000
1.500000	0.795000+/-0.068000
1.700000	0.849000+/-0.074000
1.900000	0.899000+/-0.081000
2.100000	0.813000+/-0.069000
2.300000	0.854000+/-0.077000
2.500000	0.870000+/-0.068000
2.700000	0.876000+/-0.095000
2.900000	0.855000+/-0.097000
3.170000	0.857000+/-0.140000
3.580000	0.738000+/-0.120000
4.100000	0.698000+/-0.098000
4.750000	0.503000+/-0.094000
5.550000	0.573000+/-0.048000
Pt (GeV/c)	Xi- + Xi+ R_CP
0.85	0.584356+/-0.06519
1.1	0.68906+/-0.06017
1.3	0.70959+/-0.04524
1.5	0.720529+/-0.04229
1.7	0.823698+/-0.04751
1.9	0.762437+/-0.04276
2.1	0.811106+/-0.05177
2.3	0.834919+/-0.059994
2.5	0.778824+/-0.063577
2.7	0.862488+/-0.08477
2.9	0.851617+/-0.0824377
3.25	0.628434+/-0.074146
3.75	0.625024+/-0.107001
Pt (GeV/c)	Omega- + Omega+ R_CP
1.3125	0.682825+/-0.17055
1.9375	0.88622+/-0.1435
2.5625	0.814663+/-0.13504
3.1875	1.49101+/-0.44196
4.0	0.658972+/-0.27214

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This page was last updated on Fri, 01 Dec 2006 21:33:05 GMT

Scaling properties of hyperon production in Au+Au collisions at s(NN)**(1/2) = 200-GeV J. Adams et al., Phys. Rev. Lett. 98, 062301 (2007).

Scaling properties of hyperon production in Au+Au collisions at s(NN)**(1/2) = 200-GeV
J. Adams et al., Phys. Rev. Lett. 98, 062301 (2007).