Open Charm Yields in d+Au Collisions at sqrt(sNN) = 200 GeV
J. Adams et al., Phys. Rev. Lett. 94 , 062301 (2005).

Figure 1: (a) Invariant mass distributions of kaon-pion pairs

Invariant mass disbutions of kaon-pion pairs after mixed-event background subtracted (solid circles) and after two-step background subtracted (open circles).(0.01 MeV/c2 bin width in M(Kpi))

M(Kpi) (GeV/c2) solid circles open circles
1.685 4102.83 1802.67
1.695 7106.99 1786.62
1.705 7545.57 1769.76
1.715 8468.07 1754.1
1.725 11213.7 1737.65
1.735 15528.7 1722.13
1.745 12122.9 1705.26
1.755 15110.1 1689.66
1.765 14516.5 1673.77
1.775 14989.4 1657.97
1.785 15385.9 1641.7
1.795 16763 1626.1
1.805 15411.9 1610.61
1.815 18526.7 1595.8
1.825 18431.3 1580.53
1.835 18581.4 1564.88
1.845 23190.5 1551.57
1.855 25678.8 1537.12
1.865 27700.5 1522.8
1.875 24923.4 1506.88
1.885 26061 1492.43
1.895 23185.3 1477.35
1.905 21989.5 1462.32
1.915 25845 1448.8
1.925 25806.5 1434.89
1.935 27349.7 1420.88
1.945 28277.5 1407.19
1.955 29953.1 1394.24
1.965 28700.8 1380.04
1.975 30594.1 1366.86
1.985 30481.3 1353.83
1.995 30324.7 1340.22
2.005 33150 1328
2.015 32372.6 1314.25
2.025 30450.3 1300.84
2.035 32382.4 1288.6

Figure 2: Inclusive electrons pT spectra and background contributions

Inclusive electron spectra and background contribution and ratios of data over measured background (statistical error only). black - TOF + dE/dx ; blue - dE/dx only ( systematic uncertainties of total background are 20% in both p+p and d+Au collisions ).

d+Au collisions
pT(GeV/c) inclusive electron total bkgd gamma pi0 eta ratio(data/background)
0.3-0.4 0.143 +/- 0.0168 0.15 0.12 0.027 0.0052 0.95 +/- 0.11
0.4-0.5 0.0647 +/- 0.00301 0.066 0.053 0.011 0.0023 0.98 +/- 0.05
0.5-0.6 0.0295 +/- 0.00146 0.033 0.027 0.0052 0.0012 0.89 +/- 0.05
0.6-0.7 0.0138 +/- 0.000719 0.016 0.013 0.0028 6.3e-4 0.86 +/- 0.05
0.7-0.8 0.00800 +/-0.000468 0.0090 0.0070 0.0015 3.5e-4 0.89 +/- 0.05
0.8-0.9 0.00423 +/-0.000287 0.0048 0.0038 7.8e-4 1.9e-4 0.88 +/- 0.06
0.9-1.0 0.00274 +/-0.000205 0.0026 0.0020 4.9e-4 1.2e-4 1.05 +/- 0.08
1.0-1.2 0.00118 +/-7.89e-05 0.0011 9.0e-4 1.8e-4 4.6e-5 1.07 +/- 0.07
1.2-1.4 0.000490 +/- 4.52e-05 4.4e-4 3.5e-4 7.4e-5 1.8e-5 1.11 +/- 0.10
1.4-1.6 0.000239 +/- 2.81e-05 1.9e-4 1.5e-4 3.0e-5 7.5e-6 1.26 +/- 0.15
1.6-1.8 0.000125 +/- 1.89e-05 8.5e-5 6.5e-5 1.3e-5 3.5e-6 1.47 +/- 0.22
1.8-2.0 5.43e-05 +/- 1.17e-05 3.8e-5 3.1e-5 6.1e-6 1.4e-6 1.43 +/- 0.32
2.0-3.0 1.19e-05 +/- 2.43e-06 7.2e-6 5.9e-6 1.2e-6 2.8e-7 1.65 +/- 0.33
2.0-2.4 2.73e-5 +/- 0.12e-5 1.6e-5 - - - 1.70 +/- 0.07
2.4-3.0 6.18e-6 +/- 0.37e-6 4.2e-6 - - - 1.47 +/- 0.09
3.0-4.0 7.32e-7 +/- 0.68e-7 4.4e-7 3.5e-7 7.0e-8 1.7e-8 1.65 +/- 0.15
p+p collisions
pT(GeV/c) inclusive electron total bkgd gamma pi0 eta ratio(data/background)
0.3-0.4 0.0274 +/- 0.00144 0.033 0.026 0.0063 0.0011 0.83 +/- 0.04
0.4-0.5 0.0123 +/- 0.000720 0.012 0.0097 0.0022 4.2e-4 1.03 +/- 0.06
0.5-0.6 0.00544 +/-0.000389 0.0052 0.0041 8.9e-4 1.9e-4 1.05 +/- 0.08
0.6-0.7 0.00213+/-0.000182 0.0023 0.0018 3.8e-4 8.4e-5 0.93 +/- 0.08
0.7-0.8 0.00124 +/- 0.000137 0.0011 8.8e-4 1.9e-4 4.4e-5 1.13 +/- 0.13
0.8-0.9 0.000593 +/- 7.87e-05 5.3e-4 4.0e-4 9.0e-5 2.1e-5 1.12 +/- 0.15
0.9-1.0 0.000440 +/- 6.60e-05 2.9e-4 2.2e-4 5.1e-5 1.2e-5 1.52 +/- 0.23
1.0-1.2 0.000138 +/- 2.22e-05 1.1e-4 8.6e-5 2.1e-5 5.2e-6 1.25 +/- 0.20
1.2-1.6 3.64e-05 +/- 7.32e-06 2.6e-5 2.0e-5 5.3e-6 1.3e-6 1.41 +/- 0.28
1.6-2.0 1.07e-05 +/- 3.40e-06 6.1e-6 4.9e-6 1.1e-6 2.8e-7 1.74 +/- 0.55
2.0-3.0 1.32e-06 +/- 6.58e-07 5.9e-7 4.6e-7 9.2e-8 2.4e-8 2.24 +/- 1.12
2.0-2.4 3.05e-06 +/- 0.54e-06 1.5e-6 - - - 2.02 +/- 0.36
2.4-3.0 5.35e-07 +/- 1.43e-07 3.4e-7 - - - 1.58 +/- 0.42
3.0-4.0 1.48e-07 +/- 0.47e-07 7.8e-8 6.5e-8 1.2e-8 3.0e-9 1.90+/- 0.60

Figure 3: D0 and background subtracted electron spectra

Errors listed below are statistical only.

pT (GeV/c) (D0+D0bar)/2 yield (c2/GeV2)
0.1-0.5 6.78e-3 +/- 1.93e-3
0.5-1.0 3.29e-3 +/- 1.02e-3
1.0-1.5 2.16e-3 +/- 0.55e-3
1.5-3.0 2.17e-4 +/- 0.94e-4

black - TOF + dE/dx ; blue - dE/dx only
The numbers listed below in the yield columns are yield +/- statistical error +/- systematical error.

pT (GeV/c) dAu yield (c2/GeV2) pT (GeV/c) pp NSD yield (c2/GeV2)
1.0-1.2 1.30e-4 +/- 0.71e-4 +/- 0.83e-4 1.0-1.2 2.23e-5 +/- 1.36e-5 +/- 1.43e-5
1.2-1.4 5.52e-5 +/- 3.66e-5 +/- 2.41e-5 1.2-1.6 7.02e-6 +/- 4.51e-6 +/- 3.30e-6
1.4-1.6 6.42e-5 +/- 2.43e-5 +/- 3.40e-5 - -
1.6-1.8 3.88e-5 +/- 1.61e-5 +/- 0.88e-5 1.6-2.0 3.59e-6 +/- 2.05e-6 +/- 0.79e-6
1.8-2.0 1.55e-5 +/- 0.85e-5 +/- 0.26e-5 - -
2.0-3.0 4.82e-6 +/- 1.99e-6 +/- 0.47e-6 2.0-3.0 7.16e-7 +/- 4.57e-7 +/- 0.70e-7
2.0-2.4 7.53e-6 +/- 1.12e-6 +/- 2.41e-6 2.0-2.4 1.10e-6 +/- 0.30e-6 +/- 0.36e-6
2.4-3.0 1.19e-6 +/- 0.41e-6 +/- 0.36e-6 2.4-3.0 1.89e-7 +/- 0.85e-7 +/- 0.68e-7
3.0-4.0 2.45e-7 +/- 1.22e-7 +/- 1.72e-7 3.0-4.0 4.11e-8 +/- 3.02e-8 +/- 1.68e-8

Figure 4: Total charm cross section with collision energies.

Total charm production cross sections per nucleon-nucleon collision as a function of collision energies. The data points at low energy (<60 GeV) from references[12] were multiplied by 1.5 to take Ds and Lambdac into account. The error bars are combining statistical and systematical uncertainties.

sqrt(S) (GeV) sigma (mub)
19.4 2.6 +/- 1.2
19.4 5.9 +/- 3.8
21.7 13.0 +/- 2.4
22.9 8.4 +/- 2.6
25.6 33 +/- 14
25.6 17.0 +/- 3.0
26.0 23 +/- 12
26.0 37 +/- 18
27.4 22.2 +/- 3.0
27.4 46 +/- 27
38.7 36 +/- 12
38.7 52 +/- 15
130 420 +/- 260
200 1400 +/- 470
630 700 +/- 610