Energy dependence of acceptance-corrected dielectron excess mass spectrum at mid-rapidity in Au+Au collisions at $\sqrt{s_{NN}} = 19.6$ and 200 GeV

[Figure 1|Figure 4|Figure 5|Figure 6]


Figure 1

m_{ee} (GeV/c^{2}) dm_{ee} Unlike-sign Like-sign Signal stat.err S/B
0.0050.005103460598.879102861228.084171.756
0.0150.0051030801661.44101418228.79461.0422
0.0250.00525033.52562.9122470.6117.3258.76763
0.0350.005211233296.6317826.4110.3395.40745
0.0450.005382044103.9534100.1145.2568.30908
0.0550.00521634.54873.6316760.9114.9623.43909
0.0650.0059761.55512.84248.787.18530.770697
0.0750.0058805.56219.562585.9486.50070.415774
0.0850.0058622.56803.021819.4887.59280.267452
0.0950.0058651.57646.321005.1890.11860.131459
0.1050.00586858078.4606.59791.34590.0750888
0.11750.00758891.338532.77358.56576.10070.0420222
0.14250.01759632.579267.05365.51951.88090.0394428
0.2050.04511609.111400.2208.82735.72750.0183178
0.3250.07515122.515047.575.050531.71410.00498758
0.50.120236.720154.582.222831.76890.00407964
0.65750.057516193.516112.680.881237.46140.00501975
0.7450.0311974.311883.690.759744.58010.00763741
0.7850.011031510090.1224.86171.46040.0222853
0.81750.02258837.678794.9742.700944.23580.00485515
0.9150.0755758.035738.8319.204519.57390.00334641
10.013835.753741.494.350943.50410.0252181
1.0150.0053721.53477.54243.95760.01570.0701522
1.030.013313.253213.15100.09540.38450.0311517
1.4450.405774.019771.6022.416243.090230.00313145
2.33750.487517.235916.66440.5715210.4181740.034296
2.9250.11.1251.00230.1226960.24080.122414
3.04750.02251.777780.533161.244620.496062.33442
3.0850.0152.333330.4708451.862490.7153253.95563
3.150.050.850.4914040.3585960.2562120.729738
3.350.150.2666670.2234650.04320180.09243990.193327
3.750.250.120.03189160.08810840.03976492.76275
510.002500.00250.00250

Figure 4

Figure 4

m_{ee} dm_{ee} dN/dm_{ee} (GeV/c^{2})^{-1} stat. err sys.err
0.005 0.005 2.77767 0.00736432 0.492205
0.015 0.005 0.791436 0.00418253 0.140243
0.025 0.005 0.415992 0.00334596 0.0737139
0.035 0.005 0.270997 0.0029415 0.0480208
0.045 0.005 0.203594 0.00273401 0.036077
0.055 0.005 0.159721 0.00258069 0.0283027
0.065 0.005 0.11375 0.00250939 0.0201566
0.075 0.005 0.0817201 0.00251398 0.0144808
0.085 0.005 0.0586162 0.00257128 0.0103868
0.095 0.005 0.0308852 0.00255224 0.00547287
0.105 0.005 0.019581 0.00265432 0.00346975
0.1175 0.0075 0.0123954 0.00222841 0.00219647
0.1425 0.0175 0.0116202 0.00152262 0.00205911
0.205 0.045 0.00658323 0.0010453 0.00116655
0.325 0.075 0.00235288 0.000949304 0.000416932
0.5 0.1 0.00232308 0.00097919 0.00041165
0.6575 0.0575 0.00244821 0.00115689 0.000433825
0.745 0.03 0.00339613 0.00137798 0.000601796
0.785 0.01 0.00643208 0.00221899 0.00113977
0.8175 0.0225 0.00132075 0.00138285 0.000346681
0.915 0.075 0.000499415 0.000629794 0.00013109
1 0.01 0.00399445 0.001443 0.0010485
1.015 0.005 0.0106211 0.0020013 0.00278792
1.03 0.01 0.00283512 0.00135986 0.000744186
1.445 0.405 0.000149491 0.000109558 3.92395e-05
2.3375 0.4875 1.74669e-05 1.92661e-05 4.58484e-06
2.925 0.1 9.09604e-06 1.1979e-05 2.3876e-06
3.0475 0.0225 4.39881e-05 2.5893e-05 1.15463e-05
3.085 0.015 0.000103248 2.93831e-05 2.71014e-05
3.15 0.05 2.03344e-05 1.38592e-05 5.33754e-06
cocktail
m_{ee} dm_{ee} sum (GeV/c^{2})^{-1} pi0 eta eta' omega phi J/psi ccbar Drell-Yan
0.010.021.919581.698810.1947210.00190230.02335510.00078616803.25194e-060
0.030.020.3669420.3218390.03975160.0003965780.004783740.0001605709.82634e-060
0.050.020.1737430.1475560.02303360.0002320770.002813799.17143e-0501.60797e-050
0.070.020.09424450.07599070.01604940.0001622320.001954336.56197e-0502.21807e-050
0.090.020.04777760.03406480.01199490.0001250230.001514974.98975e-0502.80324e-050
0.110.020.02022190.008967480.009867419.97751e-050.001212594.07319e-0503.39061e-050
0.130.020.009550080.0003493820.008021818.71058e-050.001017223.49773e-0503.95883e-050
0.150.020.0078112900.006792387.45092e-050.0008696992.97187e-0504.49808e-050
0.170.020.0064687100.005542616.26567e-050.000786882.62742e-0505.02966e-050
0.190.020.0058433400.005022355.98614e-050.0006822792.34047e-0505.5444e-050
0.210.020.0051588500.0044125.36176e-050.0006121062.12793e-0505.98469e-050
0.230.020.0044208800.003728984.79545e-050.000559511.99968e-0506.44395e-050
0.250.020.0040121700.003345334.57401e-050.000534351.80294e-0506.87212e-050
0.270.020.0033639500.002734974.28178e-050.0004969181.6542e-0507.26952e-050
0.290.020.0031700400.002575123.9587e-050.0004622561.61644e-0507.69174e-050
0.310.020.0026901900.002127523.71003e-050.000430511.42289e-0508.08297e-050
0.330.020.0024873500.00193573.56482e-050.0004172641.41175e-0508.46251e-050
0.350.020.0022787700.001743873.56119e-050.0003974091.33241e-0508.85535e-050
0.370.020.0020255800.001508453.47951e-050.0003765911.35463e-0509.21943e-050
0.390.020.0016666800.001136423.35609e-050.0003870641.26313e-0509.70014e-050
0.410.020.0014797400.0009649433.41236e-050.0003676821.17468e-0500.0001012480
0.430.020.0012420300.0007353333.37424e-050.000356211.03588e-0500.0001063860
0.450.020.0010100.0004824713.40873e-050.0003745127.54558e-0600.0001113820
0.470.020.00082340400.0002964583.47044e-050.0003724453.53262e-061.29492e-090.0001162620
0.490.020.00069651700.0001656683.69188e-050.0003704172.54163e-0600.0001209710
0.510.020.00060306206.68484e-053.75359e-050.0003698333.60618e-0600.0001252390
0.530.020.00055743801.74387e-053.88428e-050.0003679894.50115e-0600.0001286670
0.550.020.000533409004.13476e-050.0003548975.2645e-0600.0001319010
0.570.020.000532537004.20918e-050.0003497136.58063e-0600.0001341510
0.590.020.000516734004.53045e-050.0003276877.50192e-0600.0001362410
0.610.020.000486425004.86987e-050.0002922989.08127e-0600.0001363460
0.630.020.000399547005.271e-050.0001983121.06343e-053.88476e-090.0001378870
0.650.020.000291346005.68303e-058.42412e-051.30823e-051.29492e-090.0001371910
0.670.020.000293845006.08053e-058.2602e-051.39246e-053.88476e-090.0001365090
0.690.020.000330624006.2094e-050.0001167381.64516e-052.58984e-090.0001353380
0.710.020.000388144006.0769e-050.0001754441.81099e-0500.0001338210
0.730.020.000505726005.41984e-050.0002971432.26374e-051.29492e-090.0001317460
0.750.020.000875228004.0676e-050.0006810932.45063e-051.29492e-090.0001289510
0.770.020.00370939002.65002e-050.003528252.85599e-0500.0001260790
0.790.020.00462705001.492e-050.004455183.43509e-051.29492e-090.000122590
0.810.020.000681023007.69595e-060.0005131284.06156e-052.58984e-090.0001195810
0.830.020.000306463004.12024e-060.0001394034.64066e-053.88476e-090.0001165290
0.850.020.000234604001.72433e-066.73505e-055.37769e-055.17968e-090.0001117470
0.870.020.000215805008.7124e-073.8191e-056.83069e-056.4746e-090.0001084290
0.890.020.000208866003.99318e-072.40342e-058.04153e-053.88476e-090.0001040140
0.910.020.000225405005.44525e-081.68687e-050.0001081596.4746e-090.0001003160
0.930.020.0002552890001.35597e-050.0001452217.76952e-099.65005e-050
0.950.020.0003116330001.09721e-050.0002087111.03594e-089.19392e-050
0.970.020.000460024001.81508e-088.08604e-060.0003636722.20136e-088.82255e-050
0.990.020.00101780007.04108e-060.0009266841.81289e-088.40551e-050
1.010.020.005474740005.84683e-060.005388351.81289e-088.052e-050
1.030.020.004052210005.74731e-060.003969993.75527e-087.6436e-050
1.050.020.0004557140003.93106e-060.000359254.14374e-087.26184e-051.98731e-05
1.070.020.0002082160003.8813e-069.72354e-054.01425e-086.89693e-053.80895e-05
1.090.020.000145830003.30906e-064.11421e-056.60409e-086.532e-053.59929e-05
1.110.020.0001228080002.96073e-062.35587e-054.7912e-086.23164e-053.3924e-05
1.130.020.0001088850002.46313e-061.53987e-055.56816e-085.88813e-053.20863e-05
1.150.029.97444e-050002.21433e-061.08186e-057.12206e-085.62815e-053.03588e-05
1.170.029.21019e-050002.11481e-068.21263e-067.25155e-085.28408e-052.88612e-05
1.190.028.65593e-050002.13969e-066.37005e-066.99257e-085.03669e-052.76128e-05
1.210.027.93192e-050001.46793e-064.29057e-068.54647e-084.74893e-052.5986e-05
1.230.027.44845e-050001.34353e-064.00102e-069.06444e-084.44646e-052.45848e-05
1.250.026.99508e-050001.36841e-063.00077e-069.84139e-084.22345e-052.32487e-05
1.270.026.56382e-050001.26889e-062.50064e-061.06183e-073.97074e-052.2055e-05
1.290.026.22679e-050009.45445e-072.29006e-061.01004e-073.79276e-052.10038e-05
1.310.025.89181e-050001.09473e-062.23741e-061.03594e-073.55068e-051.99756e-05
1.330.025.50174e-050009.70325e-071.73729e-061.21722e-073.32658e-051.89223e-05
1.350.025.20204e-050009.70325e-071.57935e-061.23017e-073.14226e-051.7925e-05
1.370.024.9038e-050007.96164e-071.15819e-061.34672e-072.98197e-051.71293e-05
1.390.024.67812e-050009.45445e-071.34245e-061.39851e-072.79585e-051.6395e-05
1.410.024.35834e-050005.22483e-078.94966e-071.42441e-072.65131e-051.55104e-05
1.430.024.13573e-050005.97123e-071.00026e-061.43736e-072.47721e-051.48441e-05
1.450.023.90618e-050006.22003e-079.21288e-071.41146e-072.32132e-051.41642e-05
1.470.023.68e-050005.97123e-077.63353e-071.41146e-072.19274e-051.33709e-05
1.490.023.48106e-050005.22483e-077.89676e-071.51506e-072.06627e-051.26842e-05
1.510.023.28476e-050005.47363e-075.79095e-071.76109e-071.92918e-051.22532e-05
1.530.023.08867e-050004.72722e-077.10708e-071.48916e-071.80686e-051.14858e-05
1.550.022.93923e-050005.97123e-075.2645e-071.5798e-071.70562e-051.10545e-05
1.570.022.7523e-050005.72243e-074.2116e-071.56685e-071.59519e-051.0421e-05
1.590.022.62663e-050004.47842e-074.47483e-071.94238e-071.509e-051.00867e-05
1.610.022.4962e-050004.97602e-074.73805e-071.82584e-071.41457e-059.66224e-06
1.630.022.359e-050004.97602e-074.73805e-071.74814e-071.3201e-059.24277e-06
1.650.022.22366e-050002.73681e-075.52773e-071.91648e-071.24146e-058.80387e-06
1.670.022.10162e-050004.72722e-073.68515e-072.22726e-071.15747e-058.37756e-06
1.690.021.97835e-050003.98082e-074.47483e-072.03302e-071.07585e-057.97608e-06
1.710.021.84354e-050002.48801e-072.63225e-072.21431e-071.01713e-057.5307e-06
1.730.021.79702e-050002.98561e-073.94838e-072.20136e-079.68571e-067.37097e-06
1.750.021.68651e-050003.98082e-072.1058e-072.33086e-079.04556e-066.97776e-06
1.770.021.62267e-050004.22962e-073.68515e-072.25316e-078.4779e-066.73205e-06
1.790.021.50167e-050002.23921e-073.68515e-072.3697e-077.82396e-066.36331e-06
1.810.021.43845e-050003.23442e-072.89548e-072.3697e-077.37166e-066.16292e-06
1.830.021.34666e-050002.23921e-072.89548e-072.43445e-076.85322e-065.85642e-06
1.850.021.27842e-050002.98561e-072.1058e-072.4215e-076.43158e-065.60135e-06
1.870.021.20283e-050001.24401e-072.1058e-072.65459e-076.05203e-065.37579e-06
1.890.021.15414e-050002.23921e-071.84258e-072.92652e-075.6983e-065.14231e-06
1.910.021.09478e-050001.99041e-072.89548e-072.38265e-075.31358e-064.90739e-06
1.930.021.01639e-050001.24401e-071.57935e-072.73228e-074.89556e-064.71276e-06
1.950.029.81752e-060001.24401e-072.36903e-072.56394e-074.6709e-064.52893e-06
1.970.029.39293e-060002.73681e-072.36903e-073.06896e-074.3185e-064.25695e-06
1.990.028.78866e-060001.49281e-072.1058e-073.05601e-074.03137e-064.09183e-06
2.010.028.43831e-060002.23921e-071.57935e-072.65459e-073.81465e-063.97635e-06
2.030.028.01103e-060007.46404e-081.84258e-073.1855e-073.622e-063.81158e-06
2.050.027.68124e-060001.24401e-072.1058e-072.99127e-073.33448e-063.71265e-06
2.070.027.34779e-060001.74161e-072.1058e-073.19845e-073.12374e-063.51946e-06
2.090.026.85251e-060001.74161e-075.2645e-083.04306e-072.92965e-063.39175e-06
2.110.026.61111e-060001.24401e-071.57935e-073.83296e-072.69259e-063.25288e-06
2.130.026.48151e-060002.48801e-072.1058e-073.67757e-072.54251e-063.11186e-06
2.150.025.91172e-060004.97602e-087.89676e-083.71642e-072.37359e-063.03775e-06
2.170.025.77663e-060001.24401e-077.89676e-084.06605e-072.26633e-062.90033e-06
2.190.025.5168e-060001.24401e-075.2645e-084.35093e-072.11333e-062.79132e-06
2.210.025.353e-060001.49281e-071.0529e-074.59697e-071.96973e-062.66901e-06
2.230.024.99146e-060001.24401e-077.89676e-084.48042e-071.76458e-062.57547e-06
2.250.024.99477e-060002.23921e-071.31613e-074.67466e-071.71286e-062.45891e-06
2.270.024.50648e-060002.48801e-081.0529e-074.51927e-071.54138e-062.383e-06
2.290.024.59146e-060004.97602e-081.84258e-075.02429e-071.4864e-062.36861e-06
2.310.024.58077e-060001.49281e-072.36903e-075.33507e-071.42342e-062.23766e-06
2.330.024.2074e-060009.95205e-081.57935e-074.67466e-071.36174e-062.12074e-06
2.350.024.00009e-060001.24401e-072.63225e-085.67175e-071.21793e-062.06426e-06
2.370.023.82802e-060001.24401e-075.2645e-085.607e-071.11163e-061.97864e-06
2.390.023.72468e-060004.97602e-085.2645e-086.4228e-071.10029e-061.87971e-06
2.410.023.80189e-060009.95205e-081.57935e-076.31921e-071.05583e-061.85668e-06
2.430.023.58677e-060001.74161e-075.2645e-085.94368e-079.9885e-071.76675e-06
2.450.023.42212e-060004.97602e-085.2645e-086.83718e-079.13861e-071.72214e-06
2.470.023.19505e-060004.97602e-0806.96667e-078.14981e-071.63364e-06
2.490.023.29288e-060001.49281e-0707.47169e-078.24309e-071.57212e-06
2.510.023.09302e-06000007.49759e-077.16226e-071.52751e-06
2.530.023.17978e-06000008.24864e-076.6222e-071.50844e-06
2.550.023.06817e-06000008.66301e-076.4277e-071.43182e-06
2.570.022.9938e-06000008.8702e-076.09437e-071.31741e-06
2.590.023.11249e-06000009.34932e-075.97002e-071.35231e-06
2.610.022.89857e-06000009.60831e-075.50006e-071.3131e-06
2.630.022.96506e-06000001.09291e-064.68045e-071.25194e-06
2.650.022.84212e-06000001.11104e-064.36093e-071.19402e-06
2.670.022.9564e-06000001.19392e-064.27755e-071.15625e-06
2.690.023.06195e-06000001.34024e-064.0706e-071.11128e-06
2.710.022.90626e-06000001.36614e-064.08633e-071.10516e-06
2.730.023.06778e-06000001.55261e-063.59353e-071.02709e-06
2.750.023.02445e-06000001.61994e-063.26455e-079.77088e-07
2.770.023.14974e-06000001.72095e-063.06368e-079.67375e-07
2.790.023.312e-06000001.96828e-063.01294e-079.42912e-07
2.810.023.65511e-06000002.20266e-062.5922e-079.10894e-07
2.830.023.6399e-06000002.36323e-062.75907e-078.7348e-07
2.850.023.98062e-06000002.79703e-062.07958e-078.24913e-07
2.870.024.10964e-06000002.97702e-062.2005e-078.11602e-07
2.890.024.55404e-06000003.36938e-062.22325e-078.07285e-07
2.910.025.11772e-06000004.06734e-061.88242e-077.87499e-07
2.930.025.97695e-06000004.93106e-061.84712e-077.35335e-07
2.950.027.08479e-06000006.06152e-061.80136e-077.4217e-07
2.970.028.89674e-06000007.82132e-061.53628e-077.18426e-07
2.990.021.14473e-05000001.05394e-051.50442e-076.78494e-07
3.010.021.6602e-05000001.57022e-051.24977e-076.73817e-07
3.030.022.82098e-05000002.73202e-051.32769e-076.29567e-07
3.050.025.26977e-05000005.18382e-051.13795e-076.19854e-07
3.070.028.6238e-05000008.54997e-051.00033e-075.85677e-07
3.090.020.000106958000000.0001062031.07421e-075.71287e-07
3.110.029.38433e-05000009.31656e-058.75593e-085.40349e-07
3.130.025.96735e-05000005.8937e-059.01942e-085.43946e-07
3.150.022.89818e-05000002.83005e-058.28532e-085.20922e-07
3.170.021.30295e-05000001.22966e-056.98656e-084.86026e-07
3.190.026.22951e-06000005.56945e-067.6662e-084.80989e-07
3.210.023.6035e-06000002.90969e-066.42533e-084.75953e-07
3.230.022.41193e-06000001.83231e-067.83672e-084.50051e-07
3.250.021.77409e-06000001.146e-066.98215e-084.32423e-07
3.270.021.41695e-06000008.31339e-074.53893e-084.39258e-07
3.290.021.20002e-06000006.16382e-076.21207e-084.17673e-07
3.310.029.71428e-07000004.40273e-074.85554e-084.0796e-07
3.330.027.69643e-07000003.2373e-074.62274e-083.99685e-07
3.350.026.65834e-07000002.13662e-074.122e-083.61192e-07
3.370.026.52587e-07000001.86468e-074.54534e-083.70905e-07
3.390.026.36725e-07000001.61865e-074.29815e-083.55795e-07
3.410.026.06297e-07000001.41146e-073.43451e-083.51838e-07
3.430.025.94899e-07000001.08773e-074.30347e-083.40686e-07
3.450.024.86319e-07000007.38104e-083.75255e-083.22338e-07
3.470.024.79797e-07000006.86308e-083.07902e-083.29174e-07
3.490.024.41038e-07000005.69765e-083.03103e-083.03991e-07

Figure 5

Figure 5

Au+Au 19.6 GeV
m_{ee} dm_{ee} (d^{2}N/(dydm_{ee}))/(dN_{ch}/dy) (20 MeV/c^{2})^{-1} stat. err sys.err
0.28 0.12 1.41365e-07 1.53422e-07 1.23443e-07
0.5 0.1 4.01403e-07 2.63624e-07 1.12866e-07
0.6575 0.0575 4.03499e-07 2.27309e-07 8.64044e-08
0.7775 0.0625 2.44283e-07 5.63079e-08 2.39919e-08
0.94 0.1 5.01663e-08 3.8245e-08 1.62245e-08
1.445 0.405 1.23774e-08 1.68818e-08 6.0516e-09
2.3375 0.4875 1.35344e-09 2.23482e-09 1.46173e-09
Au+Au 200 GeV
m_{ee} dm_{ee} (d^{2}N/(dydm_{ee}))/(dN_{ch}/dy) (20 MeV/c^{2})^{-1} stat. err sys.err
0.255 0.055 4.81868e-07 2.45889e-07 1.0394e-06
0.355 0.045 8.81301e-07 2.59738e-07 5.77736e-07
0.455 0.055 8.14055e-07 2.02005e-07 3.32209e-07
0.57 0.06 5.27345e-07 1.41819e-07 2.23232e-07
0.71 0.08 1.53046e-07 3.37488e-08 6.49786e-08
0.9125 0.1225 1.81698e-08 2.15602e-08 2.1603e-08
1.2425 0.2075 2.38844e-08 9.05573e-09 1.26438e-08
1.7625 0.3125 8.44025e-09 4.33979e-09 5.99724e-09
2.4625 0.3875 2.05566e-09 1.73161e-09 1.83482e-09

Figure 6

Figure 6

From top to bottom: auau19 0-80%, auau200 0-10%, auau200 10-40%, auau200 40-80%, auau200 0-80%
dN_{ch}/dy (dN/dy)/(dN_{ch}/dy) stat. err sys.err
135 7.00433e-06 2.83168e-06 1.1913e-06
729 1.25305e-05 2.06045e-06 3.18453e-06
347 7.24291e-06 1.92197e-06 1.70977e-06
78.6 5.35181e-06 1.28781e-06 1.20084e-06
261 8.28954e-06 1.42527e-06 1.67269e-06
Frank Geurts