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Measurement E103M1

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Experiment: g7a: Search for medium modification of light vector mesons off nuclei, 2007

Spokespersons: D. Weygand, C. Djalali, M. Kossov

Publication:

Quantity measured: dY/dM(e+, e), counts/12MeV
Differential yield, where M(e+,e) is invariant mass of e+ and e.
Beam: γ, polarization: none
Target: d (Z=1, A=2), polarization: none
Final state: ρ + X, polarization: none

Eγ : 0 — 3.8 GeV
Ebeam : 4 GeV

Observable quantity measured (Y axis): dY/dM(e+, e), counts/12MeV
Plot measurement data

Parameter (X axis): M(e+,e), GeV

Click here to get data in text file, delimited with tabs.

Measured data:

M(e+,e),
GeV
dY/dM(e+, e),
counts/12MeV
Data errors,
counts/12MeV
0.006 0 1
0.018 0 1
0.03 0 1
0.042 0 1
0.054 0 1
0.066 0 1
0.078 0 1
0.09 0 1
0.102 0 1
0.114 0 1
0.126 0.68 1
0.138 1 1
0.15 1 1
0.162 0.68 1
0.174 0.68 1
0.186 1.04 1.4142135
0.198 0.68 1
0.21 2.0799999 2
0.222 0 1
0.234 1.1200001 2
0.246 3.1200001 2.4494898
0.258 5.7600002 2.8284271
0.27 5.1199999 2.8284271
0.282 0.2800002 2.6457512
0.294 6.96 3.7416575
0.306 3.8800001 3
0.318 3.8800001 3
0.33 5.96 3.6055512
0.342 5.2400002 3.3166249
0.354 12.8000002 4
0.366 5.4000006 3.8729835
0.378 10.5599995 4
0.39 6.6400003 3.7416575
0.402 15.2000008 4.472136
0.414 14.7600002 5
0.426 17.6800003 5.0990195
0.438 22.6800003 5.5677643
0.45 36.5600014 6.4807405
0.462 16.7600002 5.1961522
0.474 29.2000008 6.4807405
0.486 22.7600002 5.7445626
0.498 26.3600006 5.91608
0.51 30.3600006 6.244998
0.522 34.1199989 6.7082038
0.534 34.7999992 6.78233
0.546 49.7999992 7.8102498
0.558 32.7999992 6.6332498
0.57 38.3600006 6.8556547
0.582 49 7.5498343
0.594 43.3600006 7.2111025
0.606 45.2400017 7.1414285
0.618 52.9199982 7.6811457
0.63 66.1600037 8.3666
0.642 35 6.5574384
0.654 69.6399994 8.7749643
0.666 52.4400024 7.937254
0.678 53.5200005 7.6157732
0.69 92.4800034 9.7979593
0.702 89.2399979 9.7467947
0.714 88.5599976 9.6953602
0.726 102.4800034 10.2956305
0.738 91.5199966 9.7979593
0.75 119.8399963 11.1355286
0.762 130.1600037 11.5758371
0.774 238.4400024 15.5241747
0.786 289.7999878 17.1172428
0.798 117.0800018 10.9087124
0.81 62.5200005 8.1853523
0.822 37.4000015 6.244998
0.834 40.1199989 6.5574384
0.846 24.7600002 5.1961522
0.858 28.7600002 5.5677643
0.87 28.1200008 5.5677643
0.882 20.4400005 4.7958317
0.894 17.3999996 4.3588991
0.906 12.7200003 3.7416575
0.918 5.7600002 2.8284271
0.93 12.6800003 3.6055512
0.942 15.7200003 4.1231055
0.954 11.7200003 3.6055512
0.966 8.7200003 3.1622777
0.978 14.7200003 4
0.99 17 4.1231055
1.002 12.6800003 3.6055512
1.014 45.0400009 6.78233
1.026 30.3600006 5.5677643
1.038 3.3600001 2
1.05 7.6799998 2.8284271
1.062 9.3599997 3.1622777
1.074 3.3600001 2
1.086 4.04 2.236068
1.098 3.72 2.236068
1.11 8 2.8284271
1.122 4 2
1.134 3.6800001 2
1.146 4 2
1.158 4 2
1.17 2.6800001 1.7320508
1.182 0.36 1
1.194 2 1.4142135