CLAS Physics Database

Measurement E102M55

Experiment: E-89-039
Year: 2007

Measurement comment:

Electron beam energy is 4.056 GeV. Measurements are average of Phi* and 360-Phi*.
Spokespersons: S. Dytman, K. Giovanetti
Reaction: ep → η p
Polarization: none
Quantity: dσ/dΩ
Q2: 1.3 — 2.1 GeV2
W: 1.87 — 1.89 GeV
Publication:
H. Denizli, J. Mueller, S. Dytman, M.L. Leber, R.D. Levine, J. Miles, K.Y. Kim, and CLAS Collaboration Q2 dependence of the S11(1535) Photocoupling and Evidence for a P-wave resonance in η electroproduction //

Slice: cos(θ) = dimensionless

Measurement data
cos(θ) φ, [degree] dσ/dΩ, [μb/sr] uncertainty
-0.8 15.0 0.007 0.014
-0.4 15.0 0.001 0.014
0.0 15.0 0.024 0.022
0.4 15.0 0.042 0.024
0.8 15.0 0.052 0.024
-0.8 45.0 0.017 0.019
-0.4 45.0 0.073 0.031
0.0 45.0 0.023 0.023
0.4 45.0 0.092 0.041
0.8 45.0 0.064 0.035
-0.8 75.0 0.002 0.02
-0.4 75.0 0.045 0.031
0.0 75.0 0.093 0.041
0.4 75.0 0.059 0.027
0.8 75.0 0.103 0.03
-0.8 105.0 -0.003 0.049
-0.4 105.0 0.014 0.016
0.0 105.0 0.099 0.028
0.4 105.0 0.11 0.03
0.8 105.0 0.119 0.036
-0.4 135.0 0.024 0.027
0.0 135.0 0.035 0.043
0.8 135.0 0.1 0.078
-0.8 165.0 -0.025 0.032