CLAS Physics Database

Measurement E102M56

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: 1.89 — 1.91 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 0.016 0.016
-0.4 15.0 0.017 0.015
0.0 15.0 0.014 0.016
0.4 15.0 0.049 0.021
0.8 15.0 0.051 0.019
-0.8 45.0 0.007 0.011
-0.4 45.0 0.026 0.019
0.0 45.0 0.074 0.028
0.4 45.0 0.02 0.059
0.8 45.0 0.035 0.03
-0.8 75.0 0.001 0.023
-0.4 75.0 -0.001 0.027
0.0 75.0 0.028 0.033
0.4 75.0 0.059 0.021
0.8 75.0 0.12 0.038
-0.8 105.0 0.003 0.027
-0.4 105.0 -0.021 0.017
0.0 105.0 0.087 0.025
0.4 105.0 0.043 0.024
0.8 105.0 0.203 0.051
-0.8 135.0 0.013 0.036
-0.4 135.0 0.025 0.019
0.0 135.0 0.016 0.043
0.4 135.0 0.117 0.112
0.8 135.0 0.088 0.065
-0.8 165.0 -0.047 0.024
0.4 165.0 0.035 0.071
0.8 165.0 0.087 0.078