CLAS Physics Database

Measurement E102M57

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: 1.91 — 1.93 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 0.015 0.013
-0.4 15.0 -0.013 0.013
0.0 15.0 0.006 0.02
0.4 15.0 0.029 0.024
0.8 15.0 0.072 0.022
-0.8 45.0 0.011 0.016
-0.4 45.0 -0.005 0.019
0.0 45.0 0.053 0.032
0.4 45.0 0.039 0.044
0.8 45.0 0.099 0.032
-0.8 75.0 0.012 0.017
-0.4 75.0 -0.012 0.018
0.0 75.0 0.011 0.018
0.4 75.0 0.085 0.023
0.8 75.0 0.114 0.029
-0.8 105.0 -0.007 0.017
-0.4 105.0 0.005 0.012
0.0 105.0 0.071 0.019
0.4 105.0 0.061 0.021
0.8 105.0 0.137 0.034
-0.8 135.0 0.021 0.033
-0.4 135.0 0.044 0.02
0.0 135.0 0.052 0.055
0.4 135.0 0.023 0.048
0.8 135.0 0.238 0.093
0.4 165.0 0.014 0.028
0.8 165.0 0.005 0.048