CLAS Physics Database

Measurement E102M69

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: 2.1 — 2.9 GeV2
W: 1.63 — 1.65 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 0.08 0.02
-0.4 15.0 0.055 0.022
0.0 15.0 0.097 0.028
0.4 15.0 0.001 0.024
0.8 15.0 0.039 0.025
-0.8 45.0 0.081 0.021
-0.4 45.0 0.055 0.025
0.0 45.0 0.09 0.03
0.4 45.0 0.039 0.025
0.8 45.0 0.039 0.023
-0.8 75.0 0.052 0.025
-0.4 75.0 0.082 0.029
0.0 75.0 0.053 0.043
0.4 75.0 0.026 0.032
0.8 75.0 0.021 0.025
-0.8 105.0 0.087 0.031
-0.4 105.0 0.011 0.07
0.0 105.0 0.036 0.064
0.4 105.0 -0.022 0.059
0.8 105.0 0.023 0.042
-0.8 135.0 0.051 0.021
-0.4 135.0 0.108 0.074
0.8 135.0 0.111 0.086
-0.8 165.0 0.113 0.041
-0.4 165.0 -0.046 0.035
0.8 165.0 -0.011 0.028