CLAS Physics Database

Measurement E102M78

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: 1.81 — 1.83 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 0.019 0.012
-0.4 15.0 -0.006 0.014
0.0 15.0 -0.008 0.017
0.4 15.0 -0.006 0.029
0.8 15.0 0.017 0.016
-0.8 45.0 0.01 0.015
-0.4 45.0 0.01 0.02
0.0 45.0 -0.009 0.022
0.4 45.0 -0.024 0.026
0.8 45.0 0.019 0.025
-0.8 75.0 0.018 0.03
-0.4 75.0 0.006 0.031
0.0 75.0 0.042 0.024
0.4 75.0 0.065 0.041
0.8 75.0 0.031 0.025
-0.8 105.0 -0.002 0.017
-0.4 105.0 0.006 0.024
0.0 105.0 0.013 0.016
0.4 105.0 0.064 0.033
0.8 105.0 0.041 0.021
-0.8 135.0 0.036 0.035
-0.4 135.0 0.087 0.061
0.0 135.0 0.038 0.028
0.4 135.0 0.068 0.054
0.8 135.0 0.044 0.035
-0.8 165.0 0.015 0.037