CLAS Physics Database

Measurement E102M77

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: 1.79 — 1.81 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 0.012 0.013
-0.4 15.0 0.013 0.021
0.0 15.0 -0.002 0.021
0.4 15.0 0.056 0.037
0.8 15.0 0.029 0.019
-0.8 45.0 0.018 0.015
-0.4 45.0 -0.02 0.016
0.0 45.0 -0.003 0.025
0.4 45.0 -0.039 0.026
0.8 45.0 0.005 0.021
-0.8 75.0 0.026 0.03
-0.4 75.0 -0.004 0.034
0.0 75.0 0.002 0.027
0.4 75.0 0.036 0.046
0.8 75.0 0.034 0.027
-0.8 105.0 0.007 0.019
-0.4 105.0 0.026 0.035
0.0 105.0 0.031 0.033
0.4 105.0 0.027 0.027
0.8 105.0 0.021 0.017
-0.8 135.0 -0.002 0.033
-0.4 135.0 0.04 0.039
0.0 135.0 0.204 0.1
0.4 135.0 0.084 0.054
0.8 135.0 -0.018 0.035
-0.8 165.0 -0.004 0.01