CLAS Physics Database

Measurement E102M68

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: 1.61 — 1.63 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 0.141 0.035
-0.4 15.0 0.142 0.034
0.0 15.0 0.054 0.027
0.4 15.0 0.041 0.024
0.8 15.0 -0.028 0.022
-0.8 45.0 0.171 0.032
-0.4 45.0 0.131 0.04
0.0 45.0 0.085 0.037
0.4 45.0 0.007 0.033
0.8 45.0 0.081 0.029
-0.8 75.0 0.119 0.035
-0.4 75.0 0.171 0.051
0.0 75.0 0.013 0.044
0.4 75.0 0.04 0.042
0.8 75.0 0.009 0.02
-0.8 105.0 0.164 0.039
-0.4 105.0 0.057 0.052
0.0 105.0 0.038 0.088
0.4 105.0 -0.017 0.038
0.8 105.0 0.084 0.057
-0.8 135.0 0.121 0.033
-0.4 135.0 0.061 0.05
0.8 135.0 -0.037 0.036
-0.8 165.0 0.071 0.027
-0.4 165.0 0.11 0.045
0.0 165.0 0.101 0.102
0.4 165.0 -0.023 0.044
0.8 165.0 -0.003 0.031