CLAS Physics Database

Measurement E102M51

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: 1.79 — 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 0.025 0.018
-0.4 15.0 0.017 0.016
0.0 15.0 0.019 0.019
0.4 15.0 0.04 0.025
0.8 15.0 0.083 0.022
-0.8 45.0 0.0 0.02
-0.4 45.0 -0.015 0.018
0.0 45.0 0.055 0.037
0.4 45.0 0.154 0.052
0.8 45.0 0.07 0.038
-0.8 75.0 0.02 0.022
0.0 75.0 0.1 0.044
0.4 75.0 0.11 0.032
0.8 75.0 0.055 0.028
-0.8 105.0 -0.062 0.082
-0.4 105.0 0.046 0.041
0.0 105.0 0.065 0.029
0.4 105.0 0.102 0.028
0.8 105.0 0.104 0.032
-0.8 135.0 0.054 0.035
-0.4 135.0 0.069 0.061
0.0 135.0 0.031 0.026
0.4 135.0 0.109 0.042
0.8 135.0 0.089 0.04
-0.8 165.0 -0.014 0.021