CLAS Physics Database

Measurement E102M39

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: 1.55 — 1.57 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 syst. uncert.
-0.8 15.0 0.567 0.062 0.022
-0.4 15.0 0.542 0.06 0.046
0.0 15.0 0.605 0.061 0.046
0.4 15.0 0.381 0.054 0.023
0.8 15.0 0.246 0.048 0.022
-0.8 45.0 0.597 0.064 0.036
-0.4 45.0 0.535 0.057 0.02
0.0 45.0 0.481 0.057 0.054
0.4 45.0 0.375 0.054 0.036
0.8 45.0 0.374 0.054 0.02
-0.8 75.0 0.501 0.055 0.031
-0.4 75.0 0.462 0.059 0.025
0.0 75.0 0.587 0.08 0.118
0.4 75.0 0.406 0.072 0.07
0.8 75.0 0.371 0.059 0.046
-0.8 105.0 0.472 0.051 0.039
-0.4 105.0 0.541 0.077 0.076
0.0 105.0 0.437 0.106 0.072
0.4 105.0 0.3 0.11 0.078
0.8 105.0 0.272 0.067 0.021
-0.8 135.0 0.53 0.057 0.008
-0.4 135.0 0.423 0.064 0.028
0.0 135.0 0.549 0.114 0.14
0.4 135.0 0.494 0.124 0.175
0.8 135.0 0.304 0.067 0.045
-0.8 165.0 0.313 0.043 0.008
-0.4 165.0 0.374 0.05 0.007
0.0 165.0 0.363 0.065 0.029
0.4 165.0 0.403 0.067 0.047
0.8 165.0 0.385 0.056 0.038