CLAS Physics Database

Measurement E102M103

Experiment: E-89-039
Year: 2007

Measurement comment:

Electron beam energy is 1.515 Gev. From fit to angular xs with constraint that fitted xs be positive over all phi.
Spokespersons: S. Dytman, K. Giovanetti
Reaction: ep → η p
Polarization: none
Quantity: dσ/dΩT+ε·dσ/dΩL
Q2: 0.2 — 0.4 GeV2
W: 1.59 — 1.61 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 //

Measurement data
cos(θ) dσ/dΩT+ε·dσ/dΩL, [μb/sr] uncertainty syst. uncert.
-0.9 0.536 None 0.069
-0.7 0.657 None 0.081
-0.5 0.615 None 0.033
-0.3 0.572 None 0.034
-0.1 0.585 None 0.061
0.1 0.704 None 0.047
0.3 0.531 None 0.049
0.5 0.416 None 0.02
0.7 0.334 None 0.018
0.9 0.258 None 0.023