CLAS Physics Database

Measurement E102M101

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: 1.55 — 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 //

Measurement data
cos(θ) dσ/dΩT+ε·dσ/dΩL, [μb/sr] uncertainty syst. uncert.
-0.9 0.855 None 0.037
-0.7 1.141 None 0.293
-0.5 0.996 None 0.071
-0.3 0.958 None 0.096
-0.1 0.835 None 0.038
0.1 0.895 None 0.043
0.3 0.858 None 0.028
0.5 0.742 None 0.032
0.7 0.695 None 0.092
0.9 0.648 None 0.059