CLAS Physics Database

Measurement E102M186

Experiment: E-89-039
Year: 2007

Measurement comment:

Electron beam energy is 1.515 Gev. Fitted cross section asymmetry between phi=0 and 180 degrees. From fit to angular xs with constraint that xs be positive over all phi.
Spokespersons: S. Dytman, K. Giovanetti
Reaction: ep → η p
Polarization: none
Quantity: AsymLT
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) AsymLT uncertainty syst. uncert.
-0.9 0.195 None 0.101
-0.7 0.03 None 0.053
-0.5 0.398 None 0.012
-0.3 1.0 None 0.0
-0.1 0.183 None 0.112
0.1 0.086 None 0.048
0.3 0.026 None 0.003
0.5 -0.085 None 0.021
0.7 0.078 None 0.008
0.9 1.0 None 0.0