CLAS Physics Database

Measurement E102M285

Experiment: E-89-039
Year: 2007

Measurement comment:

Electron beam energy is 2.567 Gev. Fitted cross section asymmetry between phi=0/180 and 90/270 degrees. 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: AsymTT
Q2: 0.6 — 1.0 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 //

Measurement data
cos(θ) AsymTT uncertainty syst. uncert.
-0.9 -0.051 None 0.003
-0.7 0.905 None 0.362
-0.5 -0.833 None 0.005
-0.3 -0.718 None 0.003
-0.1 -0.458 None 0.176
0.1 -0.311 None 0.012
0.3 -0.83 None 0.221
0.5 0.061 None 0.017
0.7 -0.544 None 0.018
0.9 -0.192 None 0.021