CLAS Physics Database

Measurement E102M294

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: 1.0 — 1.4 GeV2
W: 1.65 — 1.67 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 -0.013 None 0.034
-0.7 0.387 None 0.077
-0.5 0.617 None 0.02
-0.3 -0.071 None 0.074
-0.1 -0.393 None 0.038
0.1 0.52 None 0.028
0.3 -0.833 None 0.07
0.5 0.706 None 0.05
0.7 -1.0 None 0.0
0.9 -0.521 None 0.015