CLAS Physics Database

Measurement E102M339

Experiment: E-89-039
Year: 2007

Measurement comment:

Electron beam energy is 4.056 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: 2.1 — 2.9 GeV2
W: 1.75 — 1.79 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.
-0.8 0.355 None 0.004
-0.4 0.584 None 0.026
0.0 0.419 None 0.023
0.4 -0.707 None 0.014
0.8 -0.723 None 0.031