CLAS Physics Database

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Measurement E102M322

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Experiment: E-89-039, 2007

Spokespersons: S. Dytman, K. Giovanetti

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.

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 //

Quantity measured: Asym_TT, dimensionless
Cross section asymmetry between phi*=0/180 and 90/270 degrees.
Beam: e, polarization: none
Target: p (Z=1, A=1), polarization: none
Final state: η p, polarization: none

Q² :	1.3 — 2.1 GeV²
W :	1.95 — 1.97 GeV

Observable quantity measured (Y axis): Asym_TT, dimensionless
Plot measurement data

Parameter (X axis): cos(θ), dimensionless

Click here to get data in text file, delimited with tabs.

Measured data:

cos(θ), dimensionless	Asym_TT, dimensionless	Negative uncertainty, dimensionless	Positive uncertainty, dimensionless	Systematic errors, dimensionless
-0.8	0.984	0.816	0.016	0.016
-0.4	-0.248	0.752	0.647	0.028
0	0.069	1.069	0.573	0.039
0.4	0.234	0.271	0.24	0.043
0.8	-0.503	0.313	0.259	0