CLAS Physics Database

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Measurement E102M298

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Experiment: E-89-039, 2007

Spokespersons: S. Dytman, K. Giovanetti

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.

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 — 1.4 GeV²
W :	1.71 — 1.75 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
-0.9	0.932	1.446	0.068	0.897
-0.7	-0.678	0.322	0.59	0.002
-0.5	0.94	0.504	0.06	0.097
-0.3	-0.516	0.455	0.44	0.134
-0.1	-1	0	1.023	0.143
0.1	0.38	0.541	0.347	0.095
0.3	-0.909	0.09	0.542	0.287
0.5	-0.258	0.488	0.355	0.093
0.7	-0.899	0.101	0.663	0.413
0.9	-0.717	0.259	0.559	0.191