CLAS Physics Database

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Measurement E102M294

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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 :	1.65 — 1.67 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	-0.013	0.237	0.226	0.034
-0.7	0.387	0.366	0.479	0.077
-0.5	0.617	0.377	0.3	0.02
-0.3	-0.071	0.306	0.453	0.074
-0.1	-0.393	0.213	0.448	0.038
0.1	0.52	0.339	0.304	0.028
0.3	-0.833	0.167	0.382	0.07
0.5	0.706	0.342	0.221	0.05
0.7	-1	0	1.086	0
0.9	-0.521	0.479	0.973	0.015