CLAS Physics Database

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Measurement E102M267

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Experiment: E-89-039, 2007

Spokespersons: S. Dytman, K. Giovanetti

Measurement comment: Electron beam energy is 1.515 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 :	0.2 — 0.4 GeV²
W :	1.55 — 1.57 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	0.084	0.054	0.055	0.006
-0.7	0.323	0.072	0.065	0.014
-0.5	0.003	0.068	0.065	0.027
-0.3	0.043	0.064	0.061	0.041
-0.1	-0.272	0.079	0.075	0.033
0.1	-0.171	0.086	0.079	0.016
0.3	-0.26	0.084	0.077	0.001
0.5	-0.351	0.097	0.088	0.009
0.7	-0.086	0.086	0.079	0.08
0.9	0.293	0.071	0.069	0.002