CLAS Physics Database

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Measurement E102M266

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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 :	1.53 — 1.55 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	0.13	0.046	0.046	0.043
-0.7	-0.108	0.112	0.201	0.088
-0.5	0.195	0.064	0.062	0.017
-0.3	0.214	0.048	0.047	0.036
-0.1	0.089	0.051	0.049	0.004
0.1	-0.028	0.055	0.054	0.009
0.3	-0.003	0.058	0.056	0.021
0.5	-0.068	0.058	0.056	0.011
0.7	0.235	0.051	0.049	0.018
0.9	0.256	0.073	0.072	0.024