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Measurement E102M119

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Experiment: E-89-039, 2007

Spokespersons: S. Dytman, K. Giovanetti

Measurement comment: Electron beam energy is 2.567 Gev. From fit to angular xs with constraint that fitted xs be positive over all phi.

Publication:

Quantity measured: dσ/dΩT+ε·dσ/dΩL, mcbn/srad
The differential cross section for transverse photons plus the degree of longitudinal polarization of the virtual photon times the differential cross section for longitudinal photons.
Beam: e, polarization: none
Target: p (Z=1, A=1), polarization: none
Final state: η p, polarization: none

Q2 : 0.6 — 1 GeV2
W : 1.79 — 1.81 GeV

Observable quantity measured (Y axis): dσ/dΩT+ε·dσ/dΩL, mcbn/srad
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
dσ/dΩT+ε·dσ/dΩL,
mcbn/srad
Negative uncertainty,
mcbn/srad
Positive uncertainty,
mcbn/srad
Systematic errors,
mcbn/srad
-0.9 0.034 0.017 0.017 0.009
-0.7 0.016 0.004 0.022 0.006
-0.5 0.033 0.011 0.011 0.003
-0.3 0.044 0.012 0.026 0.003
-0.1 0.066 0.019 0.02 0.016
0.1 0.077 0.017 0.017 0.009
0.3 0.066 0.014 0.018 0.014
0.5 0.122 0.018 0.018 0.007
0.7 0.12 0.019 0.019 0.011
0.9 0.063 0.016 0.017 0.012