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Measurement E102M111

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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 : 1.63 — 1.65 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 0.203 0.018 0.018 0.008
-0.7 0.135 0.025 0.025 0.01
-0.5 0.195 0.043 0.043 0.019
-0.3 0.172 0.019 0.023 0.011
-0.1 0.152 0.022 0.022 0.01
0.1 0.147 0.021 0.021 0.012
0.3 0.095 0.015 0.015 0.009
0.5 0.096 0.019 0.022 0.012
0.7 0.07 0.016 0.016 0.007
0.9 0.019 0.017 0.022 0.006