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Measurement E151M104

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Experiment: EG4, 2016

Spokespersons: Xiaochao Zheng

Experiment comment: Final asymmetry results for the ep-> e pi+ (n) channel extracted from CLAS/EG4 data obtained using a longitudinally polarized beam and a longitudinally polarized NH3 target (CAA HS07-02).

No publications available for this experiment

Quantity measured: AUL,
Target spin asymmetry.
Beam: e, polarization: longitudinal
Target: p (Z=1, A=1), polarization: longitudinal
Final state: π+n, polarization: none

Q2 : 0.0059 GeV2
W : 1355 GeV
ε : 0.8092
Ebeam : 1.0539 GeV
εL: 0.0183 

Select data slice:
cos(θπ+) =
Observable quantity measured (Y axis): AUL,
Plot measurement data

Parameter (X axis): φ(π+), degrees

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Measured data:

cos(θπ+) φ(π+),
degrees 		AUL Data errors Systematic errors
0.45 54 2.1475 1.0372 0.2462
0.55 54 0.3854 0.8137 0.0531
0.55 234 0.2874 0.8462 0.0444
0.55 246 -0.0211 0.6821 0.0301
0.65 54 1.0098 0.8149 0.1187
0.65 222 -0.0882 0.7284 0.0316
0.65 234 -0.2407 0.6177 0.0406
0.65 246 1.1587 0.693 0.1352
0.65 258 -0.8693 0.6825 0.1033
0.75 222 0.9819 0.815 0.1157
0.75 234 -1.2651 0.6368 0.147
0.75 246 -0.3041 0.5357 0.0458
0.85 234 0.1846 0.6361 0.0366
0.85 246 -0.1953 0.5888 0.0373