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Measurement E151M21

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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 : 0.0084 GeV2
W : 1235 GeV
ε : 0.9196
Ebeam : 1.0539 GeV
εL: 0.0642 

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
0.55 258 -0.7658 0.3551 0.0921
0.55 270 -0.3007 0.435 0.0455
0.65 234 -0.1744 0.5039 0.036
0.65 246 -0.425 0.3646 0.0569
0.65 258 0.4059 0.4426 0.0551
0.65 270 0.0205 0.4254 0.0301
0.75 174 0.2691 0.5499 0.0429
0.75 246 0.6338 0.4001 0.0781
0.75 258 0.3586 0.4385 0.0506