Measurement E151M664

Experiment:	EG4
Year:	2016	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).
Spokesperson:	Xiaochao Zheng
Reaction:	ep → π⁺n
Polarization:	beam (longitudinal), target (longitudinal)
Quantity:	A_UL
ε_L:	0.1577
Q²:	0.205 GeV²
W:	1595.0 GeV
E_beam:	1.9889 GeV
ε:	0.7628

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_UL	uncertainty	syst. uncert.
0.65	114.0	0.3804	0.8591	0.038
0.65	222.0	0.3669	0.8268	0.0375
0.75	114.0	-0.0813	0.7223	0.0304
0.75	138.0	-0.6674	0.7453	0.0507
0.75	210.0	-0.0403	0.7927	0.0301
0.75	222.0	1.2148	0.8431	0.0801
0.75	234.0	1.0548	0.8675	0.0711
0.75	246.0	1.3455	0.8077	0.0876
0.85	78.0	-0.15	0.8342	0.0314
0.85	222.0	-0.3029	0.6857	0.0353
0.85	234.0	-0.4189	0.6398	0.0395
0.85	246.0	1.0869	0.8306	0.0729
0.85	258.0	0.1477	0.7922	0.0313
0.95	246.0	0.2218	0.6712	0.0329
0.95	258.0	-0.048	0.642	0.0301
0.95	270.0	0.3537	0.6596	0.037

CLAS Physics Database