Measurement E151M1871

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_LL
ε_L:	0.2016
Q²:	0.2445 GeV²
W:	1565.0 GeV
E_beam:	1.9889 GeV
ε:	0.77

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.65	102.0	-0.547	0.992	0.0447
0.75	234.0	-0.2168	0.9296	0.0327
0.85	78.0	-0.3037	0.9439	0.0352
0.85	246.0	0.1978	0.7972	0.0323
0.85	258.0	-0.695	0.8518	0.0517
0.95	222.0	0.0161	0.7954	0.03
0.95	234.0	0.6116	0.8224	0.0477

CLAS Physics Database