Measurement E151M649

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:	0.2016
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_UL	uncertainty	syst. uncert.
0.65	102.0	0.6327	0.8967	0.049
0.75	234.0	0.1853	0.8135	0.0321
0.85	78.0	0.5753	0.8594	0.0462
0.85	246.0	0.3452	0.6954	0.0367
0.85	258.0	-0.3915	0.6997	0.0384
0.95	222.0	1.5027	0.7336	0.0967
0.95	234.0	1.3434	0.7753	0.0875

CLAS Physics Database