Measurement E151M1890

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:	0.0221
Q²:	0.0245 GeV²
W:	1625.0 GeV
E_beam:	1.9889 GeV
ε:	0.8159

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.65	222.0	-0.5666	0.9038	0.0456
0.75	198.0	0.0678	0.9294	0.0303
0.75	210.0	-1.5141	0.7868	0.0965
0.85	126.0	-0.2769	0.9109	0.0344
0.85	138.0	-0.9699	0.8614	0.066
0.85	222.0	-0.357	0.7598	0.037

CLAS Physics Database