Measurement E151M1931

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:	0.0145
Q²:	0.0245 GeV²
W:	1715.0 GeV
E_beam:	1.9889 GeV
ε:	0.7343

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.55	210.0	-1.0058	0.8479	0.0679
0.75	66.0	-0.21	0.8743	0.0326
0.85	126.0	-0.8013	0.8678	0.0571

CLAS Physics Database