Measurement E151M500

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:	0.9893
Q²:	0.4155 GeV²
W:	1265.0 GeV
E_beam:	1.9889 GeV
ε:	0.8714

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_UL	uncertainty	syst. uncert.
0.65	258.0	0.9124	0.6005	0.0634
0.75	90.0	-0.0186	0.5951	0.03
0.85	270.0	-0.4452	0.4495	0.0405

CLAS Physics Database