Measurement E151M694

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:	0.1201
Q²:	0.205 GeV²
W:	1655.0 GeV
E_beam:	1.9889 GeV
ε:	0.7083

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_UL	uncertainty
0.65	294.0	-0.4068	0.645
0.85	102.0	-0.9228	0.5302
0.85	246.0	0.938	0.6717
0.85	258.0	1.383	0.7348

CLAS Physics Database