Measurement E151M1903

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:	0.154
Q²:	0.2445 GeV²
W:	1625.0 GeV
E_beam:	1.9889 GeV
ε:	0.7187

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty
0.75	246.0	0.0664	0.86
0.85	210.0	-0.4566	0.9036
0.85	234.0	0.0246	0.8125
0.95	102.0	0.7979	0.7724

CLAS Physics Database