Measurement E151M1888

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:	0.1946
Q²:	0.2915 GeV²
W:	1595.0 GeV
E_beam:	1.9889 GeV
ε:	0.7245

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.75	246.0	0.4989	1.001	0.0426
0.85	78.0	0.8723	0.9055	0.0608
0.85	90.0	-0.0937	0.9412	0.0305
0.85	246.0	1.0584	0.773	0.0708

CLAS Physics Database