Measurement E151M2422

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:	0.0625
Q²:	0.1715 GeV²
W:	1865.0 GeV
E_beam:	2.999 GeV
ε:	0.7939

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.65	282.0	0.3705	0.9928	0.0403
0.85	90.0	-0.7268	1.0507	0.0606
0.85	102.0	-0.6153	0.9301	0.0538
0.85	114.0	-0.6354	0.9726	0.055
0.85	198.0	-0.0751	0.8807	0.0305
0.85	210.0	1.1104	1.0434	0.0859
0.85	222.0	-0.302	0.994	0.0371

CLAS Physics Database