Measurement E151M1891

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:	0.0261
Q²:	0.0291 GeV²
W:	1625.0 GeV
E_beam:	1.9889 GeV
ε:	0.8139

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty
0.35	78.0	-0.4772	0.8955
0.45	78.0	1.4375	0.8293
0.45	90.0	1.5902	0.8422
0.45	138.0	-0.2806	0.9323
0.45	270.0	0.0221	0.8395
0.45	282.0	-0.2285	0.8863
0.55	78.0	-1.5085	0.7695
0.55	198.0	-1.3353	0.9104
0.55	210.0	0.3192	0.7651
0.55	270.0	-0.7305	0.6533
0.55	282.0	-0.1188	0.8509
0.65	126.0	-1.4615	0.7344
0.65	138.0	-0.7587	0.7528
0.65	150.0	-0.9197	0.9589
0.65	210.0	-2.0045	0.7031
0.65	222.0	-0.1795	0.8042
0.65	282.0	0.0205	0.8267
0.75	66.0	-0.2798	0.8633
0.75	78.0	0.0453	0.8704
0.75	210.0	-0.2557	0.7194
0.75	222.0	0.1443	0.7055
0.75	270.0	1.1213	0.6086
0.75	282.0	0.6024	0.7056
0.75	294.0	0.502	0.8487
0.85	114.0	-0.641	0.7661
0.85	126.0	0.0321	0.6417
0.85	138.0	-1.0335	0.7725
0.85	198.0	-0.2628	0.7947
0.85	210.0	0.4076	0.7404
0.85	222.0	0.2865	0.7313

CLAS Physics Database