Measurement E151M1814

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:	0.053
Q²:	0.0291 GeV²
W:	1475.0 GeV
E_beam:	1.9889 GeV
ε:	0.9061

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty
0.35	78.0	-0.8838	0.792
0.35	282.0	-1.4841	0.69
0.45	66.0	0.0744	0.8198
0.45	78.0	0.7498	0.6169
0.45	90.0	1.0183	0.6679
0.45	270.0	1.4203	0.6365
0.45	282.0	0.0721	0.6338
0.45	294.0	-1.165	0.7308
0.55	78.0	0.3199	0.6518
0.55	90.0	-0.3654	0.8992
0.55	126.0	-1.0085	0.8417
0.55	138.0	0.8856	0.7506
0.55	222.0	0.4578	0.6737
0.55	234.0	-0.3159	0.6288
0.55	270.0	0.345	0.7962
0.55	282.0	-0.8678	0.6288
0.55	294.0	-1.0935	0.6532
0.65	114.0	-1.4748	0.7128
0.65	126.0	-0.2086	0.6838
0.65	150.0	0.5885	0.7912
0.65	210.0	0.6441	0.7794
0.65	222.0	0.8663	0.7205
0.65	234.0	-0.7172	0.5501
0.65	246.0	-0.3723	0.7331
0.75	78.0	1.2192	0.8166
0.75	114.0	-1.4093	0.64
0.75	126.0	0.3645	0.6879
0.75	138.0	-0.083	0.779
0.75	150.0	-0.5366	0.8053
0.75	198.0	1.0148	0.7708
0.75	222.0	-0.4483	0.5818
0.75	234.0	0.0086	0.6195
0.75	246.0	1.8929	0.6043
0.75	282.0	0.8172	0.7784
0.85	210.0	-1.6318	0.7069
0.85	222.0	0.7852	0.688
0.85	234.0	-0.5	0.6107
0.85	246.0	0.504	0.7072

CLAS Physics Database