Measurement E151M1854

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:	0.1828
Q²:	0.1715 GeV²
W:	1535.0 GeV
E_beam:	1.9889 GeV
ε:	0.8214

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty
0.25	66.0	-0.5571	0.859
0.35	294.0	-0.1772	0.9023
0.45	282.0	1.1798	0.794
0.55	114.0	-1.0946	0.9142
0.55	270.0	0.1679	0.901
0.55	282.0	0.4182	0.7688
0.65	114.0	0.0586	0.6854
0.65	126.0	-0.4256	0.9044
0.65	222.0	-0.6397	0.6374
0.65	234.0	-0.0525	0.7169
0.65	246.0	-1.0941	0.7393
0.65	294.0	-1.5393	0.6755
0.75	102.0	1.7156	0.6464
0.75	114.0	0.0514	0.7211
0.75	126.0	-0.1196	0.805
0.75	138.0	0.4335	0.8123
0.75	210.0	-0.0804	0.8042
0.75	222.0	-0.0609	0.8517
0.75	234.0	0.0157	0.6669
0.75	246.0	1.2123	0.5836
0.75	258.0	-0.4752	0.6835
0.85	78.0	0.6301	0.8727
0.85	90.0	0.3271	0.7106
0.85	114.0	0.1929	0.9018
0.85	138.0	0.0088	0.803
0.85	210.0	0.4279	0.7422
0.85	222.0	-0.1938	0.6539
0.85	234.0	-0.3014	0.5741
0.85	246.0	-0.4195	0.7494
0.85	258.0	0.1982	0.5998
0.95	90.0	-0.2161	0.7369
0.95	198.0	1.5901	0.6811
0.95	222.0	-0.036	0.8208
0.95	246.0	0.052	0.6118
0.95	258.0	0.5722	0.6171
0.95	270.0	-0.2479	0.6003

CLAS Physics Database