Measurement E151M1920

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:	0.0277
Q²:	0.0415 GeV²
W:	1685.0 GeV
E_beam:	1.9889 GeV
ε:	0.7561

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.35	90.0	0.679	0.719	0.0509
0.35	282.0	-0.8973	0.6284	0.0621
0.45	210.0	-0.6643	0.7269	0.0502
0.45	246.0	-0.0523	0.7523	0.0302
0.45	258.0	-0.2117	0.7261	0.0326
0.45	270.0	-0.1644	0.7038	0.0316
0.45	282.0	-1.3447	0.5618	0.0868
0.55	78.0	-0.963	0.6345	0.0656
0.55	126.0	-0.4441	0.7656	0.0403
0.55	138.0	0.0691	0.6643	0.0303
0.55	222.0	-0.2501	0.6784	0.0336
0.55	258.0	-1.1458	0.6189	0.0756
0.55	270.0	0.3506	0.6955	0.0368
0.55	282.0	0.9706	0.6349	0.066
0.65	78.0	-0.6217	0.663	0.0482
0.65	114.0	-0.5511	0.7491	0.0449
0.65	126.0	-0.1459	0.6014	0.0313
0.65	138.0	-0.8655	0.6774	0.0604
0.65	198.0	-1.3627	0.6057	0.0879
0.65	210.0	0.3251	0.6327	0.0359
0.65	222.0	0.1435	0.7509	0.0312
0.65	282.0	0.7606	0.6704	0.055
0.65	294.0	-0.8103	0.6682	0.0575
0.75	66.0	-0.3105	0.5742	0.0354
0.75	186.0	-1.075	0.7504	0.0717
0.75	198.0	0.62	0.6014	0.0481
0.75	210.0	-1.3069	0.5345	0.0847
0.75	222.0	-0.8234	0.5441	0.0582
0.75	234.0	1.045	0.6342	0.0701
0.75	258.0	0.1795	0.8742	0.0319
0.75	270.0	-0.8165	0.6048	0.0579
0.75	282.0	-0.2512	0.5637	0.0336
0.85	114.0	-0.3029	0.6045	0.0352
0.85	126.0	0.1323	0.5684	0.0311
0.85	138.0	1.0936	0.7168	0.0727
0.85	198.0	0.2633	0.6622	0.034
0.85	210.0	-0.3571	0.641	0.037
0.85	222.0	-0.3457	0.5846	0.0366
0.85	234.0	-1.0675	0.5585	0.0713
0.85	270.0	0.008	0.6786	0.03

CLAS Physics Database