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
0.35	90.0	0.679	0.719
0.35	282.0	-0.8973	0.6284
0.45	210.0	-0.6643	0.7269
0.45	246.0	-0.0523	0.7523
0.45	258.0	-0.2117	0.7261
0.45	270.0	-0.1644	0.7038
0.45	282.0	-1.3447	0.5618
0.55	78.0	-0.963	0.6345
0.55	126.0	-0.4441	0.7656
0.55	138.0	0.0691	0.6643
0.55	222.0	-0.2501	0.6784
0.55	258.0	-1.1458	0.6189
0.55	270.0	0.3506	0.6955
0.55	282.0	0.9706	0.6349
0.65	78.0	-0.6217	0.663
0.65	114.0	-0.5511	0.7491
0.65	126.0	-0.1459	0.6014
0.65	138.0	-0.8655	0.6774
0.65	198.0	-1.3627	0.6057
0.65	210.0	0.3251	0.6327
0.65	222.0	0.1435	0.7509
0.65	282.0	0.7606	0.6704
0.65	294.0	-0.8103	0.6682
0.75	66.0	-0.3105	0.5742
0.75	186.0	-1.075	0.7504
0.75	198.0	0.62	0.6014
0.75	210.0	-1.3069	0.5345
0.75	222.0	-0.8234	0.5441
0.75	234.0	1.045	0.6342
0.75	258.0	0.1795	0.8742
0.75	270.0	-0.8165	0.6048
0.75	282.0	-0.2512	0.5637
0.85	114.0	-0.3029	0.6045
0.85	126.0	0.1323	0.5684
0.85	138.0	1.0936	0.7168
0.85	198.0	0.2633	0.6622
0.85	210.0	-0.3571	0.641
0.85	222.0	-0.3457	0.5846
0.85	234.0	-1.0675	0.5585
0.85	270.0	0.008	0.6786

CLAS Physics Database