Measurement E151M1809

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:	0.2773
Q²:	0.1715 GeV²
W:	1445.0 GeV
E_beam:	1.9889 GeV
ε:	0.8733

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty
0.15	294.0	0.1083	0.8612
0.15	306.0	-0.4992	0.8151
0.25	66.0	-1.1717	0.7158
0.25	78.0	-0.2678	0.8358
0.25	294.0	0.844	0.7826
0.35	66.0	0.8398	0.749
0.35	78.0	1.3622	0.7187
0.35	282.0	1.6842	0.6503
0.35	294.0	-0.3093	0.7207
0.45	66.0	-0.3971	0.8638
0.45	78.0	-0.0672	0.6574
0.45	90.0	-1.8721	0.7583
0.45	270.0	-0.2088	0.7571
0.45	282.0	0.2273	0.7153
0.45	294.0	0.453	0.6376
0.55	78.0	-0.0628	0.8616
0.55	102.0	-0.8131	0.8629
0.55	114.0	-0.3953	0.8219
0.55	282.0	0.6967	0.8137
0.65	102.0	-0.4692	0.6524
0.65	114.0	0.2491	0.6045
0.65	126.0	-0.4247	0.6156
0.65	246.0	-0.248	0.706
0.65	258.0	-1.1778	0.7878
0.75	90.0	1.3454	0.6207
0.75	102.0	0.5897	0.5854
0.75	114.0	-0.5585	0.5857
0.75	126.0	-0.0065	0.5862
0.75	138.0	0.7307	0.8088
0.75	222.0	1.044	0.7423
0.75	234.0	0.701	0.59
0.75	246.0	0.1464	0.6549
0.75	258.0	0.6854	0.5534
0.75	270.0	0.7769	0.7713
0.85	78.0	1.4338	0.6277
0.85	90.0	-1.0118	0.7875
0.85	102.0	0.9171	0.7865
0.85	114.0	0.2557	0.6406
0.85	126.0	0.7836	0.6385
0.85	138.0	-0.594	0.729
0.85	150.0	0.318	0.8486
0.85	210.0	0.788	0.7817
0.85	222.0	-0.0139	0.6842
0.85	234.0	-0.3708	0.6426
0.85	246.0	0.327	0.597
0.85	258.0	-0.5013	0.5763
0.85	270.0	-0.5411	0.5461
0.85	282.0	-0.3647	0.8432
0.95	90.0	0.1419	0.6121
0.95	210.0	-0.3155	0.7221
0.95	222.0	0.4181	0.6344
0.95	234.0	0.3029	0.6367
0.95	246.0	0.9811	0.5908
0.95	258.0	0.0371	0.4899
0.95	270.0	0.7869	0.478
0.95	282.0	-0.3045	0.5509

CLAS Physics Database