Measurement E151M1909

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:	0.044
Q²:	0.0593 GeV²
W:	1655.0 GeV
E_beam:	1.9889 GeV
ε:	0.7757

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.35	18.0	-1.1711	0.723	0.077
0.35	270.0	-0.4733	0.6295	0.0415
0.35	282.0	-0.0885	0.761	0.0305
0.45	78.0	-0.6822	0.6864	0.0511
0.45	270.0	-0.6777	0.6974	0.0509
0.45	282.0	-1.8771	0.6084	0.1176
0.45	294.0	0.8827	0.7769	0.0613
0.55	78.0	-1.0076	0.7145	0.068
0.55	126.0	-2.1683	0.6126	0.1348
0.55	138.0	-0.6901	0.8265	0.0515
0.55	210.0	-0.5507	0.8282	0.0449
0.55	222.0	0.1793	0.8107	0.0319
0.55	258.0	-0.9367	0.7976	0.0642
0.55	270.0	-0.1799	0.5959	0.0319
0.55	282.0	-0.7003	0.7265	0.052
0.65	114.0	-1.2392	0.7871	0.0809
0.65	126.0	-0.3967	0.7408	0.0384
0.65	198.0	-0.4574	0.7605	0.0408
0.65	210.0	-0.4257	0.7044	0.0396
0.65	222.0	-0.6485	0.6948	0.0494
0.65	258.0	1.0749	0.7811	0.0717
0.65	282.0	-0.873	0.6991	0.0608
0.65	294.0	0.7635	0.6996	0.0551
0.75	66.0	-0.1583	0.671	0.0315
0.75	126.0	0.8854	0.8364	0.0615
0.75	198.0	-1.6734	0.7889	0.1057
0.75	210.0	-0.5678	0.7311	0.0456
0.75	222.0	-0.1265	0.6483	0.031
0.75	234.0	-1.1306	0.7183	0.0748
0.75	246.0	0.1451	0.8439	0.0313
0.75	270.0	-0.5298	0.5648	0.0439
0.75	282.0	0.261	0.6045	0.0339
0.75	294.0	0.2223	0.7045	0.0329
0.85	114.0	-0.7094	0.7489	0.0524
0.85	126.0	0.2555	0.732	0.0338
0.85	186.0	-0.6039	0.7892	0.0473
0.85	198.0	-1.4532	0.7361	0.093
0.85	210.0	-1.4419	0.4993	0.0924
0.85	222.0	-0.2586	0.6243	0.0338
0.85	234.0	0.2152	0.7515	0.0327

CLAS Physics Database