Measurement E151M1918

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:	0.0198
Q²:	0.0291 GeV²
W:	1685.0 GeV
E_beam:	1.9889 GeV
ε:	0.7618

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.35	78.0	0.317	0.7106	0.0356
0.45	18.0	-0.6252	0.69	0.0483
0.45	78.0	-0.6499	0.6876	0.0495
0.45	270.0	-0.1732	0.6681	0.0318
0.45	282.0	0.4151	0.7193	0.0391
0.55	78.0	-0.6582	0.6975	0.0499
0.55	126.0	1.5566	0.5816	0.099
0.55	138.0	-1.0451	0.6572	0.0701
0.55	222.0	0.2507	0.7194	0.0336
0.55	270.0	-0.9138	0.6669	0.063
0.65	138.0	1.084	0.6812	0.0722
0.65	150.0	-1.4748	0.6785	0.0943
0.65	198.0	-0.4209	0.7006	0.0394
0.65	210.0	-0.081	0.6431	0.0304
0.65	222.0	-0.459	0.7002	0.0409
0.65	282.0	0.1373	0.7177	0.0311
0.75	66.0	-0.5776	0.707	0.0461
0.75	198.0	-1.1159	0.6516	0.074
0.75	210.0	-0.9607	0.5955	0.0655
0.75	222.0	-1.02	0.5793	0.0687
0.75	258.0	0.3114	0.6624	0.0354
0.75	270.0	-0.6155	0.5211	0.0479
0.75	282.0	0.1517	0.686	0.0314
0.85	114.0	-0.2277	0.7156	0.033
0.85	126.0	0.0827	0.7281	0.0304
0.85	198.0	-0.1595	0.7323	0.0315
0.85	210.0	0.3515	0.6509	0.0368
0.85	222.0	-0.9375	0.6876	0.0642

CLAS Physics Database