Measurement E151M1718

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:	0.784
Q²:	0.205 GeV²
W:	1265.0 GeV
E_beam:	1.9889 GeV
ε:	0.9289

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty
0.25	66.0	0.0164	0.5303
0.35	66.0	0.6876	0.5501
0.35	78.0	-0.9701	0.5329
0.45	66.0	0.1648	0.6171
0.45	78.0	0.0243	0.6648
0.45	282.0	0.3471	0.57
0.55	66.0	-0.3191	0.6923
0.55	270.0	0.8595	0.4877
0.55	282.0	0.848	0.4973
0.65	258.0	0.9907	0.5279
0.65	270.0	-0.2195	0.5034
0.65	282.0	0.715	0.3914
0.65	294.0	0.3675	0.5225
0.75	78.0	1.5989	0.4388
0.75	90.0	0.7338	0.5058
0.75	102.0	0.2408	0.6629
0.75	114.0	1.5287	0.5328
0.75	258.0	0.5085	0.483
0.75	270.0	-0.9169	0.4497
0.75	282.0	-0.1416	0.5184
0.85	78.0	0.6634	0.475
0.85	90.0	0.128	0.5473
0.85	102.0	-0.572	0.5116
0.85	114.0	0.7062	0.5122
0.85	126.0	0.7714	0.5204
0.85	234.0	0.178	0.6553
0.85	246.0	-1.1074	0.3951
0.85	258.0	0.9843	0.4992
0.85	270.0	-0.1928	0.472
0.85	282.0	0.5247	0.4145
0.85	294.0	0.6108	0.419
0.95	78.0	0.3997	0.5312
0.95	90.0	1.3572	0.3351
0.95	102.0	0.3301	0.5289
0.95	114.0	0.3108	0.458
0.95	126.0	0.161	0.564
0.95	138.0	1.6519	1.6519
0.95	150.0	0.5127	0.4723
0.95	246.0	-0.0975	0.5789
0.95	270.0	-0.6393	0.4853

CLAS Physics Database