Measurement E151M1867

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:	0.1221
Q²:	0.1205 GeV²
W:	1565.0 GeV
E_beam:	1.9889 GeV
ε:	0.821

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty
0.35	66.0	0.6042	0.9563
0.35	270.0	-1.3787	0.8917
0.45	282.0	-0.6726	0.7759
0.55	138.0	1.0754	0.8984
0.55	222.0	0.4416	0.8523
0.55	234.0	-0.728	0.9374
0.65	114.0	1.4982	0.7478
0.65	126.0	-2.1416	0.6876
0.65	138.0	2.12	0.7769
0.65	210.0	-0.1856	0.9603
0.65	222.0	1.669	0.8351
0.65	234.0	-1.6013	0.8683
0.75	114.0	-0.469	0.7145
0.75	126.0	-0.6495	0.7597
0.75	138.0	0.8921	0.8966
0.75	198.0	-1.6639	0.7897
0.75	210.0	0.614	0.6865
0.75	222.0	-0.0676	0.7902
0.75	234.0	0.4866	0.6867
0.75	246.0	-1.5267	0.7085
0.75	282.0	-1.2824	0.8549
0.85	90.0	0.6356	0.7863
0.85	102.0	-0.2061	0.9259
0.85	138.0	-1.0527	0.7813
0.85	210.0	0.3194	0.7902
0.85	222.0	0.5977	0.6581
0.85	234.0	1.3825	0.5987
0.85	246.0	-0.1183	0.6755
0.95	102.0	0.4463	0.7962
0.95	210.0	0.4636	0.8285
0.95	234.0	-0.2395	0.7618
0.95	246.0	0.5218	0.7195

CLAS Physics Database