Measurement E151M1919

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:	0.0234
Q²:	0.0348 GeV²
W:	1685.0 GeV
E_beam:	1.9889 GeV
ε:	0.7592

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.45	78.0	-1.2988	0.5971	0.0842
0.45	270.0	0.1298	0.7073	0.031
0.45	282.0	-0.3399	0.6049	0.0364
0.55	102.0	-0.5313	0.7337	0.044
0.55	258.0	-0.0887	0.7297	0.0305
0.55	270.0	-1.5563	0.6442	0.099
0.55	318.0	-0.708	0.6769	0.0524
0.65	126.0	-0.8022	0.5942	0.0571
0.65	198.0	-1.561	0.5778	0.0992
0.65	210.0	-0.1899	0.6782	0.0321
0.65	282.0	-0.0909	0.6249	0.0305
0.65	294.0	0.7857	0.6907	0.0563
0.75	66.0	0.3945	0.5766	0.0384
0.75	78.0	0.7896	0.7078	0.0565
0.75	198.0	0.5851	0.5873	0.0464
0.75	222.0	0.6504	0.5922	0.0495
0.75	258.0	-0.5	0.6654	0.0426
0.75	270.0	0.564	0.4722	0.0455
0.75	282.0	0.3964	0.4867	0.0384
0.85	114.0	1.0128	0.5929	0.0683
0.85	126.0	0.8607	0.6351	0.0602
0.85	138.0	-1.2729	0.5998	0.0828
0.85	198.0	-0.4504	0.5975	0.0406
0.85	210.0	-1.1494	0.5688	0.0758
0.85	222.0	-0.8997	0.5624	0.0622
0.85	270.0	-0.708	0.6416	0.0524

CLAS Physics Database