Measurement E151M1783

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:	0.0721
Q²:	0.0291 GeV²
W:	1415.0 GeV
E_beam:	1.9889 GeV
ε:	0.9309

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.45	78.0	0.0513	0.895	0.0302
0.65	78.0	-0.56	0.8422	0.0453
0.65	222.0	-0.4239	0.8597	0.0395
0.65	234.0	0.9225	0.7057	0.0634
0.65	246.0	-0.7355	0.7444	0.0537
0.75	114.0	0.9923	0.8477	0.0672
0.75	126.0	-0.5951	0.7393	0.0469
0.75	234.0	-0.1274	0.8463	0.031
0.85	138.0	1.8594	0.6773	0.1166
0.85	234.0	0.8143	0.6814	0.0577
0.85	246.0	0.0628	0.7062	0.0302

CLAS Physics Database