Measurement E151M2125

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:	0.1321
Q²:	0.1715 GeV²
W:	1625.0 GeV
E_beam:	2.2596 GeV
ε:	0.8164

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.75	126.0	0.9785	0.9097	0.0948
0.85	246.0	-0.0622	0.9317	0.0305
0.75	222.0	-0.5048	0.9753	0.0445
0.85	90.0	1.2737	0.8653	0.0881
0.85	234.0	-1.3274	0.9736	0.0914
0.85	246.0	-1.7564	0.9308	0.1181

CLAS Physics Database