Measurement E151M1885

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:	0.1394
Q²:	0.1715 GeV²
W:	1595.0 GeV
E_beam:	1.9889 GeV
ε:	0.7773

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty
0.55	114.0	-0.2483	0.9495
0.65	114.0	1.0914	0.949
0.75	114.0	1.4504	0.8583
0.75	126.0	-1.0646	0.9025
0.75	210.0	1.02	0.8015
0.75	222.0	0.2237	0.9292
0.75	246.0	1.1586	0.782
0.85	90.0	1.0984	0.7168
0.85	102.0	1.5038	0.8359
0.85	234.0	0.9613	0.748
0.85	246.0	-0.7209	0.8549
0.85	258.0	-1.1213	0.8251
0.95	222.0	2.2316	2.2316
0.95	234.0	0.0266	0.816
0.95	258.0	-0.0955	0.8253

CLAS Physics Database