Measurement E151M1915

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:	0.1061
Q²:	0.1715 GeV²
W:	1655.0 GeV
E_beam:	1.9889 GeV
ε:	0.7242

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.65	282.0	0.1754	0.8311	0.0318
0.65	294.0	0.0152	0.8268	0.03
0.75	138.0	-0.9567	0.8499	0.0653
0.75	222.0	-2.5258	2.5258	0.156
0.75	246.0	-0.1398	0.7535	0.0312
0.85	102.0	0.0044	0.7512	0.03
0.85	114.0	0.6964	0.7957	0.0518
0.85	210.0	-0.8132	0.8281	0.0577
0.85	222.0	1.0283	0.6824	0.0692
0.85	234.0	-0.7456	0.7279	0.0542
0.85	246.0	0.0046	0.8012	0.03

CLAS Physics Database