Measurement E151M2423

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:	0.0722
Q²:	0.205 GeV²
W:	1865.0 GeV
E_beam:	2.999 GeV
ε:	0.7856

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.85	90.0	-0.5915	1.0033	0.0523
0.85	198.0	-1.0569	1.0783	0.0823
0.85	210.0	-1.8994	0.8687	0.141

CLAS Physics Database