Measurement E151M2137

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:	0.1016
Q²:	0.1435 GeV²
W:	1655.0 GeV
E_beam:	2.2596 GeV
ε:	0.8058

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.85	90.0	-1.6687	1.348	0.1563
0.85	222.0	-1.2492	0.881	0.0866
0.85	234.0	-0.0097	0.7421	0.0315

CLAS Physics Database