Measurement E151M2050

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:	0.4349
Q²:	0.348 GeV²
W:	1445.0 GeV
E_beam:	2.2596 GeV
ε:	0.8587

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.75	90.0	-2.0616	1.2154	0.1918
0.75	246.0	1.0801	0.7344	0.0764
0.85	282.0	-0.425	0.8144	0.0408

CLAS Physics Database