Measurement E151M2304

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:	0.3792
Q²:	0.5925 GeV²
W:	1565.0 GeV
E_beam:	2.999 GeV
ε:	0.8489

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.55	90.0	0.7863	0.9922	0.0644
0.65	102.0	0.612	0.9277	0.0536
0.75	54.0	0.4128	0.9655	0.0424
0.75	102.0	0.0029	1.0762	0.03
0.75	270.0	-1.4216	0.8567	0.1074
0.85	102.0	0.4084	0.9988	0.0422
0.85	210.0	0.1718	1.064	0.0325
0.85	234.0	1.1623	0.8765	0.0895
0.85	270.0	-0.8706	0.8419	0.0699
0.95	294.0	-1.2284	0.7082	0.094
0.95	306.0	0.3193	0.6969	0.0379
0.95	318.0	1.1159	0.8472	0.0863

CLAS Physics Database