Measurement E151M1900

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:	0.1066
Q²:	0.1435 GeV²
W:	1625.0 GeV
E_beam:	1.9889 GeV
ε:	0.7644

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.45	270.0	-0.565	0.8397	0.0455
0.55	126.0	-0.389	0.9362	0.0382
0.55	270.0	-0.154	0.9594	0.0314
0.65	114.0	-2.1053	0.7278	0.1311
0.65	222.0	-2.3825	2.3825	0.1475
0.65	294.0	0.1268	0.8102	0.031
0.75	126.0	0.8732	0.8987	0.0608
0.75	210.0	0.054	0.8661	0.0302
0.75	222.0	1.5146	0.7517	0.0966
0.75	234.0	-0.2521	0.7629	0.0337
0.85	90.0	0.7825	0.8238	0.0561
0.85	114.0	-0.0415	0.8836	0.0301
0.85	210.0	-1.6608	0.7258	0.105
0.85	222.0	0.7809	0.9041	0.056
0.85	234.0	0.3618	0.8916	0.0372
0.85	258.0	1.2646	0.8389	0.0823

CLAS Physics Database