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
0.45	270.0	-0.565	0.8397
0.55	126.0	-0.389	0.9362
0.55	270.0	-0.154	0.9594
0.65	114.0	-2.1053	0.7278
0.65	222.0	-2.3825	2.3825
0.65	294.0	0.1268	0.8102
0.75	126.0	0.8732	0.8987
0.75	210.0	0.054	0.8661
0.75	222.0	1.5146	0.7517
0.75	234.0	-0.2521	0.7629
0.85	90.0	0.7825	0.8238
0.85	114.0	-0.0415	0.8836
0.85	210.0	-1.6608	0.7258
0.85	222.0	0.7809	0.9041
0.85	234.0	0.3618	0.8916
0.85	258.0	1.2646	0.8389

CLAS Physics Database