Measurement E151M2101

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:	0.1699
Q²:	0.1715 GeV²
W:	1565.0 GeV
E_beam:	2.2596 GeV
ε:	0.8519

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.65	114.0	0.1786	0.979	0.0342
0.75	114.0	0.8306	1.0078	0.082
0.85	78.0	0.5809	1.1375	0.0612
0.85	222.0	-0.2643	1.0324	0.0386
0.85	246.0	0.1471	0.9209	0.0329
0.95	258.0	1.7447	2.494	0.1631
0.55	114.0	-0.2557	0.8919	0.0343
0.65	126.0	1.529	0.8465	0.1039
0.75	114.0	0.3167	0.874	0.0364
0.75	126.0	-0.8391	0.8918	0.0623
0.85	78.0	0.219	0.9095	0.0332
0.85	222.0	-0.4094	1.05	0.0401
0.85	234.0	-0.0747	0.8998	0.0304
0.85	246.0	-0.0366	0.9866	0.0301
0.85	258.0	-1.2733	0.9255	0.0881
0.95	210.0	-2.3546	1.6021	0.1561
0.95	258.0	1.6788	1.4346	0.1133

CLAS Physics Database