Measurement E151M1958

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:	0.868
Q²:	0.1715 GeV²
W:	1235.0 GeV
E_beam:	2.2596 GeV
ε:	0.9577

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.55	78.0	-0.6257	0.4768	0.0506
0.55	270.0	-0.1404	0.5266	0.0314
0.55	282.0	-0.131	0.4181	0.0346
0.65	282.0	-2.4203	2.1495	0.2244
0.75	90.0	-2.5818	2.8745	0.2392
0.75	270.0	-2.6772	2.3428	0.2479
0.75	282.0	1.228	2.425	0.1168
0.85	90.0	2.9069	3.2954	0.2688
0.85	102.0	6.0291	2.4775	0.5549
0.95	114.0	1.0971	9.3167	0.1052
0.95	126.0	-6.2854	8.8062	0.5784
0.95	138.0	-0.0816	9.8022	0.0309
0.55	294.0	-0.192	0.49	0.0325
0.65	270.0	-1.1986	0.3894	0.0835
0.65	282.0	-0.5522	0.4342	0.0468
0.75	270.0	-0.2068	0.5197	0.0329
0.75	282.0	0.2331	0.4822	0.0336
0.85	90.0	-0.0491	0.4856	0.0302
0.85	102.0	0.9294	0.5065	0.0675
0.85	114.0	-0.8726	0.5287	0.0642
0.85	270.0	0.3075	0.5613	0.0361
0.85	282.0	0.6263	0.5695	0.0506
0.95	90.0	-0.3068	0.869	0.036
0.95	102.0	0.3366	0.8285	0.0371
0.95	114.0	0.1963	0.8088	0.0326
0.95	126.0	-1.193	0.8236	0.0832

CLAS Physics Database