Measurement E151M1723

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:	0.1708
Q²:	0.0348 GeV²
W:	1295.0 GeV
E_beam:	1.9889 GeV
ε:	0.9637

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.35	306.0	0.0879	0.7179	0.0305
0.45	66.0	-0.1408	0.7307	0.0312
0.45	78.0	-1.038	0.647	0.0697
0.55	78.0	-0.8629	0.5902	0.0603
0.55	90.0	-0.705	0.583	0.0522
0.65	78.0	-0.5387	0.6827	0.0443
0.65	90.0	0.266	0.6225	0.0341
0.65	246.0	-0.7903	0.5608	0.0565
0.65	258.0	0.1361	0.4792	0.0311
0.65	270.0	0.4288	0.604	0.0397
0.75	114.0	0.0558	0.6932	0.0302
0.75	126.0	-0.6757	0.6339	0.0508
0.75	138.0	-0.5444	0.6555	0.0446
0.75	150.0	-0.1622	0.6967	0.0316
0.75	234.0	1.5127	0.4681	0.0964
0.75	246.0	-0.1151	0.4784	0.0308
0.75	258.0	-0.379	0.4135	0.0378
0.75	270.0	0.9075	0.522	0.0626
0.85	126.0	-0.2931	0.6561	0.0349
0.85	138.0	0.01	0.7467	0.03
0.85	150.0	0.6109	0.6366	0.0476
0.85	222.0	-0.2058	0.6445	0.0325
0.85	234.0	-0.0892	0.5602	0.0305
0.85	246.0	0.6527	0.4932	0.0496
0.85	258.0	-0.1135	0.4904	0.0308

CLAS Physics Database