Measurement E151M2008

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:	0.598
Q²:	0.2915 GeV²
W:	1355.0 GeV
E_beam:	2.2596 GeV
ε:	0.906

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty
0.75	90.0	0.5899	1.5446
0.75	246.0	-0.0134	1.3725
0.85	90.0	1.7845	1.6584
0.85	102.0	4.1204	1.527
0.95	306.0	10.2381	10.2381
0.65	270.0	-1.6348	0.5768
0.75	78.0	0.4947	0.6735
0.75	102.0	1.161	0.6463
0.85	90.0	-0.3004	0.7144
0.85	102.0	0.009	0.7157
0.85	114.0	-0.2065	0.7012
0.85	246.0	0.1417	0.7831
0.85	270.0	-0.2882	0.7347
0.85	282.0	0.5664	0.6877
0.85	294.0	0.5914	0.6155
0.95	270.0	2.6565	0.8962
0.95	294.0	0.9237	1.049

CLAS Physics Database