Measurement E151M2353

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:	0.237
Q²:	0.496 GeV²
W:	1685.0 GeV
E_beam:	2.999 GeV
ε:	0.8176

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty
0.75	234.0	-0.8985	0.8574
0.85	66.0	-0.0934	0.7553
0.85	78.0	-0.2031	0.6997
0.85	210.0	1.1855	0.9066
0.85	234.0	-0.9079	0.7168
0.85	246.0	0.2685	0.6882
0.85	258.0	0.2423	0.7128
0.85	270.0	-0.3366	0.7783
0.95	246.0	0.9413	0.7167
0.95	258.0	-0.6378	0.7334
0.95	270.0	0.6969	0.6453
0.95	282.0	0.9252	0.745
0.95	294.0	-0.2901	0.6356
0.95	306.0	0.301	0.7093

CLAS Physics Database