Measurement E151M1813

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:	0.4107
Q²:	0.348 GeV²
W:	1445.0 GeV
E_beam:	1.9889 GeV
ε:	0.8109

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.65	90.0	-0.5436	0.8315	0.0446
0.65	102.0	0.3792	0.8274	0.0378
0.75	90.0	0.7254	0.8439	0.0532
0.75	102.0	0.0275	0.8565	0.03
0.75	246.0	0.837	0.8404	0.0589
0.75	258.0	-0.2606	0.7461	0.0339
0.75	270.0	-1.0664	0.7316	0.0712
0.85	246.0	-0.096	0.7507	0.0306
0.85	270.0	-0.0355	0.855	0.0301
0.85	282.0	0.0454	0.7141	0.0301
0.85	294.0	-1.8441	0.5608	0.1157
0.95	282.0	0.9642	0.6723	0.0657
0.95	294.0	0.61	0.7222	0.0476

CLAS Physics Database