Measurement E151M1272

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:	0.188
Q²:	0.0348 GeV²
W:	1265.0 GeV
E_beam:	1.0539 GeV
ε:	0.8735

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty
0.15	54.0	0.4023	0.772
0.25	42.0	-0.9958	0.5448
0.25	54.0	-0.3563	0.7239
0.35	30.0	0.7412	0.5395
0.35	42.0	0.4565	0.5073
0.35	54.0	0.0261	0.5776
0.45	42.0	0.6617	0.5302
0.45	258.0	0.0289	0.7078
0.45	270.0	1.3647	0.4891
0.45	282.0	-0.1066	0.5629
0.55	246.0	-0.6231	0.4754
0.55	258.0	0.0405	0.4453
0.55	270.0	0.3064	0.4043
0.55	282.0	0.5439	0.4644
0.65	234.0	0.3152	0.5787
0.65	246.0	-0.6895	0.3619
0.65	258.0	0.3	0.3191
0.65	270.0	-0.3883	0.3505
0.65	282.0	0.682	0.5108
0.75	126.0	0.8437	0.715
0.75	138.0	0.5065	0.6225
0.75	150.0	0.3767	0.4737
0.75	162.0	-0.1456	0.4813
0.75	174.0	-0.48	0.549
0.75	186.0	-0.0382	0.5888
0.75	198.0	-0.1947	0.6315
0.75	210.0	0.823	0.6756
0.75	234.0	0.079	0.4746
0.75	246.0	-0.2571	0.322
0.75	258.0	0.2345	0.3487
0.75	270.0	0.2961	0.3312
0.75	282.0	-0.1352	0.4089
0.85	126.0	0.1329	0.5613
0.85	138.0	-0.519	0.4824
0.85	150.0	0.6201	0.3986
0.85	162.0	-0.351	0.4059
0.85	174.0	-0.3384	0.4652
0.85	186.0	0.4209	0.4817
0.85	198.0	-0.4493	0.4998
0.85	210.0	0.0417	0.5779
0.85	222.0	0.1663	0.6142
0.85	234.0	0.4402	0.4139
0.85	246.0	0.3452	0.3791
0.85	258.0	0.3402	0.3618
0.85	270.0	-0.0934	0.3874
0.85	282.0	-0.456	0.6212
0.95	162.0	0.5346	0.5158
0.95	174.0	-0.1925	0.5303
0.95	186.0	1.4851	1.4851

CLAS Physics Database