Measurement E151M1343

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:	0.249
Q²:	0.1205 GeV²
W:	1355.0 GeV
E_beam:	1.0539 GeV
ε:	0.6795

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty	syst. uncert.
0.35	42.0	1.069	0.9462	0.1242
0.45	258.0	-0.6374	0.9223	0.0779
0.55	246.0	0.6111	0.9237	0.0752
0.55	258.0	-1.7788	0.6588	0.2029
0.55	270.0	0.1358	0.7348	0.0337
0.65	234.0	0.3798	0.9167	0.0523
0.65	246.0	0.3351	0.7446	0.0483
0.65	258.0	1.0907	0.6167	0.1266
0.65	270.0	0.6679	0.6051	0.0811
0.75	138.0	-0.0934	0.805	0.0318
0.75	174.0	1.8349	0.7305	0.2091
0.75	234.0	1.1122	0.8601	0.129
0.75	246.0	0.1402	0.6094	0.0339
0.75	258.0	0.6469	0.6356	0.0789
0.75	270.0	-0.4439	0.6238	0.0584
0.75	282.0	-0.0142	0.6886	0.03
0.85	126.0	1.2859	0.7752	0.1481
0.85	138.0	1.2564	0.8038	0.1448
0.85	150.0	0.948	0.904	0.111
0.85	162.0	1.4266	0.7712	0.1637
0.85	174.0	-0.3637	0.8373	0.0508
0.85	246.0	0.7965	0.7327	0.0947
0.85	258.0	-0.0507	0.6897	0.0305
0.85	270.0	0.2964	0.5799	0.0449
0.85	282.0	1.1132	0.6216	0.1291
0.85	294.0	0.3992	0.8259	0.0541
0.95	246.0	-0.5467	0.6853	0.0686

CLAS Physics Database