CLAS Physics Database

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Measurement E151M59

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Experiment: EG4, 2016

Spokespersons: Xiaochao Zheng

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).

No publications available for this experiment

Quantity measured: A_UL,
Target spin asymmetry.
Beam: e, polarization: longitudinal
Target: p (Z=1, A=1), polarization: longitudinal
Final state: π⁺n, polarization: none

Q² :	0.1715 GeV²
W :	1265 GeV
ε :	0.7407
E_beam :	1.0539 GeV
ε_L:	0.5631

Select data slice:
cos(θ_π⁺) =

Observable quantity measured (Y axis): A_UL,
Plot measurement data

Parameter (X axis): φ(π⁺), degrees

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Measured data:

cos(θ_π⁺)	φ(π⁺), degrees	A_UL	Data errors	Systematic errors
0.05	42	-0.3774	0.6686	0.0524
0.35	282	-0.1808	0.6053	0.0364
0.45	270	0.9641	0.5622	0.1137
0.45	282	-0.2386	0.5888	0.0405
0.55	270	0.5755	0.5172	0.072
0.55	282	-0.438	0.4976	0.0582
0.55	294	0.0102	0.6088	0.03
0.65	246	-0.0574	0.5161	0.0307
0.65	258	0.1431	0.4898	0.0341
0.65	270	0.0243	0.4212	0.0301
0.65	282	0.855	0.5658	0.1018
0.65	294	-0.2667	0.482	0.0427
0.75	126	0.1701	0.6217	0.0357
0.75	138	0.5293	0.6517	0.0673
0.75	150	0.709	0.7273	0.0861
0.75	246	0.3857	0.6024	0.0532
0.75	258	0	0.4718	0.03
0.75	270	-0.6457	0.4579	0.0794
0.75	282	-0.7512	0.389	0.0906
0.75	294	-0.558	0.4595	0.0702
0.85	114	0.0794	0.5381	0.0313
0.85	126	0.8026	0.5349	0.0961
0.85	138	0.3172	0.5038	0.0469
0.85	150	-0.7366	0.4799	0.089
0.85	162	0.6236	0.5413	0.077
0.85	174	-0.2058	0.5774	0.0381
0.85	186	-0.4837	0.5081	0.0627
0.85	198	0.1086	0.5702	0.0324
0.85	258	1.0328	0.5804	0.1213
0.85	270	-0.3458	0.4114	0.0495
0.85	282	0.1066	0.4411	0.0324
0.85	294	-0.431	0.5063	0.0575
0.95	66	0.4123	0.5575	0.0557
0.95	114	0.784	0.551	0.0941
0.95	126	-0.3538	0.4003	0.0502
0.95	138	0.6131	0.4663	0.0759
0.95	150	-0.4686	0.3956	0.0612
0.95	162	-0.038	0.4842	0.0303
0.95	174	0.8863	0.4153	0.1052
0.95	186	0.0522	0.471	0.0306
0.95	198	-0.1039	0.46	0.0322