CLAS Physics Database

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Measurement E151M556

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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 :	0.205 GeV²
W :	1385 GeV
ε :	0.8894
E_beam :	1.9889 GeV
ε_L:	0.4157

Select data slice:
cos(θ_π⁺) =

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

Parameter (X axis): φ(π⁺), degrees

Click here to get data in text file, delimited with tabs.

Measured data:

cos(θ_π⁺)	φ(π⁺), degrees	A_UL	Data errors	Systematic errors
0.25	66	1.5789	0.7358	0.1011
0.35	66	0.5232	0.7023	0.0439
0.35	78	-1.2872	0.5453	0.0842
0.65	90	0.1045	0.6436	0.0307
0.65	102	0.8881	0.5376	0.062
0.65	114	0.4534	0.72	0.0409
0.65	258	0.1426	0.6688	0.0312
0.65	270	0.4666	0.6698	0.0414
0.75	90	-0.0845	0.5571	0.0304
0.75	102	0.0095	0.511	0.03
0.75	114	0.6608	0.5639	0.0503
0.75	126	0.181	0.603	0.032
0.75	234	0.3833	0.6408	0.0381
0.75	246	0.4037	0.5576	0.0389
0.75	258	-0.7027	0.4451	0.0524
0.75	270	0.3285	0.5375	0.0361
0.75	282	1.52	0.6712	0.0977
0.85	90	-0.272	0.5789	0.0343
0.85	102	0.7959	0.5339	0.0572
0.85	114	0.5139	0.6328	0.0434
0.85	126	0.3793	0.6151	0.0379
0.85	138	-0.1174	0.6964	0.0308
0.85	222	0.2544	0.6419	0.0338
0.85	234	0.0815	0.649	0.0304
0.85	246	-0.5363	0.4475	0.0445
0.85	258	0.288	0.5228	0.0348
0.85	270	-0.4247	0.4498	0.0397
0.85	282	0.5635	0.5883	0.0457
0.95	66	1.3913	0.6382	0.0902
0.95	102	-0.0576	0.5708	0.0302
0.95	126	0.8682	0.641	0.061
0.95	138	0.4016	0.6324	0.0388
0.95	222	-0.063	0.5545	0.0302
0.95	234	0.4172	0.6608	0.0394
0.95	246	0.03	0.4898	0.0301
0.95	258	0.2026	0.4349	0.0325
0.95	270	0.6528	0.4337	0.0499
0.95	282	-0.118	0.435	0.0309
0.95	294	1.4362	0.562	0.0928