CLAS Physics Database

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Measurement E151M1080

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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 :	0.4155 GeV²
W :	1565 GeV
ε :	0.8818
E_beam :	2.999 GeV
ε_L:	0.3277

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	Stat. error	Syst. error
0.45	90	-0.3524	0.8621	0.0395
0.45	102	0.9944	1.045	0.0786
0.45	282	0.5099	0.8602	0.0478
0.55	90	0.2328	0.8138	0.0345
0.55	102	-0.857	0.6588	0.0695
0.55	114	-1.3358	0.6453	0.1021
0.65	90	-0.8158	0.7134	0.0667
0.65	102	-0.0052	0.7174	0.03
0.65	114	-0.2936	0.8292	0.0369
0.65	126	-0.9429	0.7664	0.0752
0.65	234	0.2984	0.9014	0.0371
0.65	306	1.4241	0.8867	0.1083
0.75	54	-0.1061	0.8606	0.031
0.75	66	-0.8737	0.6635	0.0706
0.75	90	-0.4169	0.6699	0.0428
0.75	102	0.5139	0.756	0.0481
0.75	114	0.2263	0.7367	0.0343
0.75	126	-1.8897	0.5889	0.1413
0.75	210	0.0415	0.9247	0.0302
0.75	222	-0.536	0.7666	0.0493
0.75	234	1.241	0.7761	0.0955
0.75	246	1.1399	0.7258	0.0886
0.75	258	1.168	0.8643	0.0905
0.75	270	0.0814	0.8711	0.0306
0.85	54	-0.4817	0.6758	0.0463
0.85	66	0.0228	0.6201	0.03
0.85	78	0.5824	0.8785	0.0521
0.85	114	-0.4673	0.6887	0.0455
0.85	126	-0.5692	0.7998	0.0513
0.85	174	0.5676	0.9922	0.0512
0.85	198	0.1208	0.8517	0.0313
0.85	210	-0.561	0.7114	0.0508
0.85	222	0.2097	0.8429	0.0337
0.85	234	1.3032	0.8042	0.0999
0.85	246	1.0231	0.6916	0.0806
0.85	258	0.3124	0.5646	0.0377
0.85	270	-0.4103	0.4951	0.0424
0.85	282	-0.2755	0.6197	0.0361
0.95	186	-0.796	0.6996	0.0655
0.95	222	0.1046	0.7068	0.031
0.95	234	0.1003	0.6658	0.0309
0.95	246	0.1599	0.6593	0.0322
0.95	258	-0.6433	0.5325	0.0558
0.95	270	-0.0264	0.6712	0.0301
0.95	282	-0.1457	0.5559	0.0318
0.95	294	-1.0364	0.502	0.0815
0.95	306	-0.6939	0.4678	0.0589
0.95	318	0.0496	0.5119	0.0302
0.95	330	0.3908	0.7211	0.0414