CLAS Physics Database

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Measurement E151M72

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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 :	0.0415 GeV²
W :	1295 GeV
ε :	0.8393
E_beam :	1.0539 GeV
ε_L:	0.1748

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
0.25	42	1.4257	0.6939	0.165
0.25	54	0.1553	0.7658	0.0348
0.35	30	0.1554	0.6572	0.0348
0.35	42	-0.1387	0.6263	0.0339
0.45	30	0.5954	0.8002	0.0741
0.45	42	-0.1329	0.5996	0.0336
0.45	270	-0.0762	0.5682	0.0312
0.55	246	-0.2548	0.4194	0.0417
0.55	258	-0.037	0.4165	0.0303
0.55	270	-0.4647	0.3929	0.0608
0.55	282	0.6756	0.7277	0.0825
0.65	138	-0.1054	0.6773	0.0323
0.65	150	0.8474	0.788	0.101
0.65	222	-0.4502	0.6179	0.0594
0.65	234	0.3032	0.4875	0.0457
0.65	246	-0.4034	0.3867	0.0548
0.65	258	0.1441	0.3659	0.0342
0.65	270	-0.0284	0.3723	0.0302
0.65	282	0.6322	0.5311	0.0779
0.75	126	0.5628	0.7576	0.0707
0.75	138	0.7048	0.5876	0.0856
0.75	150	0.9698	0.5468	0.1143
0.75	162	-0.17	0.4431	0.0357
0.75	174	0.5432	0.5356	0.0687
0.75	186	-0.5659	0.5102	0.071
0.75	198	-0.653	0.6231	0.0801
0.75	210	-0.2288	0.6345	0.0397
0.75	222	-0.2848	0.5495	0.0442
0.75	234	-0.1318	0.4726	0.0335
0.75	246	-0.2886	0.3525	0.0445
0.75	258	-0.0202	0.3267	0.0301
0.75	270	0.1339	0.3858	0.0336
0.75	282	-0.4954	0.4144	0.0638
0.85	126	-0.262	0.6487	0.0423
0.85	138	-0.5568	0.4855	0.0701
0.85	150	0.3858	0.4526	0.0532
0.85	162	-0.7002	0.4691	0.0851
0.85	174	-0.0171	0.4564	0.0301
0.85	186	0.5982	0.5753	0.0744
0.85	198	-0.4367	0.5503	0.058
0.85	222	0.0546	0.5729	0.0306
0.85	234	0.8231	0.4548	0.0983
0.85	246	-0.3866	0.3358	0.0532
0.85	258	0.6751	0.3553	0.0825
0.85	270	-0.2015	0.3397	0.0378
0.85	282	0.4154	0.5301	0.056
0.95	114	-0.742	0.4719	0.0896
0.95	138	-0.2007	0.5068	0.0377
0.95	150	0.0008	0.5195	0.03
0.95	162	-0.5592	0.5136	0.0703
0.95	186	-0.4266	0.4656	0.0571
0.95	246	0.3917	0.4801	0.0537