CLAS Physics Database

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Measurement E151M135

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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 :	0.0348 GeV²
W :	1385 GeV
ε :	0.7343
E_beam :	1.0539 GeV
ε_L:	0.0782

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	-0.8528	0.5785	0.1016
0.25	54	0.9812	0.7383	0.1156
0.35	30	0.5827	0.9197	0.0728
0.35	42	0.8445	0.6135	0.1007
0.35	54	0.1209	0.7156	0.033
0.45	18	0.5577	0.8884	0.0702
0.45	30	-0.5066	0.613	0.065
0.45	42	1.1823	0.6713	0.1378
0.45	54	0.7611	0.6384	0.0916
0.45	258	-0.1045	0.8398	0.0323
0.55	42	0.4684	0.6849	0.0612
0.55	54	1.0794	0.8088	0.1264
0.55	150	0.4299	0.8931	0.0574
0.55	222	0.9285	0.8851	0.1098
0.55	234	-0.1043	0.6488	0.0323
0.55	246	0.5863	0.5803	0.0731
0.55	258	0.203	0.5342	0.0379
0.55	270	0.2891	0.8323	0.0445
0.65	138	0.378	0.7907	0.0524
0.65	150	0.4737	0.8228	0.0617
0.65	162	-1.4682	0.6161	0.1697
0.65	174	-0.7943	0.7813	0.0952
0.65	186	-0.0049	0.8325	0.03
0.65	222	0.6781	0.6227	0.0828
0.65	234	0.1667	0.4644	0.0355
0.65	246	0.2317	0.4749	0.0399
0.65	258	0.5457	0.5482	0.069
0.65	270	-1.059	0.5661	0.1242
0.75	138	0.2505	0.6664	0.0414
0.75	150	-0.0041	0.6732	0.03
0.75	162	-0.6332	0.5369	0.078
0.75	174	-1.0944	0.6106	0.1281
0.75	222	0.1051	0.6773	0.0323
0.75	234	0.5128	0.4753	0.0656
0.75	246	0.9507	0.4977	0.1122
0.75	258	-0.4121	0.4116	0.0557
0.75	270	-0.4758	0.5617	0.0619
0.85	150	-0.3647	0.8115	0.0512
0.85	162	1.2064	0.9019	0.1405
0.85	174	0.4693	0.7497	0.0612
0.85	210	1.4406	0.8069	0.1666
0.85	222	0.7778	0.6805	0.0934
0.85	234	0.5847	0.5074	0.073
0.85	246	-0.2649	0.4475	0.0425
0.85	258	0.6492	0.4854	0.0797
0.85	270	-0.7845	0.4807	0.0942
0.95	126	-0.4059	0.6352	0.0551
0.95	234	0.6161	0.6852	0.0762
0.95	246	-0.094	0.5287	0.0318
0.95	258	-1.1632	0.4683	0.1357