CLAS Physics Database

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Measurement E151M96

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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 :	0.0593 GeV²
W :	1325 GeV
ε :	0.788
E_beam :	1.0539 GeV
ε_L:	0.1883

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
0.35	30	-0.0309	0.7778	0.0302
0.35	42	-0.1863	0.7142	0.0367
0.55	234	0.4994	0.7947	0.0643
0.55	246	-0.203	0.5096	0.0379
0.55	258	0.314	0.4883	0.0466
0.55	270	0.3704	0.4824	0.0517
0.55	282	-0.7197	0.6622	0.0872
0.65	138	0.362	0.8226	0.051
0.65	150	-0.3756	0.757	0.0522
0.65	222	0.6647	0.8223	0.0814
0.65	234	0.0932	0.4752	0.0318
0.65	246	0.4493	0.5022	0.0593
0.65	258	0.9202	0.4609	0.1089
0.65	270	0.5788	0.4483	0.0724
0.75	126	-0.4493	0.6647	0.0593
0.75	138	-0.524	0.524	0.0667
0.75	150	0.646	0.6005	0.0794
0.75	162	0.1807	0.7103	0.0364
0.75	174	-0.4429	0.5862	0.0586
0.75	186	-0.234	0.6319	0.0401
0.75	222	-0.3303	0.6977	0.0481
0.75	234	0.1135	0.4865	0.0327
0.75	246	-0.5067	0.3941	0.065
0.75	258	-0.3313	0.4057	0.0482
0.75	270	-0.0975	0.4263	0.032
0.75	282	-0.2314	0.513	0.0399
0.85	126	0.8521	0.5774	0.1015
0.85	138	0.0441	0.5056	0.0304
0.85	150	0.7217	0.5249	0.0874
0.85	162	-0.3334	0.4697	0.0484
0.85	174	0.4994	0.5367	0.0643
0.85	186	-0.295	0.6293	0.045
0.85	198	0.2377	0.6819	0.0404
0.85	222	0.3773	0.6994	0.0524
0.85	234	-0.0148	0.5022	0.03
0.85	246	0.2076	0.4148	0.0382
0.85	258	0.2316	0.3743	0.0399
0.85	270	-0.4127	0.3198	0.0557
0.85	282	0.094	0.4721	0.0318
0.95	126	0.6617	0.6245	0.081
0.95	138	0.861	0.5922	0.1025
0.95	150	0.6312	0.5842	0.0778
0.95	162	-1.4349	0.3868	0.166
0.95	174	0.1875	0.6423	0.0368
0.95	186	-0.5732	0.5575	0.0718
0.95	246	-0.2127	0.4687	0.0385
0.95	258	-0.5093	0.4373	0.0653
0.95	270	-0.3911	0.4881	0.0537