CLAS Physics Database

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Measurement E151M311

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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 :	0.0143 GeV²
W :	1385 GeV
ε :	0.8632
E_beam :	1.3383 GeV
ε_L:	0.0394

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
0.35	42	0.7905	0.579	0.0576
0.55	42	0.1941	0.5775	0.0323
0.55	126	-0.8913	0.6353	0.0628
0.55	222	-0.371	0.6384	0.0378
0.55	234	1.411	0.4953	0.0924
0.55	246	-0.5814	0.5704	0.0469
0.65	42	0.2919	0.6467	0.035
0.65	126	0.3342	0.6849	0.0364
0.65	138	-0.4135	0.5828	0.0394
0.65	150	0.0797	0.5706	0.0304
0.65	162	0.2965	0.677	0.0352
0.65	210	-0.2238	0.6181	0.033
0.65	222	1.0737	0.5254	0.0729
0.65	234	-0.6646	0.4193	0.0509
0.65	246	-0.1639	0.5116	0.0317
0.75	138	-0.5672	0.6409	0.0462
0.75	150	-0.562	0.6021	0.0459
0.75	210	-0.7498	0.496	0.0553
0.75	222	0.2593	0.4881	0.034
0.75	234	-0.3038	0.4511	0.0354
0.75	246	-0.1254	0.5155	0.031
0.75	258	-1.0767	0.4663	0.0731
0.85	210	0.0367	0.6216	0.0301
0.85	222	0.1386	0.4861	0.0312
0.85	234	-0.3404	0.4352	0.0367
0.85	246	0.2424	0.4872	0.0335
0.45	42	0.9616	1.1541	0.0652
0.55	42	-0.6536	0.6081	0.0495
0.55	222	-0.4808	0.6961	0.0417
0.55	234	0.6607	0.9153	0.0498
0.55	246	1.136	1.0319	0.0747
0.65	126	1.0943	1.198	0.0724
0.65	138	-0.5953	0.7481	0.0467
0.65	210	-0.0283	0.8173	0.03
0.65	222	3.4512	3.4512	0.21
0.65	234	-0.6726	0.4428	0.0504
0.65	246	-0.1642	0.7002	0.0316
0.75	138	-0.1387	0.9863	0.0311
0.75	150	-0.8656	0.7025	0.0601
0.75	210	-0.5636	0.7659	0.0453
0.75	222	1.2343	1.0149	0.0802
0.75	234	-0.8086	0.5003	0.0572
0.75	246	-0.0397	0.6293	0.0301
0.75	258	-0.6762	0.7055	0.0506
0.85	210	-0.1729	0.7839	0.0318
0.85	222	-0.1448	0.5844	0.0312
0.85	234	0.0968	0.6261	0.0306
0.85	246	0.3662	0.7598	0.0372