CLAS Physics Database

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Measurement E151M218

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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 :	0.0245 GeV²
W :	1235 GeV
ε :	0.9452
E_beam :	1.3383 GeV
ε_L:	0.1817

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
0.25	42	-0.5102	0.4403	0.0436
0.25	54	0.0543	0.3974	0.0302
0.35	30	-0.272	0.4588	0.0344
0.35	42	0.0206	0.4448	0.03
0.35	54	0.4557	0.5096	0.0412
0.45	42	-0.432	0.4312	0.0402
0.45	270	-0.6299	0.3374	0.0492
0.45	282	-0.0932	0.4353	0.0306
0.55	246	-0.1791	0.3387	0.032
0.55	258	0.1788	0.3001	0.032
0.55	270	-0.0702	0.2639	0.0303
0.55	282	0.1416	0.385	0.0313
0.65	234	-0.3196	0.3272	0.0359
0.65	246	-0.5214	0.2485	0.0441
0.65	258	0.0828	0.2206	0.0304
0.65	270	0.0579	0.258	0.0302
0.65	282	-1.034	0.2414	0.0707
0.75	126	0.1497	0.4706	0.0314
0.75	138	-0.0535	0.359	0.0302
0.75	150	-0.4417	0.3231	0.0406
0.75	162	0.2015	0.3539	0.0325
0.75	174	0.0644	0.3634	0.0303
0.75	186	0.1406	0.3711	0.0312
0.75	222	-0.09	0.4314	0.0305
0.75	234	-0.1212	0.3412	0.0309
0.75	246	0.0301	0.2486	0.0301
0.75	258	-0.0256	0.2475	0.03
0.75	270	-0.221	0.2495	0.033
0.75	282	-0.0563	0.3976	0.0302
0.85	126	-0.6086	0.3889	0.0482
0.85	138	0.4709	0.3342	0.0418
0.85	150	-0.0651	0.324	0.0303
0.85	162	-0.0804	0.3074	0.0304
0.85	174	0.2558	0.3318	0.0339
0.85	186	0.2659	0.3466	0.0342
0.85	198	-0.3572	0.3642	0.0373
0.85	210	0.1566	0.4428	0.0315
0.85	222	-0.1551	0.3749	0.0315
0.85	234	-0.0789	0.3131	0.0304
0.85	246	-0.0754	0.2935	0.0304
0.85	258	0.1896	0.324	0.0322
0.85	270	0.1028	0.4104	0.0307
0.95	162	0.1462	0.4414	0.0313
0.15	42	0.1209	0.7564	0.0309
0.25	30	-0.9635	0.4151	0.0653
0.25	42	-0.1312	0.6515	0.031
0.25	54	0.7269	0.8979	0.0531
0.35	42	-0.7971	0.39	0.0566
0.45	270	0.4006	0.6053	0.0385
0.45	282	-0.6207	0.5143	0.0479
0.55	246	0.985	0.762	0.0665
0.55	258	0.2151	0.4528	0.0327
0.55	270	0.0948	0.3996	0.0305
0.55	282	-0.0325	0.5319	0.0301
0.65	234	-0.3499	0.4798	0.0367
0.65	246	0.6405	0.4726	0.0489
0.65	258	-0.4773	0.2859	0.0415
0.65	270	-0.4488	0.2867	0.0404
0.65	282	-0.5061	0.4078	0.0428
0.75	126	0.6399	0.7543	0.0488
0.75	138	-0.8698	0.3944	0.0604
0.75	150	0.3179	0.6586	0.0356
0.75	162	0.1272	0.5307	0.031
0.75	174	0.268	0.7378	0.0341
0.75	186	-0.043	0.6532	0.0301
0.75	198	1.1092	1.0602	0.0732
0.75	210	-0.4814	0.4751	0.0417
0.75	222	-0.3828	0.6719	0.0378
0.75	234	-0.4075	0.3629	0.0388
0.75	246	-0.3346	0.2944	0.0361
0.75	258	-0.3052	0.3254	0.0352
0.75	270	0.6705	0.5551	0.0503
0.75	282	-0.4175	0.4821	0.0391
0.85	126	0.6721	0.7165	0.0504
0.85	138	-0.4097	0.389	0.0388
0.85	150	1.5788	0.6309	0.0997
0.85	162	0.3298	0.4472	0.036
0.85	174	-0.2227	0.4329	0.0329
0.85	186	1.0235	0.7686	0.0685
0.85	198	-0.2711	0.4762	0.0342
0.85	210	-0.181	0.5362	0.0319
0.85	222	0.8168	0.632	0.0576
0.85	234	0.5901	0.5643	0.0465
0.85	246	-0.4427	0.311	0.0401
0.85	258	-0.0556	0.4036	0.0302
0.85	270	0.6596	0.6236	0.0498