CLAS Physics Database

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Measurement E151M75

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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 :	0.0707 GeV²
W :	1295 GeV
ε :	0.8099
E_beam :	1.0539 GeV
ε_L:	0.2682

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
0.15	42	0.618	0.7755	0.0764
0.25	30	-0.1936	0.74	0.0372
0.25	42	-0.2169	0.7354	0.0388
0.35	30	0.7028	0.8072	0.0854
0.35	42	0.3708	0.7399	0.0518
0.45	270	0.0194	0.5839	0.0301
0.55	246	0.3454	0.6421	0.0494
0.55	258	0.0189	0.4582	0.0301
0.55	270	-0.2624	0.3493	0.0423
0.55	282	-0.5913	0.5101	0.0737
0.65	234	-0.5478	0.5279	0.0692
0.65	246	0.5289	0.4101	0.0672
0.65	258	0.3296	0.3611	0.048
0.65	270	-0.5146	0.3401	0.0658
0.65	282	-0.2666	0.5184	0.0427
0.75	126	-0.4824	0.5755	0.0625
0.75	138	0.0968	0.548	0.032
0.75	150	-0.1673	0.4882	0.0355
0.75	162	0.6791	0.5811	0.0829
0.75	222	-0.6686	0.5867	0.0818
0.75	234	0.4392	0.5214	0.0583
0.75	246	0.6267	0.4227	0.0774
0.75	258	0.5945	0.3936	0.074
0.75	270	0.4502	0.3745	0.0594
0.75	282	-0.1881	0.3958	0.0369
0.75	294	-0.1261	0.6462	0.0333
0.85	114	-0.2521	0.6473	0.0415
0.85	126	-0.3479	0.4886	0.0497
0.85	138	-0.1971	0.4841	0.0375
0.85	150	-0.4558	0.4077	0.0599
0.85	162	1.2578	0.5304	0.1462
0.85	174	0.1601	0.4747	0.0351
0.85	186	0.0121	0.5486	0.03
0.85	198	-0.3101	0.5293	0.0463
0.85	222	0.3881	0.5781	0.0534
0.85	234	-1.0408	0.4383	0.1222
0.85	246	0.0695	0.414	0.031
0.85	258	-0.6124	0.3154	0.0759
0.85	270	0.4213	0.3582	0.0565
0.85	282	-0.5549	0.4	0.0699
0.95	102	0.887	0.5752	0.1053
0.95	114	-0.4982	0.5086	0.0641
0.95	126	-0.0736	0.4841	0.0311
0.95	138	0.7835	0.4847	0.0941
0.95	150	-0.7499	0.3918	0.0904
0.95	162	0.8499	0.4956	0.1012
0.95	174	-0.1472	0.5472	0.0344
0.95	186	0.4282	0.5364	0.0572
0.95	234	-0.543	0.4857	0.0687
0.95	258	0.2895	0.5255	0.0445