CLAS Physics Database

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Measurement E151M27

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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 :	0.9058
E_beam :	1.0539 GeV
ε_L:	0.1741

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	0.595	0.5328	0.074
0.15	54	-0.1818	0.5968	0.0364
0.25	30	0.9051	0.5127	0.1073
0.25	42	-0.6356	0.3764	0.0783
0.25	54	0.171	0.44	0.0358
0.35	30	-0.1647	0.5387	0.0354
0.35	42	0.1936	0.4156	0.0372
0.35	54	0.6909	0.3789	0.0841
0.45	42	0.6764	0.4113	0.0826
0.45	54	0.4855	0.4653	0.0629
0.45	66	-0.1456	0.5623	0.0343
0.45	270	-0.5412	0.3783	0.0685
0.45	282	-0.6941	0.3323	0.0845
0.55	246	0.1223	0.3805	0.0331
0.55	258	0.1732	0.2765	0.0359
0.55	270	-0.0229	0.2927	0.0301
0.55	282	-0.2403	0.3205	0.0406
0.65	234	0.479	0.4008	0.0622
0.65	246	-0.4032	0.2894	0.0548
0.65	258	0.1132	0.2488	0.0326
0.65	270	-0.2981	0.2228	0.0453
0.65	282	0.1424	0.3234	0.0341
0.75	126	0.3539	0.5503	0.0502
0.75	138	-0.0201	0.4503	0.0301
0.75	150	0.3047	0.3968	0.0458
0.75	162	-0.0847	0.3531	0.0315
0.75	174	0.3712	0.3467	0.0518
0.75	186	0.1414	0.4292	0.034
0.75	198	-1.2499	0.2614	0.1453
0.75	210	-0.0439	0.3784	0.0304
0.75	222	-0.89	0.3541	0.1056
0.75	234	-0.1931	0.3234	0.0372
0.75	246	-0.0654	0.2746	0.0309
0.75	258	-0.1417	0.231	0.0341
0.75	270	0.0925	0.236	0.0318
0.75	282	-0.6867	0.3561	0.0837
0.85	138	-0.0205	0.4604	0.0301
0.85	150	-0.548	0.311	0.0692
0.85	162	-0.4713	0.3084	0.0614
0.85	174	-0.4029	0.292	0.0548
0.85	186	0.027	0.3156	0.0302
0.85	198	0.1303	0.3808	0.0335
0.85	210	-0.2771	0.3935	0.0435
0.85	222	0.5812	0.4131	0.0726
0.85	234	0.6722	0.3581	0.0822
0.85	246	0.2316	0.4744	0.0399
0.85	258	0.0966	0.3093	0.0319
0.85	270	-0.0114	0.4077	0.03