CLAS Physics Database

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Measurement E151M204

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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 :	0.0415 GeV²
W :	1205 GeV
ε :	0.9477
E_beam :	1.3383 GeV
ε_L:	0.3688

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
0.55	270	0.8167	0.422	0.0588
0.55	282	-0.8164	0.3044	0.0588
0.65	258	0.0923	0.3741	0.0305
0.65	270	-0.1007	0.3516	0.0306
0.65	282	-0.1529	0.3713	0.0315
0.75	258	0.1594	0.3138	0.0316
0.75	270	0.4771	0.3724	0.0421
0.75	282	0.1365	0.4613	0.0312
0.85	138	-0.1451	0.3788	0.0313
0.85	150	0.5881	0.3294	0.0472
0.85	162	0.1509	0.3567	0.0314
0.85	174	-0.3101	0.2992	0.0356
0.85	186	0.2871	0.414	0.0349
0.85	198	0.0668	0.4096	0.0303
0.85	210	0.5683	0.3907	0.0462
0.95	138	0.0747	0.4077	0.0304
0.95	174	-0.0382	0.3757	0.0301
0.45	282	0.0848	0.6458	0.0304
0.55	258	-0.3471	0.5389	0.0366
0.55	270	-0.1007	0.4985	0.0306
0.55	282	0.8238	0.7286	0.058
0.65	246	-0.3438	0.6076	0.0365
0.65	258	-0.4187	0.4355	0.0392
0.65	270	0.0464	0.4207	0.0301
0.65	282	-0.668	0.3577	0.0502
0.75	246	-0.1224	0.5563	0.0309
0.75	258	0.1009	0.4529	0.0306
0.75	270	0.068	0.4533	0.0303
0.85	138	0.5908	0.6831	0.0465
0.85	150	0.1939	0.5459	0.0322
0.85	162	0.3638	0.6844	0.0371
0.85	174	-0.8606	0.277	0.0599
0.85	186	-0.4897	0.4763	0.0421
0.85	198	-0.4796	0.4338	0.0416
0.85	210	1.1726	0.8896	0.0767
0.85	222	-0.1628	0.4942	0.0316
0.85	234	-0.3651	0.4776	0.0372
0.85	246	-0.5109	0.4512	0.043
0.95	150	0.206	0.7341	0.0325
0.95	162	0.9639	0.873	0.0653
0.95	174	-0.6271	0.3337	0.0482
0.95	186	-0.4249	0.417	0.0394