CLAS Physics Database

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Measurement E151M405

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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 :	1535 GeV
ε :	0.6921
E_beam :	1.3383 GeV
ε_L:	0.0158

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
0.45	30	-1.2925	0.5949	0.0834
0.45	42	0.5895	0.6085	0.0471
0.45	222	0.7948	0.5748	0.0574
0.55	138	-0.0808	0.6765	0.0304
0.55	150	-0.6009	0.686	0.0478
0.55	210	0.7015	0.6617	0.0528
0.55	222	0.2888	0.6227	0.0349
0.55	234	0.132	0.5955	0.0311
0.65	138	0.0173	0.6759	0.03
0.65	150	-0.6003	0.6557	0.0478
0.65	210	0.9803	0.5607	0.0677
0.65	222	-0.663	0.6104	0.0508
0.75	222	0.4406	0.5805	0.0405
0.75	234	-0.1731	0.5644	0.0319
0.85	126	0.6688	0.7045	0.0511
0.85	138	0.0504	0.6609	0.0302
0.85	222	0.2559	0.6407	0.0339
0.85	234	-0.075	0.5734	0.0304
0.45	234	1.9552	1.2911	0.1215
0.55	138	0.2074	1.0984	0.0325
0.55	210	0.7873	1.2103	0.0561
0.55	222	1.4728	1.5043	0.0936
0.55	234	-0.2121	0.6909	0.0326
0.65	138	1.0365	1.282	0.0693
0.65	222	-0.8812	0.5832	0.061
0.65	234	0.3168	0.8458	0.0356
0.75	210	0.1216	0.9999	0.0309
0.75	222	0.6545	0.9619	0.0495
0.75	234	0.1856	0.9758	0.032
0.85	222	0.2017	0.9516	0.0324
0.85	234	-0.2853	0.9111	0.0346