CLAS Physics Database

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Measurement E151M398

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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 :	0.101 GeV²
W :	1505 GeV
ε :	0.66
E_beam :	1.3383 GeV
ε_L:	0.1063

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	222	0.4134	0.4159	0.0862
0.55	234	-0.0242	0.4006	0.0473
0.55	246	0.2242	0.439	0.0489
0.65	138	-0.738	0.638	0.0536
0.65	150	-0.0424	0.9661	0.0301
0.65	222	-0.2306	0.6837	0.0331
0.65	234	0.162	0.7683	0.0315
0.65	246	-0.8693	0.4373	0.0603
0.65	258	0.2679	0.761	0.0341
0.75	138	0.0832	0.8372	0.0304
0.75	162	-0.55	0.7784	0.0447
0.75	222	2.0309	0.9873	0.1259
0.75	234	2.0375	2.0375	0.1263
0.75	246	0.1213	0.6701	0.0309
0.75	258	0.8359	0.823	0.0586
0.85	222	0.9155	0.9892	0.0628
0.85	234	-0.1999	0.645	0.0323
0.85	246	-0.06	0.5905	0.0302
0.85	258	-0.4504	0.4564	0.0404
0.95	102	1.5199	1.1117	0.0963
0.95	114	0.7754	0.9655	0.0555
0.95	222	2.7611	2.7611	0.169
0.95	234	1.0342	0.8029	0.0691
0.95	246	1.4035	0.9632	0.0897
0.95	258	-0.0975	0.6193	0.0306
0.55	258	0.6372	0.5832	0.0496
0.65	126	-0.9971	0.5224	0.0686
0.65	138	-1.234	0.4961	0.0821
0.65	150	-0.2724	0.5768	0.0344
0.65	222	0.452	0.524	0.041
0.65	234	0.4193	0.4655	0.0397
0.65	246	-0.0749	0.5187	0.0304
0.65	258	0.3082	0.5066	0.0356
0.75	126	-2.0172	0.3784	0.1285
0.75	138	-1.7684	0.4329	0.1135
0.75	162	0.606	0.6589	0.048
0.75	222	0.7748	0.5136	0.0566
0.75	234	0.0564	0.5207	0.0302
0.75	246	-0.1775	0.4141	0.0319
0.75	258	0.732	0.4616	0.0544
0.85	222	0.2027	0.58	0.0325
0.85	234	1.5548	0.4683	0.1008
0.85	246	0.7369	0.5165	0.0546
0.85	258	-0.0832	0.473	0.0304
0.85	270	-0.1939	0.5348	0.0323
0.95	114	-0.3088	0.4988	0.0356
0.95	234	0.8952	0.482	0.063