CLAS Physics Database

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Measurement E151M73

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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 :	0.0496 GeV²
W :	1295 GeV
ε :	0.8313
E_beam :	1.0539 GeV
ε_L:	0.2028

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	-0.2494	0.6961	0.0413
0.25	42	0.0375	0.7194	0.0303
0.35	30	0.7387	0.6538	0.0892
0.35	42	1.4685	0.6862	0.1698
0.45	42	1.4892	0.6861	0.1721
0.45	54	-0.079	0.8707	0.0313
0.45	270	0.4389	0.6253	0.0583
0.45	282	0.5934	0.7241	0.0739
0.55	246	-1.4155	0.4343	0.1638
0.55	258	0.2528	0.4679	0.0416
0.55	270	0.2408	0.427	0.0406
0.55	282	0.2086	0.5481	0.0382
0.65	234	0.0214	0.4808	0.0301
0.65	246	-0.1489	0.3826	0.0345
0.65	258	-0.3977	0.3206	0.0543
0.65	270	-0.2442	0.3654	0.0409
0.65	282	-0.935	0.4053	0.1105
0.75	126	0.2143	0.6128	0.0387
0.75	138	-0.3569	0.4871	0.0505
0.75	150	0.3699	0.5618	0.0517
0.75	162	0.9619	0.6037	0.1135
0.75	174	-0.2896	0.4976	0.0446
0.75	186	-0.004	0.6116	0.03
0.75	198	-0.8185	0.6053	0.0978
0.75	222	0.3088	0.6017	0.0462
0.75	234	0.5945	0.4649	0.074
0.75	246	0.2575	0.3571	0.0419
0.75	258	0.1216	0.348	0.033
0.75	270	0.0412	0.3402	0.0304
0.75	282	-0.2028	0.4824	0.0378
0.75	294	-0.0487	0.6471	0.0305
0.85	126	-0.0233	0.5192	0.0301
0.85	138	0.5761	0.5242	0.0721
0.85	150	-0.5747	0.4156	0.0719
0.85	162	0.6376	0.4722	0.0785
0.85	174	-0.0265	0.4776	0.0302
0.85	186	0.1053	0.4911	0.0323
0.85	198	-0.6977	0.532	0.0849
0.85	222	0.8833	0.7193	0.1049
0.85	234	-0.0883	0.4985	0.0316
0.85	246	-0.0279	0.33	0.0302
0.85	258	-0.1468	0.3054	0.0343
0.85	270	0.1763	0.3567	0.0361
0.85	282	0.0168	0.4102	0.0301
0.95	114	0.4752	0.5981	0.0618
0.95	126	0.2308	0.5762	0.0399
0.95	138	-0.4627	0.4651	0.0606
0.95	150	-0.0795	0.4436	0.0313
0.95	162	0.6063	0.6061	0.0752
0.95	174	0.0304	0.543	0.0302
0.95	258	-0.6234	0.369	0.077
0.95	270	0.051	0.4997	0.0306