CLAS Physics Database

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Measurement E151M98

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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 :	0.0844 GeV²
W :	1325 GeV
ε :	0.761
E_beam :	1.0539 GeV
ε_L:	0.2457

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
0.25	42	-0.0552	0.7602	0.0307
0.45	270	-0.3526	0.7397	0.0501
0.55	246	0.294	0.627	0.0449
0.55	258	0.5368	0.5557	0.068
0.55	270	-0.6343	0.4503	0.0782
0.55	282	0.1822	0.689	0.0365
0.65	234	-0.3189	0.5155	0.0471
0.65	246	0.3518	0.4748	0.05
0.65	258	0.1351	0.4378	0.0337
0.65	270	0.2418	0.4433	0.0407
0.65	282	0.6496	0.6298	0.0798
0.75	126	1.4669	0.8261	0.1696
0.75	138	-0.008	0.7425	0.03
0.75	150	0.7062	0.6241	0.0858
0.75	162	-0.8084	0.6169	0.0967
0.75	174	-0.0724	0.7525	0.0311
0.75	198	2.6173	2.6173	0.2993
0.75	234	-0.0948	0.5271	0.0319
0.75	246	0.2309	0.4209	0.0399
0.75	258	-0.3457	0.3964	0.0495
0.75	270	0.2512	0.4642	0.0414
0.75	282	-0.6667	0.4187	0.0816
0.85	126	-0.2973	0.5193	0.0452
0.85	138	-0.6136	0.5202	0.076
0.85	150	0.3189	0.4581	0.0471
0.85	162	0.0649	0.6016	0.0309
0.85	174	0.4344	0.5703	0.0578
0.85	186	1.2846	0.6649	0.1492
0.85	222	0.1487	0.7325	0.0344
0.85	234	-0.1985	0.5977	0.0376
0.85	246	-0.0391	0.498	0.0303
0.85	258	-0.5773	0.4409	0.0722
0.85	270	-0.5278	0.3828	0.0671
0.85	282	-0.1253	0.3747	0.0332
0.95	102	0.1976	0.6587	0.0375
0.95	114	-0.4312	0.52	0.0575
0.95	126	-0.0229	0.5843	0.0301
0.95	138	0.7329	0.6256	0.0886
0.95	150	-1.2445	0.4582	0.1447
0.95	174	0.6894	0.5829	0.084
0.95	246	0.1831	0.5483	0.0365
0.95	258	0.0052	0.509	0.03
0.95	270	-0.4054	0.4293	0.055