CLAS Physics Database

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Measurement E151M221

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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 :	1235 GeV
ε :	0.9364
E_beam :	1.3383 GeV
ε_L:	0.2909

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
0.15	42	0.399	0.4096	0.0399
0.25	30	0.8497	0.8543	0.0593
0.25	42	-0.4167	0.309	0.0454
0.25	54	0.4639	0.4231	0.0434
0.45	270	-0.5707	0.309	0.0486
0.45	282	0.0276	0.3396	0.0343
0.55	258	-0.3976	0.242	0.0387
0.55	270	0.1068	0.214	0.0316
0.55	282	0.3903	0.2947	0.0396
0.65	234	-0.4946	0.4806	0.0429
0.65	246	-0.0472	0.2462	0.0496
0.65	258	-0.1324	0.2066	0.0336
0.65	270	0.2035	0.2236	0.0325
0.65	282	0.123	0.2327	0.031
0.75	126	-0.0672	0.4026	0.0322
0.75	138	-0.2014	0.2956	0.038
0.75	150	-0.1358	0.4005	0.0465
0.75	162	-0.2749	0.3987	0.0534
0.75	222	0.3906	0.7228	0.0381
0.75	234	-0.5376	0.3357	0.0464
0.75	246	-0.1062	0.2208	0.0309
0.75	258	-0.135	0.1966	0.0311
0.75	270	0.1455	0.2172	0.0344
0.75	282	-0.2379	0.2309	0.0338
0.85	114	-0.0605	0.4284	0.0302
0.85	126	0.0089	0.3185	0.0304
0.85	138	-0.1862	0.242	0.0329
0.85	150	-0.2602	0.2637	0.0341
0.85	162	-0.2735	0.2498	0.0347
0.85	174	0.4025	0.2613	0.0397
0.85	186	-0.3817	0.2478	0.0472
0.85	198	0.0195	0.3256	0.0326
0.85	210	-0.6335	0.3152	0.0533
0.85	222	0.3212	0.3965	0.044
0.85	234	-0.2178	0.2889	0.0361
0.85	246	-0.4789	0.2272	0.0424
0.85	258	-0.4449	0.1817	0.0439
0.85	270	-0.2148	0.2248	0.0329
0.85	282	-0.0173	0.3806	0.0377
0.95	138	-0.5921	0.2682	0.047
0.95	150	-0.2342	0.2944	0.0333
0.95	162	0.1705	0.3087	0.0332
0.95	174	-0.2642	0.2886	0.0341
0.95	186	-0.2762	0.2899	0.0414
0.95	198	-0.34	0.4541	0.0363
0.95	210	-0.8566	0.3624	0.0609