CLAS Physics Database

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Measurement E151M55

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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 :	1265 GeV
ε :	0.8263
E_beam :	1.0539 GeV
ε_L:	0.3799

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
0.05	42	1.0331	0.6817	0.1213
0.15	42	0.3067	0.5817	0.046
0.15	54	-0.4737	0.6319	0.0617
0.25	30	-0.3388	0.6297	0.0488
0.25	42	0.7151	0.5581	0.0867
0.25	54	0.4578	0.6694	0.0601
0.35	42	-0.7441	0.5219	0.0898
0.45	270	-0.0891	0.5398	0.0317
0.45	282	0.2272	0.4856	0.0396
0.55	258	-0.687	0.3837	0.0837
0.55	270	0.077	0.3777	0.0313
0.55	282	0.0843	0.3975	0.0315
0.55	294	1.5777	0.5483	0.182
0.65	246	-0.3462	0.433	0.0495
0.65	258	-0.2025	0.3354	0.0378
0.65	270	0.1938	0.3296	0.0372
0.65	282	0.5842	0.3786	0.0729
0.65	294	0.5089	0.6378	0.0652
0.75	126	1.0461	0.7232	0.1227
0.75	138	-0.3578	0.5395	0.0506
0.75	162	0.3801	0.6898	0.0526
0.75	234	0.1336	0.4716	0.0336
0.75	246	-0.1985	0.4327	0.0376
0.75	258	-0.002	0.3116	0.03
0.75	270	-0.2765	0.3425	0.0435
0.75	282	0.321	0.351	0.0473
0.75	294	0.1869	0.5135	0.0368
0.85	114	1.3675	0.6823	0.1584
0.85	126	0.5556	0.4372	0.07
0.85	138	0.819	0.4167	0.0979
0.85	150	-0.2358	0.3775	0.0402
0.85	162	0.4533	0.428	0.0597
0.85	174	0.2818	0.3886	0.0439
0.85	186	0.1217	0.4381	0.033
0.85	198	-0.2831	0.4254	0.044
0.85	210	0.5085	0.545	0.0652
0.85	222	0.2224	0.6283	0.0392
0.85	234	-0.9228	0.4397	0.1092
0.85	246	-0.6231	0.3966	0.077
0.85	258	0.3559	0.4059	0.0504
0.85	270	-0.2429	0.3463	0.0408
0.85	282	0.2891	0.3664	0.0445
0.95	102	0.4012	0.5465	0.0546
0.95	126	0.5121	0.4035	0.0655
0.95	138	-0.0276	0.4324	0.0302
0.95	150	-0.4746	0.3655	0.0618
0.95	162	-0.168	0.3549	0.0356
0.95	174	0.7786	0.4112	0.0935
0.95	186	0.283	0.4074	0.044
0.95	198	-0.1582	0.369	0.035
0.95	210	0.3856	0.4508	0.0531