CLAS Physics Database

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Measurement E151M65

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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 :	0.0121 GeV²
W :	1295 GeV
ε :	0.8686
E_beam :	1.0539 GeV
ε_L:	0.0564

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
0.25	42	0.7545	0.7307	0.0909
0.35	42	-0.1733	0.5508	0.0359
0.35	54	-0.3008	0.5916	0.0455
0.35	66	-1.5637	0.5453	0.1804
0.45	42	0.1174	0.6114	0.0328
0.45	258	-0.2922	0.5861	0.0448
0.55	30	0.3668	0.671	0.0514
0.55	42	-0.1174	0.5127	0.0328
0.55	54	-0.4528	0.6707	0.0596
0.55	222	-0.0793	0.6402	0.0313
0.55	234	-0.4049	0.4961	0.055
0.55	246	-0.6797	0.3647	0.0829
0.55	258	-0.7207	0.3909	0.0873
0.55	270	0.2847	0.5565	0.0441
0.65	138	1.0166	0.7375	0.1195
0.65	150	0.6158	0.6276	0.0762
0.65	162	-0.5948	0.5744	0.074
0.65	174	1.3318	0.7409	0.1545
0.65	186	1.5063	0.7666	0.174
0.65	198	-0.5901	0.6322	0.0735
0.65	210	0.1401	0.6228	0.034
0.65	222	0.1269	0.5114	0.0333
0.65	234	-0.1112	0.3796	0.0326
0.65	246	0.0437	0.3283	0.0304
0.65	258	-0.0613	0.3837	0.0308
0.65	270	0.3403	0.4573	0.049
0.75	138	0.9547	0.7307	0.1127
0.75	150	0.5798	0.5592	0.0725
0.75	162	-0.0236	0.5236	0.0301
0.75	174	0.1073	0.5423	0.0324
0.75	186	0.0249	0.6112	0.0301
0.75	210	-0.1319	0.5765	0.0335
0.75	222	-0.4045	0.4241	0.0549
0.75	234	0.45	0.4008	0.0593
0.75	246	0.1956	0.3502	0.0374
0.75	258	-0.1141	0.371	0.0327
0.75	270	-0.1128	0.4752	0.0326
0.85	162	-0.6559	0.5943	0.0804
0.85	210	1.2647	0.6138	0.147
0.85	222	1.1537	0.5687	0.1346
0.85	234	-0.0219	0.3603	0.0301
0.85	246	0.8657	0.393	0.103
0.85	258	0.5606	0.4011	0.0705
0.85	270	-0.4916	0.5205	0.0635