CLAS Physics Database

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Measurement E151M2918

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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_LU,
Beam asymmetry.
Beam: e, polarization: longitudinal
Target: p (Z=1, A=1), polarization: longitudinal
Final state: π⁺n, polarization: none

Q² :	0.0496 GeV²
W :	1235 GeV
ε :	0.9717
E_beam :	1.9889 GeV
ε_L:	0.352

Select data slice:
cos(θ_π⁺) =

Observable quantity measured (Y axis): A_LU,
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_LU	Stat. error	Syst. error
0.45	78	0.2484	0.2045	0.0304
0.55	78	-0.2454	0.2076	0.0304
0.55	90	0.1549	0.2	0.0302
0.55	270	0.2924	0.2439	0.0306
0.65	90	0.1865	0.2524	0.0302
0.65	246	0.2406	0.2535	0.0304
0.65	258	-0.0157	0.1897	0.03
0.65	270	-0.1978	0.2136	0.0303
0.75	114	0.2118	0.2507	0.0303
0.75	126	-0.0492	0.2317	0.03
0.75	138	0.1041	0.2127	0.0301
0.75	234	0.2413	0.2695	0.0304
0.75	246	-0.0425	0.1899	0.03
0.75	258	0.3476	0.1802	0.0308
0.75	270	-0.0218	0.1821	0.03
0.85	114	-0.0364	0.2236	0.03
0.85	126	0.2349	0.1769	0.0304
0.85	138	-0.2084	0.176	0.0303
0.85	150	-0.2368	0.1744	0.0304
0.85	162	-0.4737	0.1717	0.0315
0.85	174	-0.0935	0.1977	0.0301
0.85	186	-0.2256	0.2432	0.0303
0.85	234	0.171	0.229	0.0302
0.85	246	0.0725	0.2108	0.03
0.85	258	-0.1207	0.2519	0.0301
0.95	126	0.258	0.246	0.0304
0.95	150	0.1109	0.2273	0.0301
0.95	162	-0.1629	0.2334	0.0302
0.95	174	-0.2666	0.2594	0.0305
0.95	186	0.111	0.2341	0.0301