CLAS Physics Database

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Measurement E151M1175

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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 :	0.1205 GeV²
W :	1805 GeV
ε :	0.8401
E_beam :	2.999 GeV
ε_L:	0.0571

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	Stat. error	Syst. error
0.55	186	-0.4031	0.8992	0.042
0.55	210	1.4613	1.0728	0.1109
0.65	138	-0.1658	0.8988	0.0324
0.65	186	0.0385	1.0106	0.0301
0.65	198	-0.6271	0.7349	0.0548
0.65	210	0.2229	0.8776	0.0341
0.75	102	0.2276	0.8084	0.0343
0.75	114	-0.7889	0.7757	0.065
0.75	126	2.4618	1.1492	0.1824
0.75	198	-0.783	0.7886	0.0646
0.75	210	0.7321	0.8041	0.0613
0.75	222	-0.5198	0.7425	0.0484
0.75	270	-0.1025	0.8681	0.0309
0.75	282	0.2204	0.8102	0.0341
0.85	90	-0.3526	0.7049	0.0396
0.85	102	0.0331	0.6859	0.0301
0.85	114	0.1272	0.6812	0.0314
0.85	126	-0.8685	0.7816	0.0702
0.85	174	0.264	0.925	0.0357
0.85	186	0.2748	0.7888	0.0361
0.85	198	0.3688	0.6597	0.0403
0.85	210	0.7382	0.7966	0.0617
0.85	222	0.4923	0.7224	0.0468
0.85	234	-0.8643	0.613	0.0699
0.95	186	-0.3259	0.7377	0.0383
0.95	198	0.2965	0.8061	0.037
0.95	210	-0.8949	0.6206	0.072
0.95	234	-1.303	0.6239	0.0999