An analytic Pade-motivated QCD coupling

Journal Article · Wed Aug 04 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3480186· OSTI ID:21410812

Martinez, H E; Cvetic, G ^[1]

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1. Physics Department, Universidad Tecnica Federico Santa Maria, Casilla 110-V, Valparaiso (Chile)

We consider a modification of the Minimal Analytic (MA) coupling of Shirkov and Solovtsov. This modified MA (mMA) coupling reflects the desired analytic properties of the space-like observables. We show that an approximation by Dirac deltas of its discontinuity function {rho} is equivalent to a Pade(rational) approximation of the mMA coupling that keeps its analytic structure. We propose a modification to mMA that, as preliminary results indicate, could be an improvement in the evaluation of low-energy observables compared with other analytic couplings.

• OSTI ID: 21410812
• Journal Information: AIP Conference Proceedings, Vol. 1265, Issue 1; Conference: 8. Latin American symposium on nuclear physics and applications, Santiago (Chile), 15-19 Dec 2009; Other Information: DOI: 10.1063/1.3480186; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

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ELEMENTARY PARTICLES
FERMIONS
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