An analytic Pade-motivated QCD coupling
Abstract
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 is equivalent to a Pad\'e (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.
Keywords
Cite
@article{arxiv.1002.1264,
title = {An analytic Pade-motivated QCD coupling},
author = {Hector E. Martinez and Gorazd Cvetic},
journal= {arXiv preprint arXiv:1002.1264},
year = {2015}
}
Comments
2 pages, 1 figure (double), to appear in the Proceedings of the VIII Latin American Symposium on Nuclear Physics and Applications, Santiago, Chile, 15-19 December 2009. Poster presented by H. E. Martinez