Reconstruction of heavy quark current correlators at O(\alpha_s^3)
High Energy Physics - Phenomenology
2009-10-02 v1
Abstract
We construct approximate formulas for the O(\alpha_s^3) QCD contributions to vector, axial-vector, scalar and pseudo-scalar quark current correlators, which are valid for arbitrary values of momenta and masses. The derivation is based on conformal mapping and the Pade approximation procedure and incorporates known expansions in the low energy, threshold and high energy regions. We use our results to estimate additional terms in these expansions.
Keywords
Cite
@article{arxiv.0907.2120,
title = {Reconstruction of heavy quark current correlators at O(\alpha_s^3)},
author = {Y. Kiyo and A. Maier and P. Maierhoefer and P. Marquard},
journal= {arXiv preprint arXiv:0907.2120},
year = {2009}
}
Comments
24 pages, 4 figures