HQET vertex diagram: $\varepsilon$ expansion
High Energy Physics - Phenomenology
2020-09-30 v4 High Energy Physics - Theory
Mathematical Physics
math.MP
Abstract
Differential equations for the one-loop HQET vertex diagram with arbitrary self-energy insertions and arbitrary residual energies are reduced to the form and used to obtain the expansion in terms of Goncharov polylogarithms.
Cite
@article{arxiv.2008.00342,
title = {HQET vertex diagram: $\varepsilon$ expansion},
author = {A. G. Grozin},
journal= {arXiv preprint arXiv:2008.00342},
year = {2020}
}
Comments
7 pages; v2: ref [13] added, 2 typos fixed; v3: 1 ref added, 1 typo fixed; v4: 2 refs added