On the Evaluation of Threshold Effects in Processes Involving Heavy Quarks
High Energy Physics - Phenomenology
2010-11-01 v1
Abstract
A detailed evaluation is presented of production of heavy fermions (particularly ttbar quarks) by a vector current, in the region around threshold. This includes bound states as well as the region above threshold, to the same degree of accuracy; in both cases radiative and nonperturbative corrections are included. The contribution of this region to the vacuum polarization (``threshold effects'') is calculated and compared with a perturbative calculation; the importance of the threshold effects is found substantially smaller than claimed by some authors. Open fermion-antifermion production is also discussed.
Keywords
Cite
@article{arxiv.hep-ph/9311323,
title = {On the Evaluation of Threshold Effects in Processes Involving Heavy Quarks},
author = {F. J. Yndurain},
journal= {arXiv preprint arXiv:hep-ph/9311323},
year = {2010}
}
Comments
12 pages, preprint FTUAM 38/93