Three-Loop Leading Top Mass Contributions to the rho Parameter
High Energy Physics - Phenomenology
2009-10-31 v2
Abstract
We present analytical results for the leading contributions of the top quark to the electroweak rho parameter at order GF^3 Mt^6 and GF^2 Mt^4 alpha_s. The Higgs boson and the gauge bosons are taken to be massless in this limit. The correction of order GF^3 Mt^6 is found to be sizeable in comparison to the the leading two-loop GF^2 Mt^4 correction, however it is much smaller than the subleading GF^2 Mt^2 MZ^2 correction.
Cite
@article{arxiv.hep-ph/0011373,
title = {Three-Loop Leading Top Mass Contributions to the rho Parameter},
author = {J. J. van der Bij and K. G. Chetyrkin and M. Faisst and G. Jikia and T. Seidensticker},
journal= {arXiv preprint arXiv:hep-ph/0011373},
year = {2009}
}
Comments
10 pages, 2 figures, Latex. v2: two minor corrections in the references. Accepted for publication in Phys. lett. B. The complete paper is also available via the www at http://www-ttp.physik.uni-karlsruhe.de/Preprints/