Two-loop QCD corrections to charged-Higgs-mediated $b\to s\gamma$ decay
High Energy Physics - Phenomenology
2009-10-09 v2
Abstract
The charged-Higgs-mediated contribution to the Wilson coefficient of the magnetic penguin is expected to be one of the more promising candidates for a supersymmetric effect in B physics, probably the only one in gauge-mediated models. We compute the two-loop QCD correction to it. With naive dimensional regularization and MSbar subtraction, for reasonable values of the charged Higgs mass and for mu-bar = m_top, we find a (10--20)% reduction of the corresponding one-loop effect.
Keywords
Cite
@article{arxiv.hep-ph/9710312,
title = {Two-loop QCD corrections to charged-Higgs-mediated $b\to s\gamma$ decay},
author = {P. Ciafaloni and A. Romanino and A. Strumia},
journal= {arXiv preprint arXiv:hep-ph/9710312},
year = {2009}
}
Comments
10 pages, 2 figures. Misprints corrected. Comparison with hep-ph/9710335 added