QCD Corrections to t anti-b H^- Associated Production in e^+ e^- Annihilation
Abstract
We calculate the QCD corrections to the cross section of e^+ e^- -> t anti-b H^- and its charge-conjugate counterpart within the minimal supersymmetric extension of the Standard Model. This process is particularly important if m_t < m_H + m_b and root(s) < 2 m_H, so that t -> b H^+ and e^+ e^- -> H^+ H^- are not allowed kinematically. Large logarithmic corrections that arise in the on-mass-shell scheme of quark mass renormalization, especially from the t anti-b H^- Yukawa coupling for large values of tan(beta), are resummed by adopting the modified minimal-subtraction scheme, so that the convergence behavior of the perturbative expansion is improved. The inclusion of the QCD corrections leads to a significant reduction of the theoretical uncertainties due to scheme and scale dependences.
Cite
@article{arxiv.hep-ph/0205312,
title = {QCD Corrections to t anti-b H^- Associated Production in e^+ e^- Annihilation},
author = {Bernd A. Kniehl and Fantina Madricardo and Matthias Steinhauser},
journal= {arXiv preprint arXiv:hep-ph/0205312},
year = {2011}
}
Comments
21 pages (Latex), 8 figures (Postscript); detailed discussion of scheme and scale dependences added