Matching coefficients for alpha_s and m_b to O(alpha_s^2) in the MSSM
High Energy Physics - Phenomenology
2010-04-15 v2
Abstract
We compute the exact two-loop matching coefficients for the strong coupling constant alpha_s and the bottom-quark mass m_b within the Minimal Supersymmetric Standard Model (MSSM), taking into account O(alpha_s^2) contributions from Supersymmetric Quantum Chromodynamics (SQCD). We find that the explicit mass pattern of the supersymmetric particles has a significant impact on the predictions of alpha_s and m_b at high energies. Further on, the three-loop corrections exceed the uncertainty due to the current experimental accuracy. In case of the the running bottom-quark mass, they can reach in the large tan(beta) regime up to 30% of the tree-level value.
Keywords
Cite
@article{arxiv.0810.5101,
title = {Matching coefficients for alpha_s and m_b to O(alpha_s^2) in the MSSM},
author = {A. Bauer and L. Mihaila and J. Salomon},
journal= {arXiv preprint arXiv:0810.5101},
year = {2010}
}
Comments
25 pages, 5 figures