Two-loop contributions to electroweak precision observables in the MSSM
高能物理 - 唯象学
2007-05-23 v2
摘要
The evaluation of the two-loop MSSM-contributions to the electroweak precision observables M_W and s_w^eff at order(alpha_t^2), order(alpha_t alpha_b), order(alpha_b^2) is presented. These contributions enter via Delta(rho), and it is explained in detail how one can retain the true, non-vanishing value of the MSSM Higgs boson mass M_h in spite of using the gauge-less limit in the calculation. The numerical results can be sizeable, in particular for strong squark mixing. By comparing the results in the on-shell and DR-bar renormalization schemes, the remaining theoretical uncertainty is found to be small.
关键词
引用
@article{arxiv.hep-ph/0506259,
title = {Two-loop contributions to electroweak precision observables in the MSSM},
author = {J. Haestier and D. Stöckinger and G. Weiglein and S. Heinemeyer},
journal= {arXiv preprint arXiv:hep-ph/0506259},
year = {2007}
}
备注
Talk given by D.S. at the 2005 International Linear Collider Workshop - Stanford, USA. 6 pages, 5 figures, misprint corrected