On the metastability of the Standard Model vacuum
High Energy Physics - Phenomenology
2010-05-28 v2
Abstract
If the Higgs mass m_H is as low as suggested by present experimental information, the Standard Model ground state might not be absolutely stable. We present a detailed analysis of the lower bounds on m_H imposed by the requirement that the electroweak vacuum be sufficiently long-lived. We perform a complete one-loop calculation of the tunnelling probability at zero temperature, and we improve it by means of two-loop renormalization-group equations. We find that, for m_H=115 GeV, the Higgs potential develops an instability below the Planck scale for m_t>(166\pm 2) GeV, but the electroweak vacuum is sufficiently long-lived for m_t < (175\pm 2) \GeV.
Keywords
Cite
@article{arxiv.hep-ph/0104016,
title = {On the metastability of the Standard Model vacuum},
author = {Gino Isidori and Giovanni Ridolfi and Alessandro Strumia},
journal= {arXiv preprint arXiv:hep-ph/0104016},
year = {2010}
}
Comments
LaTex 23 pages, 4 eps figures. Misprint in the abstract corrected, reference added