On the metastability of the Standard Model vacuum

Preprint

31 May 2001

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ph/0104016

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

All Related Versions

Version 1, 2001-04-02, ArXiv
Version 2, 2001-05-31, ArXiv
Published version: Nuclear Physics B, 609 (3), 387.

This publication has 0 references indexed in Scilit: