Improved Higgs Mass Stability Bound in the Standard Model and Implications for Supersymmetry

Details Improved Higgs Mass Stability Bound in the Standard Model and Implications for Supersymmetry Improved Higgs Mass Stability Bound in the Standard Model and Implications for Supersymmetry

1994-09-30

arxiv.org/abs/hep-ph/9409458v1

Phys.Lett. B342 (1995) 171-179

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages + 7 postscript figures appended at the end, Latex, IEM-FT-93/94

Scientific paper

10.1016/0370-2693(94)01404-Z

We re-examine the lower bound on the mass of the Higgs boson, $M_H$, from Standard Model vacuum stability including next-to-leading-log radiative corrections. This amounts to work with the full one-loop effective potential, $V(\phi)$, improved by two-loop RGE, and allows to keep control of the scale invariance of $V$ in a wide range of the $\phi$-field. Our results show that the bound is ${\cal O}\ (10\ GeV)$ less stringent than in previous estimates. In addition we perform a detailed comparison between the SM lower bounds on $M_H$ and the supersymmetric upper bounds on it. It turns out that depending on the actual value of the top mass, $M_t$, the eventually measured Higgs mass can discard the pure SM, the Minimal Supersymmetric Standard Model or both.

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