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Do experiments suggest a hierarchy problem?

Francesco Vissani

Abstract

The hierarchy problem of the scalar sector of the standard model is reformulated, emphasizing the role of experimental facts that may suggest the existence of a new physics large mass scale, for instance indications of the instability of the matter, or indications in favor of massive neutrinos. In the see-saw model for the neutrino masses a hierarchy problem arises if the mass of the right-handed neutrinos is larger than approximatively $10^7$ GeV: this problem, and its possible solutions, are discussed.

Do experiments suggest a hierarchy problem?

Abstract

The hierarchy problem of the scalar sector of the standard model is reformulated, emphasizing the role of experimental facts that may suggest the existence of a new physics large mass scale, for instance indications of the instability of the matter, or indications in favor of massive neutrinos. In the see-saw model for the neutrino masses a hierarchy problem arises if the mass of the right-handed neutrinos is larger than approximatively GeV: this problem, and its possible solutions, are discussed.

Paper Structure

This paper contains 6 equations, 1 figure.

Figures (1)

  • Figure 1: The Feynman diagram originating the corrections in eq. (\ref{['corrections']}); $\nu_R$ denotes the right-handed neutrino of mass $M_R,$$\ell_L=(\nu_L,e_L)$ the leptonic- and $H$ the Higgs-doublets.