A Seesaw Mechanism in the Higgs Sector

Abstract

In this letter we revisit the seesaw Higgs mechanism. We show how a seesaw mechanism in a two Higgs doublets model can trigger the electroweak symmetry breaking if at least one of the eigenvalues of the squared mass matrix is negative. We then consider two special cases of interest. In the decoupling scenario, there is only one scalar degree of freedom in the low energy regime. In the degenerate scenario, all five degrees of freedom are in the low energy regime and will lead to observables effects at the LHC. Furthermore, in that scenario, it is possible to impose a discrete symmetry between the doublets that makes the extra neutral degrees of freedom stable. These are thus viable dark matter candidates. We find an interesting relation between the electroweak symmetry breaking mechanism and dark matter.

10 pages

References in corpus (6)

• Improved Naturalness with a Heavy Higgs: An Alternative Road to LHC Physics
• The Anthropic Landscape of String Theory
• Higgs-field Portal into Hidden Sectors
• Common Origin of Neutrino Mass, Dark Matter, and Baryogenesis
• The minimal non-minimal standard model
• A higher dimensional explanation of the excess of Higgs-like events at CERN LEP

Cited by in corpus (8)

• Heavy Dark Matter Through the Higgs Portal
• Electroweak Symmetry Breaking induced by Dark Matter
• Effective Theory for Dark Matter and a New Force in the Dark Matter Sector
• Unparticle-Higgs Mixing: MSW Resonances, See-saw Mechanism and Spinodal Instabilities
• Leptogenesis, Dark Matter and Higgs Phenomenology at TeV
• Dark matter as a localized scalar in the extra dimension
• Lowest Landau Level of Relativistic Field Theories in a Strong Background Field
• Phase structure and phase transitions of the SU(2) x O(N) symmetric scalar field theory