Twin Peak Higgs

Abstract

A broad class of models in which electroweak symmetry breaking originates from dynamics in a singlet dark sector, and is transferred to the Standard Model via the Higgs portal, predicts in general strongly suppressed Higgs boson mixing with a singlet scalar. In this work we point out that at present this class of models allows for the second phenomenologically acceptable solution with almost maximal mixing between the Higgs and the scalar singlet. This scenario predicts an almost degenerate twin peak Higgs signal which is presently indistinguishable from a single peak, due to the limited LHC mass resolution. Because of that, the LHC experiments measure inclusive Higgs rates that all must exactly agree with Standard Model predictions due to sum rules. We show that if the dark sector and Standard Model communicate only via the singlet messenger scalar that mixes with the Higgs, the spin independent direct detection cross section of dark matter is suppressed by the scalar mass degeneracy, explaining its non-observation so far.

6 pages, 3 figures, 1 table. Final version to be published in Physics Letters B

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Cited by in corpus (14)

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• Towards Completing the Standard Model: Vacuum Stability, EWSB and Dark Matter
• Poincare Protection for a Natural Electroweak Scale
• Two-loop stability of a complex singlet extended Standard Model
• A Radiative Model for the Weak Scale and Neutrino Mass via Dark Matter
• Viable dark matter via radiative symmetry breaking in a scalar singlet Higgs portal extension of the standard model
• Galactic Centre GeV Photons from Dark Technicolor
• Low-energy phenomenology of trinification: an effective left-right-symmetric model
• Multi-scale Renormalization Group Methods for Effective Potentials with Multiple Scalar Fields
• Comments on the Hierarchy Problem in Effective Theories
• Higgs pair signal enhanced in the 2HDM with two degenerate 125 GeV Higgs bosons
• Triple Higgs Coupling as a Probe of the Twin-Peak Scenario
• Purely Radiative Higgs Mass in Scale invariant models