Gravity-Assisted Emergent Higgs Mechanism in the Post-Inflationary Epoch

Abstract

We consider a non-standard model of gravity coupled to a neutral scalar "inflaton" as well as to SU(2)xU(1) iso-doublet scalar with positive mass squared and without self-interaction, and to SU(2)xU(1) gauge fields. The principal new ingredient is employing two alternative non-Riemannian space-time volume-forms (covariant integration measure densitities) independent of the metric. The latter have a remarkable impact - although not introducing any additional propagating degrees of freedom, their dynamics triggers a series of important features: appearance of infinitely large flat regions of the effective "inflaton" potential as well as dynamical generation of Higgs-like spontaneous symmetry breaking effective potential for the SU(2)xU(1) iso-doublet scalar.

v.2 10 pages, Honorable Mention in the Gravity Research Foundation Essay Competition 2016 (http://www.gravityresearchfoundation.org/pdf/2016_Awards.pdf), to appear in International Journal of Modern Physics D (2016)

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• Emergent Cosmology, Inflation and Dark Energy
• Unified Dark Energy and Dust Dark Matter Dual to Quadratic Purely Kinetic K-Essence
• Vacuum Structure and Gravitational Bags Produced by Metric-Independent Spacetime Volume-Form Dynamics
• A New Venue of Spontaneous Supersymmetry Breaking in Supergravity

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