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Title: Higgsed Gauge-flation

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2]
  1. Univ. of Illinois, Urbana-Champaign, IL (United States). Dept. of Physics; Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL 61801, U.S.A
  2. Univ. of Illinois, Urbana-Champaign, IL (United States). Dept. of Physics

We study a variant of Gauge-flation where the gauge symmetry is spontaneously broken by a Higgs sector. Here, we work in the Stueckelberg limit and demonstrate that the dynamics remain (catastrophically) unstable for cases where the gauge field masses satisfy γ< 2, where γ= g2 2=ψH2, g is the gauge coupling, ψ is the gauge field vacuum expectation value, and H is the Hubble rate. We compute the spectrum of density uctuations and gravitational waves, and show that the model can produce observationally viable spectra. The background gauge field texture violates parity, resulting in a chiral gravitational wave spectrum. This arises due to an exponential enhancement of one polarization of the spin-2 fluctuation of the gauge field. Higgsed Gauge-flation can produce observable gravitational waves at in inflationary energy scales well below the GUT scale.

Research Organization:
Univ. of Illinois, Urbana-Champaign, IL (United States)
Sponsoring Organization:
USDOE; University of Illinois
Grant/Contract Number:
SC0015655
OSTI ID:
1425950
Journal Information:
Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 8 Vol. 2017; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (11)

Non-Abelian gauge preheating journal December 2017
Stability conditions in the generalized S U ( 2 ) Proca theory journal October 2019
Axion gauge field inflation and gravitational leptogenesis: A lower bound on B modes from the matter-antimatter asymmetry of the Universe journal January 2018
A new mechanism to enhance primordial tensor fluctuations in single field inflation journal December 2018
Probing non-Gaussian stochastic gravitational wave backgrounds with LISA text January 2018
Probing non-Gaussian stochastic gravitational wave backgrounds with LISA journal November 2018
Squeezed tensor non-Gaussianity in non-attractor inflation journal September 2019
Tensor non-gaussianities from non-minimal coupling to the inflaton journal February 2019
A new mechanism to enhance primordial tensor fluctuations in single field inflation text January 2018
Squeezed tensor non-Gaussianity in non-attractor inflation text January 2019
Probing non-Gaussian Stochastic Gravitational Wave Backgrounds with LISA text January 2018

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