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Title: Higgsed Gauge-flation

Abstract

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.

Authors:
 [1];  [1]
  1. Univ. of Illinois, Urbana-Champaign, IL (United States). Dept. of Physics
Publication Date:
Research Org.:
Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Org.:
USDOE; University of Illinois
OSTI Identifier:
1425950
Grant/Contract Number:  
SC0015655
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2017; Journal Issue: 8; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Cosmology of Theories beyond the SM; Spontaneous Symmetry Breaking

Citation Formats

Adshead, Peter, and Sfakianakis, Evangelos I. Higgsed Gauge-flation. United States: N. p., 2017. Web. https://doi.org/10.1007/JHEP08(2017)130.
Adshead, Peter, & Sfakianakis, Evangelos I. Higgsed Gauge-flation. United States. https://doi.org/10.1007/JHEP08(2017)130
Adshead, Peter, and Sfakianakis, Evangelos I. Tue . "Higgsed Gauge-flation". United States. https://doi.org/10.1007/JHEP08(2017)130. https://www.osti.gov/servlets/purl/1425950.
@article{osti_1425950,
title = {Higgsed Gauge-flation},
author = {Adshead, Peter and Sfakianakis, Evangelos I.},
abstractNote = {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.},
doi = {10.1007/JHEP08(2017)130},
journal = {Journal of High Energy Physics (Online)},
number = 8,
volume = 2017,
place = {United States},
year = {2017},
month = {8}
}

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Cited by: 11 works
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