Monodromy inflation at strong coupling: $4\pi$ in the sky

We present a simple effective field theory formulation of a general family of single-field flux monodromy models for which strong coupling effects at large field values can flatten the potential and activate higher-derivative operators. Both of these effects can suppress the tensor amplitude. These...

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Detalles Bibliográficos
Autores principales: D'Amico, Guido, Kaloper, Nemanja, Lawrence, Albion
Lenguaje:eng
Publicado: 2017
Materias:
hep-th
Particle Physics - Theory
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.121.091301
http://cds.cern.ch/record/2285565
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author D'Amico, Guido
Kaloper, Nemanja
Lawrence, Albion
author_facet D'Amico, Guido
Kaloper, Nemanja
Lawrence, Albion
author_sort D'Amico, Guido
collection CERN
description We present a simple effective field theory formulation of a general family of single-field flux monodromy models for which strong coupling effects at large field values can flatten the potential and activate higher-derivative operators. Both of these effects can suppress the tensor amplitude. These models are radiatively and nonperturbatively stable and can sustain ≳60 e folds of inflation. The dynamics combines features of both large-field chaotic inflation and k inflation. Reducing the tensor-scalar ratio below the observational bound r≲0.1 while keeping the scalar spectral index ns within experimental bounds either yields equilateral non-Gaussianity fNLeq≃O(1), close to the current observational bounds, or gives very small r.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2017
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spelling cern-22855652022-08-10T12:28:50Zdoi:10.1103/PhysRevLett.121.091301http://cds.cern.ch/record/2285565engD'Amico, GuidoKaloper, NemanjaLawrence, AlbionMonodromy inflation at strong coupling: $4\pi$ in the skyhep-thParticle Physics - TheoryWe present a simple effective field theory formulation of a general family of single-field flux monodromy models for which strong coupling effects at large field values can flatten the potential and activate higher-derivative operators. Both of these effects can suppress the tensor amplitude. These models are radiatively and nonperturbatively stable and can sustain ≳60 e folds of inflation. The dynamics combines features of both large-field chaotic inflation and k inflation. Reducing the tensor-scalar ratio below the observational bound r≲0.1 while keeping the scalar spectral index ns within experimental bounds either yields equilateral non-Gaussianity fNLeq≃O(1), close to the current observational bounds, or gives very small r.We present a simple effective field theory formulation of a general family of single field flux monodromy models for which strong coupling effects at large field values can flatten the potential and activate operators with higher powers of derivatives. These models are radiatively and non-perturbatively stable and can easily sustain $\ga 60$ efolds of inflation. The dynamics combines features of both large field chaotic inflation and $k$-inflation, both of which can suppress the tensor amplitude. Reducing the tensor-scalar ratio below the observational bound $r \lesssim 0.1$ while keeping the scalar spectral index $n_s$ within experimental bounds either yields equilateral nongaussianity $f_{NL}^{eq} \simeq {\cal O}(1)$, close to the current observational bounds, or ultimately gives very small $r$.arXiv:1709.07014BRX-TH-6323CERN-TH-2017-181Brandeis preprint BRX-TH 6323CERN preprint CERN-TH-2017-181oai:cds.cern.ch:22855652017-09-20
spellingShingle hep-th
Particle Physics - Theory
D'Amico, Guido
Kaloper, Nemanja
Lawrence, Albion
Monodromy inflation at strong coupling: $4\pi$ in the sky
title Monodromy inflation at strong coupling: $4\pi$ in the sky
title_full Monodromy inflation at strong coupling: $4\pi$ in the sky
title_fullStr Monodromy inflation at strong coupling: $4\pi$ in the sky
title_full_unstemmed Monodromy inflation at strong coupling: $4\pi$ in the sky
title_short Monodromy inflation at strong coupling: $4\pi$ in the sky
title_sort monodromy inflation at strong coupling: $4\pi$ in the sky
topic hep-th
Particle Physics - Theory
url https://dx.doi.org/10.1103/PhysRevLett.121.091301
http://cds.cern.ch/record/2285565
work_keys_str_mv AT damicoguido monodromyinflationatstrongcoupling4piinthesky
AT kalopernemanja monodromyinflationatstrongcoupling4piinthesky
AT lawrencealbion monodromyinflationatstrongcoupling4piinthesky

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