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Title: Monodromy Inflation in the Strong Coupling Regime of the Effective Field Theory

Abstract

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 n s within experimental bounds either yields equilateral non-Gaussianity f eq NL ≃ O(1) , close to the current observational bounds, or gives very small r .

Authors:
; ;
Publication Date:
Research Org.:
Brandeis Univ., Waltham, MA (United States); Univ. of California, Davis, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1467761
Alternate Identifier(s):
OSTI ID: 1502070
Grant/Contract Number:  
SC0009999; SC0009987
Resource Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Name: Physical Review Letters Journal Volume: 121 Journal Issue: 9; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

D’Amico, Guido, Kaloper, Nemanja, and Lawrence, Albion. Monodromy Inflation in the Strong Coupling Regime of the Effective Field Theory. United States: N. p., 2018. Web. doi:10.1103/PhysRevLett.121.091301.
D’Amico, Guido, Kaloper, Nemanja, & Lawrence, Albion. Monodromy Inflation in the Strong Coupling Regime of the Effective Field Theory. United States. doi:10.1103/PhysRevLett.121.091301.
D’Amico, Guido, Kaloper, Nemanja, and Lawrence, Albion. Thu . "Monodromy Inflation in the Strong Coupling Regime of the Effective Field Theory". United States. doi:10.1103/PhysRevLett.121.091301.
@article{osti_1467761,
title = {Monodromy Inflation in the Strong Coupling Regime of the Effective Field Theory},
author = {D’Amico, Guido and Kaloper, Nemanja and Lawrence, Albion},
abstractNote = {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 feqNL ≃ O(1) , close to the current observational bounds, or gives very small r .},
doi = {10.1103/PhysRevLett.121.091301},
journal = {Physical Review Letters},
number = 9,
volume = 121,
place = {United States},
year = {2018},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevLett.121.091301

Citation Metrics:
Cited by: 5 works
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Figures / Tables:

FIG. 1. FIG. 1. : Planck constraints in the nsr plane for the ΛCDM model for Veff ∼ $\phi$p, with p’s listed in the legend, and a quartic kinetic term. The solid lines denote cs = 1; the dashed lines cs = 0.6. The colored circles denote normalizations at 50more » (left) and 60 e folds (right).« less

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