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Title: Two-field analysis of no-scale supergravity inflation

Abstract

Since the building-blocks of supersymmetric models include chiral superfields containing pairs of effective scalar fields, a two-field approach is particularly appropriate for models of inflation based on supergravity. In this paper, we generalize the two-field analysis of the inflationary power spectrum to supergravity models with arbitrary Kähler potential. We show how two-field effects in the context of no-scale supergravity can alter the model predictions for the scalar spectral index n s and the tensor-to-scalar ratio r, yielding results that interpolate between the Planck-friendly Starobinsky model and BICEP2-friendly predictions. In particular, we show that two-field effects in a chaotic no-scale inflation model with a quadratic potential are capable of reducing r to very small values << 0.1. Here, we also calculate the non-Gaussianity measure f NL, finding that is well below the current experimental sensitivity.

Authors:
 [1];  [2];  [3];  [2]
  1. King's College London, London (United Kingdom). Theoretical Particle Physics and Cosmology Group; European Organization for Nuclear Research (CERN), Geneva (Switzerland). Theory Div.
  2. Univ. of Minnesota, Minneapolis, MN (United States). William I. Fine Theoretical Physics Inst.
  3. Texas A & M Univ., College Station, TX (United States). George P. and Cynthia W. Mitchell Inst. for Fundamental Physics and Astronomy; Houston Advanced Research Center (HARC), Woodlands, TX (United States). Astroparticle Physics Group; Academy of Athens, Athens (Greece), Div. of Natural Sciences
Publication Date:
Research Org.:
Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1454606
Grant/Contract Number:  
SC0011842; FG03-95ER40917
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2015; Journal Issue: 01; Journal ID: ISSN 1475-7516
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTRONOMY AND ASTROPHYSICS; inflation; supersymmetry and cosmology; particle physics - cosmology connection

Citation Formats

Ellis, John, Garcia, Marcos A. G., Nanopoulos, Dimitri V., and Olive, Keith A. Two-field analysis of no-scale supergravity inflation. United States: N. p., 2015. Web. doi:10.1088/1475-7516/2015/01/010.
Ellis, John, Garcia, Marcos A. G., Nanopoulos, Dimitri V., & Olive, Keith A. Two-field analysis of no-scale supergravity inflation. United States. doi:10.1088/1475-7516/2015/01/010.
Ellis, John, Garcia, Marcos A. G., Nanopoulos, Dimitri V., and Olive, Keith A. Thu . "Two-field analysis of no-scale supergravity inflation". United States. doi:10.1088/1475-7516/2015/01/010. https://www.osti.gov/servlets/purl/1454606.
@article{osti_1454606,
title = {Two-field analysis of no-scale supergravity inflation},
author = {Ellis, John and Garcia, Marcos A. G. and Nanopoulos, Dimitri V. and Olive, Keith A.},
abstractNote = {Since the building-blocks of supersymmetric models include chiral superfields containing pairs of effective scalar fields, a two-field approach is particularly appropriate for models of inflation based on supergravity. In this paper, we generalize the two-field analysis of the inflationary power spectrum to supergravity models with arbitrary Kähler potential. We show how two-field effects in the context of no-scale supergravity can alter the model predictions for the scalar spectral index ns and the tensor-to-scalar ratio r, yielding results that interpolate between the Planck-friendly Starobinsky model and BICEP2-friendly predictions. In particular, we show that two-field effects in a chaotic no-scale inflation model with a quadratic potential are capable of reducing r to very small values << 0.1. Here, we also calculate the non-Gaussianity measure fNL, finding that is well below the current experimental sensitivity.},
doi = {10.1088/1475-7516/2015/01/010},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 01,
volume = 2015,
place = {United States},
year = {2015},
month = {1}
}

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Cited by: 23 works
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