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Title: Volume modulus inflation and a low scale of SUSY breaking

Abstract

The relation between the Hubble constant and the scale of supersymmetry breaking is investigated in models of inflation dominated by a string modulus. Usually in this kind of model the gravitino mass is of the same order of magnitude as the Hubble constant, which is not desirable from the phenomenological point of view. It is shown that slow-roll saddle point inflation may be compatible with a low scale of supersymmetry breaking only if some corrections to the lowest-order Kaehler potential are taken into account. However, choosing an appropriate Kaehler potential is not enough. There are also conditions for the superpotential and, for example, the popular racetrack superpotential turns out to be not suitable. A model is proposed in which slow-roll inflation and a light gravitino are compatible. It is based on a superpotential with a triple gaugino condensation and the Kaehler potential with the leading string corrections. The problem of fine-tuning and experimental constraints are discussed for that model.

Authors:
;  [1]
  1. Institute of Theoretical Physics, University of Warsaw, ul. Hoza 69, PL-00-681 Warsaw (Poland)
Publication Date:
OSTI Identifier:
22156691
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2008; Journal Issue: 07; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; HUBBLE EFFECT; INFLATIONARY UNIVERSE; LIMITING VALUES; MASS; STRING MODELS; SUPERSYMMETRY; SYMMETRY BREAKING

Citation Formats

Badziak, Marcin, and Olechowski, Marek. Volume modulus inflation and a low scale of SUSY breaking. United States: N. p., 2008. Web. doi:10.1088/1475-7516/2008/07/021.
Badziak, Marcin, & Olechowski, Marek. Volume modulus inflation and a low scale of SUSY breaking. United States. https://doi.org/10.1088/1475-7516/2008/07/021
Badziak, Marcin, and Olechowski, Marek. Tue . "Volume modulus inflation and a low scale of SUSY breaking". United States. https://doi.org/10.1088/1475-7516/2008/07/021.
@article{osti_22156691,
title = {Volume modulus inflation and a low scale of SUSY breaking},
author = {Badziak, Marcin and Olechowski, Marek},
abstractNote = {The relation between the Hubble constant and the scale of supersymmetry breaking is investigated in models of inflation dominated by a string modulus. Usually in this kind of model the gravitino mass is of the same order of magnitude as the Hubble constant, which is not desirable from the phenomenological point of view. It is shown that slow-roll saddle point inflation may be compatible with a low scale of supersymmetry breaking only if some corrections to the lowest-order Kaehler potential are taken into account. However, choosing an appropriate Kaehler potential is not enough. There are also conditions for the superpotential and, for example, the popular racetrack superpotential turns out to be not suitable. A model is proposed in which slow-roll inflation and a light gravitino are compatible. It is based on a superpotential with a triple gaugino condensation and the Kaehler potential with the leading string corrections. The problem of fine-tuning and experimental constraints are discussed for that model.},
doi = {10.1088/1475-7516/2008/07/021},
url = {https://www.osti.gov/biblio/22156691}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 07,
volume = 2008,
place = {United States},
year = {2008},
month = {7}
}