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Title: Phenomenological aspects of no-scale inflation models

Abstract

We discuss phenomenological aspects of inflationary models wiith a no-scale supergravity Kähler potential motivated by compactified string models, in which the inflaton may be identified either as a Kähler modulus or an untwisted matter field, focusing on models that make predictions for the scalar spectral index n s and the tensor-to-scalar ratio r that are similar to the Starobinsky model. We discuss possible patterns of soft supersymmetry breaking, exhibiting examples of the pure no-scale type m 0 = B 0 = A 0 = 0, of the CMSSM type with universal A 0 and m 0 ≠ 0 at a high scale, and of the mSUGRA type with A 0 = B 0 + m 0 boundary conditions at the high input scale. These may be combined with a non-trivial gauge kinetic function that generates gaugino masses m 1/2 ≠ 0, or one may have a pure gravity mediation scenario where trilinear terms and gaugino masses are generated through anomalies. We also discuss inflaton decays and reheating, showing possible decay channels for the inflaton when it is either an untwisted matter field or a Kähler modulus. Reheating is very efficient if a matter field inflaton is directly coupled to MSSMmore » fields, and both candidates lead to sufficient reheating in the presence of a non-trivial gauge kinetic function.« less

Authors:
 [1];  [2];  [3];  [2]
  1. King's College London (United Kingdom). Theoretical Particle Physics and Cosmology Group. Dept. of Physics; European Organization for Nuclear Research (CERN), Geneva (Switzerland). Theory Division
  2. Univ. of Minnesota, Minneapolis, MN (United States). William I. Fine Theoretical Physics Inst. School of Physics and Astronomy
  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 (Greece). Division of Natural Sciences
Publication Date:
Research Org.:
Univ. of Minnesota, Minneapolis, MN (United States); European Organization for Nuclear Research (CERN), Geneva (Switzerland); King's College London (United Kingdom)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); European Research Council (ERC); Science and Technology Facilities Council (STFC) (United Kingdom)
OSTI Identifier:
1437112
Grant/Contract Number:  
SC0011842; 267352; ST/J002798/1
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2015; Journal Issue: 10; Journal ID: ISSN 1475-7516
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; inflation; particle physics; cosmology connection; supersymmetry and cosmology

Citation Formats

Ellis, John, Garcia, Marcos A. G., Nanopoulos, Dimitri V., and Olive, Keith A. Phenomenological aspects of no-scale inflation models. United States: N. p., 2015. Web. doi:10.1088/1475-7516/2015/10/003.
Ellis, John, Garcia, Marcos A. G., Nanopoulos, Dimitri V., & Olive, Keith A. Phenomenological aspects of no-scale inflation models. United States. doi:10.1088/1475-7516/2015/10/003.
Ellis, John, Garcia, Marcos A. G., Nanopoulos, Dimitri V., and Olive, Keith A. Thu . "Phenomenological aspects of no-scale inflation models". United States. doi:10.1088/1475-7516/2015/10/003. https://www.osti.gov/servlets/purl/1437112.
@article{osti_1437112,
title = {Phenomenological aspects of no-scale inflation models},
author = {Ellis, John and Garcia, Marcos A. G. and Nanopoulos, Dimitri V. and Olive, Keith A.},
abstractNote = {We discuss phenomenological aspects of inflationary models wiith a no-scale supergravity Kähler potential motivated by compactified string models, in which the inflaton may be identified either as a Kähler modulus or an untwisted matter field, focusing on models that make predictions for the scalar spectral index ns and the tensor-to-scalar ratio r that are similar to the Starobinsky model. We discuss possible patterns of soft supersymmetry breaking, exhibiting examples of the pure no-scale type m0 = B0 = A0 = 0, of the CMSSM type with universal A0 and m0 ≠ 0 at a high scale, and of the mSUGRA type with A0 = B0 + m0 boundary conditions at the high input scale. These may be combined with a non-trivial gauge kinetic function that generates gaugino masses m1/2 ≠ 0, or one may have a pure gravity mediation scenario where trilinear terms and gaugino masses are generated through anomalies. We also discuss inflaton decays and reheating, showing possible decay channels for the inflaton when it is either an untwisted matter field or a Kähler modulus. Reheating is very efficient if a matter field inflaton is directly coupled to MSSM fields, and both candidates lead to sufficient reheating in the presence of a non-trivial gauge kinetic function.},
doi = {10.1088/1475-7516/2015/10/003},
journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 10,
volume = 2015,
place = {United States},
year = {2015},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 15 works
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Figures / Tables:

Figure 1 Figure 1: Projections of the effective inflationary potential for the model with the stabilised Kähler potential and the T-dependent superpotential ∆W = µ(T + 1/2)p, for different values of p, and c = 1/2. Here T is stabilized at T = 1/2 with Λ−2 = 10, and we use themore » nominal values m = 10−5, µ = 10−13. Left: the potential along the canonically-normalized real direction, x = $\sqrt{6}$tanh−11/$\sqrt{3}$). Right: the cosmological constant as a function of p.« less

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    Works referencing / citing this record:

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      Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.