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Title: Phenomenological aspects of no-scale inflation models

Journal Article · · Journal of Cosmology and Astroparticle Physics
 [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

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.

Research Organization:
Univ. of Minnesota, Minneapolis, MN (United States); European Organization for Nuclear Research (CERN), Geneva (Switzerland); King's College, London (United Kingdom)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); European Research Council (ERC); Science and Technology Facilities Council (STFC) (United Kingdom)
Grant/Contract Number:
SC0011842; 267352; ST/J002798/1
OSTI ID:
1437112
Journal Information:
Journal of Cosmology and Astroparticle Physics, Vol. 2015, Issue 10; ISSN 1475-7516
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 36 works
Citation information provided by
Web of Science

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Cited By (13)

Cosmological α-attractors and de Sitter landscape journal December 2015
Inflation and leptogenesis in high-scale supersymmetry journal January 2020
Case for an EeV Gravitino journal July 2017
Global fits of GUT-scale SUSY models with GAMBIT journal December 2017
Simple cosmological model with inflation and late times acceleration journal March 2018
Induced-gravity GUT-scale Higgs inflation in supergravity journal June 2018
Generalized dilaton–axion models of inflation, de Sitter vacua and spontaneous SUSY breaking in supergravity journal August 2019
Global fits of GUT-scale SUSY models with GAMBIT text January 2017
Global fits of GUT-scale SUSY models with GAMBIT text January 2017
Radiative Production of Non-thermal Dark Matter text January 2019
Inflation and Leptogenesis in High-Scale Supersymmetry text January 2019
$$\alpha $$-attractors from supersymmetry breaking journal February 2021
Starobinsky Inflation: From Non-SUSY to SUGRA Realizations journal January 2017

Figures / Tables (3)


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