Phenomenological aspects of noscale inflation models
Abstract
We discuss phenomenological aspects of inflationary models wiith a noscale 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{sub s} and the tensortoscalar ratio r that are similar to the Starobinsky model. We discuss possible patterns of soft supersymmetry breaking, exhibiting examples of the pure noscale type m{sub 0}=B{sub 0}=A{sub 0}=0, of the CMSSM type with universal A{sub 0} and m{sub 0}≠0 at a high scale, and of the mSUGRA type with A{sub 0}=B{sub 0}+m{sub 0} boundary conditions at the high input scale. These may be combined with a nontrivial gauge kinetic function that generates gaugino masses m{sub 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 MSSM fields, and both candidates lead to sufficient reheating in the presence of a nontrivialmore »
 Authors:
 Theoretical Particle Physics and Cosmology Group, Department of Physics,King’s College London,WC2R 2LS London (United Kingdom)
 (Switzerland)
 William I. Fine Theoretical Physics Institute, School of Physics and Astronomy,University of Minnesota,116 Church Street SE, Minneapolis, MN 55455 (United States)
 George P. and Cynthia W. Mitchell Institute for Fundamental Physics andAstronomy, Texas A&M University,College Station, 77843 Texas (United States)
 (HARC), Mitchell Campus, Woodlands, 77381 Texas (United States)
 (Greece)
 Publication Date:
 Sponsoring Org.:
 SCOAP3, CERN, Geneva (Switzerland)
 OSTI Identifier:
 22458384
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2015; Journal Issue: 10; Other Information: PUBLISHERID: JCAP10(2015)003; OAI: oai:repo.scoap3.org:12066; Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COSMOLOGICAL INFLATION; GRAVITATION; MATTER; POTENTIALS; SCALAR FIELDS; STRING MODELS; SUPERGRAVITY; SUPERSYMMETRY; SYMMETRY BREAKING; TENSOR FIELDS
Citation Formats
Ellis, John, Theory Division, CERN,CH1211 Geneva 23, Garcia, Marcos A.G., Nanopoulos, Dimitri V., Astroparticle Physics Group, Houston Advanced Research Center, Academy of Athens, Division of Natural Sciences, 28 Panepistimiou Avenue, 10679 Athens, and Olive, Keith A. Phenomenological aspects of noscale inflation models. United States: N. p., 2015.
Web. doi:10.1088/14757516/2015/10/003.
Ellis, John, Theory Division, CERN,CH1211 Geneva 23, Garcia, Marcos A.G., Nanopoulos, Dimitri V., Astroparticle Physics Group, Houston Advanced Research Center, Academy of Athens, Division of Natural Sciences, 28 Panepistimiou Avenue, 10679 Athens, & Olive, Keith A. Phenomenological aspects of noscale inflation models. United States. doi:10.1088/14757516/2015/10/003.
Ellis, John, Theory Division, CERN,CH1211 Geneva 23, Garcia, Marcos A.G., Nanopoulos, Dimitri V., Astroparticle Physics Group, Houston Advanced Research Center, Academy of Athens, Division of Natural Sciences, 28 Panepistimiou Avenue, 10679 Athens, and Olive, Keith A. 2015.
"Phenomenological aspects of noscale inflation models". United States.
doi:10.1088/14757516/2015/10/003.
@article{osti_22458384,
title = {Phenomenological aspects of noscale inflation models},
author = {Ellis, John and Theory Division, CERN,CH1211 Geneva 23 and Garcia, Marcos A.G. and Nanopoulos, Dimitri V. and Astroparticle Physics Group, Houston Advanced Research Center and Academy of Athens, Division of Natural Sciences, 28 Panepistimiou Avenue, 10679 Athens and Olive, Keith A.},
abstractNote = {We discuss phenomenological aspects of inflationary models wiith a noscale 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{sub s} and the tensortoscalar ratio r that are similar to the Starobinsky model. We discuss possible patterns of soft supersymmetry breaking, exhibiting examples of the pure noscale type m{sub 0}=B{sub 0}=A{sub 0}=0, of the CMSSM type with universal A{sub 0} and m{sub 0}≠0 at a high scale, and of the mSUGRA type with A{sub 0}=B{sub 0}+m{sub 0} boundary conditions at the high input scale. These may be combined with a nontrivial gauge kinetic function that generates gaugino masses m{sub 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 MSSM fields, and both candidates lead to sufficient reheating in the presence of a nontrivial gauge kinetic function.},
doi = {10.1088/14757516/2015/10/003},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 10,
volume = 2015,
place = {United States},
year = 2015,
month =
}

We discuss phenomenological aspects of inflationary models wiith a noscale 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{sub s} and the tensortoscalar ratio r that are similar to the Starobinsky model. We discuss possible patterns of soft supersymmetry breaking, exhibiting examples of the pure noscale type m{sub 0} = B{sub 0} = A{sub 0} = 0, of the CMSSM type with universal A{sub 0} and m{sub 0} ≠ 0 at a high scale, and of the mSUGRA type withmore »

CONSTRAINTS ON SCALAR AND TENSOR PERTURBATIONS IN PHENOMENOLOGICAL AND TWOFIELD INFLATION MODELS: BAYESIAN EVIDENCES FOR PRIMORDIAL ISOCURVATURE AND TENSOR MODES
We constrain cosmological models where the primordial perturbations have an adiabatic and a (possibly correlated) cold dark matter (CDM) or baryon isocurvature component. We use both a phenomenological approach, where the power spectra of primordial perturbations are parameterized with amplitudes and spectral indices, and a slowroll twofield inflation approach where slowroll parameters are used as primary parameters, determining the spectral indices and the tensortoscalar ratio. In the phenomenological case, with CMB data, the upper limit to the CDM isocurvature fraction is {alpha} < 6.4% at k = 0.002 Mpc{sup 1} and 15.4% at k = 0.01 Mpc{sup 1}. The nonadiabaticmore » 
Models of modular inflation and their phenomenological consequences
We study models of modular inflation of the form expected to arise from low energy effective actions of superstring theories. We argue on general grounds that the most likely models are small field models in which the inflaton moves about a Planck distance from an extremum of the potential. We then explain the generic difficulties in designing small field models of supergravity modular inflation. We show that if the Kaehler potential of the inflaton is logarithmic as in perturbative string theories, then it is not possible to satisfy the slowroll conditions for any superpotential. We find that if the correctionsmore » 
Phenomenological aspects of E/sub 6/ superstringinspired models
The author discusses general problems of superstring  inspired models. These include some results on compactification, first problems for model building, and problems with supersymmetry breaking. A minimal model is described. This description focuses on generalities of the model, radiative breaking of the gauge symmetry, the particle spectrum, Gauginos and Higgs particles, and exotic color triplets (Dparticles). 
Phenomenological Aspects of U(1)' Models
This talk summarizes certain phenomenological aspects of the supersymmetric models with an extra U(1) invariance broken at the TeV scale. The discussions involve the Higgs sector, CP violation, Neutrino masses and the LHC signatures.