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Calculations of Inflaton Decays and Reheating: with Applications to No-Scale Inflation Models

We discuss inflaton decays and reheating in no-scale Starobinsky-like models of inflation, calculating the effective equation-of-state parameter, $w$, during the epoch of inflaton decay, the reheating temperature, $T_{\rm reh}$, and the number of inflationary e-folds, $N_*$, comparing analytical app...

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Detalles Bibliográficos
Autores principales: Ellis, John, Garcia, Marcos A. G., Nanopoulos, Dimitri V., Olive, Keith A.
Lenguaje:eng
Publicado: 2015
Materias:
Acceso en línea:https://dx.doi.org/10.1088/1475-7516/2015/07/050
http://cds.cern.ch/record/2019444
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author Ellis, John
Garcia, Marcos A. G.
Nanopoulos, Dimitri V.
Olive, Keith A.
author_facet Ellis, John
Garcia, Marcos A. G.
Nanopoulos, Dimitri V.
Olive, Keith A.
author_sort Ellis, John
collection CERN
description We discuss inflaton decays and reheating in no-scale Starobinsky-like models of inflation, calculating the effective equation-of-state parameter, $w$, during the epoch of inflaton decay, the reheating temperature, $T_{\rm reh}$, and the number of inflationary e-folds, $N_*$, comparing analytical approximations with numerical calculations. We then illustrate these results with applications to models based on no-scale supergravity and motivated by generic string compactifications, including scenarios where the inflaton is identified as an untwisted-sector matter field with direct Yukawa couplings to MSSM fields, and where the inflaton decays via gravitational-strength interactions. Finally, we use our results to discuss the constraints on these models imposed by present measurements of the scalar spectral index $n_s$ and the tensor-to-scalar perturbation ratio $r$, converting them into constraints on $N_*$, the inflaton decay rate and other parameters of specific no-scale inflationary models.
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institution Organización Europea para la Investigación Nuclear
language eng
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spelling cern-20194442022-08-10T12:59:58Zdoi:10.1088/1475-7516/2015/07/050http://cds.cern.ch/record/2019444engEllis, JohnGarcia, Marcos A. G.Nanopoulos, Dimitri V.Olive, Keith A.Calculations of Inflaton Decays and Reheating: with Applications to No-Scale Inflation ModelsParticle Physics - PhenomenologyWe discuss inflaton decays and reheating in no-scale Starobinsky-like models of inflation, calculating the effective equation-of-state parameter, $w$, during the epoch of inflaton decay, the reheating temperature, $T_{\rm reh}$, and the number of inflationary e-folds, $N_*$, comparing analytical approximations with numerical calculations. We then illustrate these results with applications to models based on no-scale supergravity and motivated by generic string compactifications, including scenarios where the inflaton is identified as an untwisted-sector matter field with direct Yukawa couplings to MSSM fields, and where the inflaton decays via gravitational-strength interactions. Finally, we use our results to discuss the constraints on these models imposed by present measurements of the scalar spectral index $n_s$ and the tensor-to-scalar perturbation ratio $r$, converting them into constraints on $N_*$, the inflaton decay rate and other parameters of specific no-scale inflationary models.We discuss inflaton decays and reheating in no-scale Starobinsky-like models of inflation, calculating the effective equation-of-state parameter, $w$, during the epoch of inflaton decay, the reheating temperature, $T_{\rm reh}$, and the number of inflationary e-folds, $N_*$, comparing analytical approximations with numerical calculations. We then illustrate these results with applications to models based on no-scale supergravity and motivated by generic string compactifications, including scenarios where the inflaton is identified as an untwisted-sector matter field with direct Yukawa couplings to MSSM fields, and where the inflaton decays via gravitational-strength interactions. Finally, we use our results to discuss the constraints on these models imposed by present measurements of the scalar spectral index $n_s$ and the tensor-to-scalar perturbation ratio $r$, converting them into constraints on $N_*$, the inflaton decay rate and other parameters of specific no-scale inflationary models.We discuss inflaton decays and reheating in no-scale Starobinsky-like models of inflation, calculating the effective equation-of-state parameter, w, during the epoch of inflaton decay, the reheating temperature, T(reh), and the number of inflationary e-folds, N(*), comparing analytical approximations with numerical calculations. We then illustrate these results with applications to models based on no-scale supergravity and motivated by generic string compactifications, including scenarios where the inflaton is identified as an untwisted-sector matter field with direct Yukawa couplings to MSSM fields, and where the inflaton decays via gravitational-strength interactions. Finally, we use our results to discuss the constraints on these models imposed by present measurements of the scalar spectral index ns and the tensor-to-scalar perturbation ratio r, converting them into constraints on N(*), the inflaton decay rate and other parameters of specific no-scale inflationary models.KCL-PH-TH-2015-23LCTS-2015-13CERN-PH-TH-2015-122ACT-04-15UMN-TH-3438-15FTPI-MINN-15-26arXiv:1505.06986MI-TH-1513KCL-PH-TH-2015-23LCTS-2015-13CERN-PH-TH-2015-122ACT-04-15MI-TH-1513UMN-TH-3438-15FTPI-MINN-15-26oai:cds.cern.ch:20194442015-05-26
spellingShingle Particle Physics - Phenomenology
Ellis, John
Garcia, Marcos A. G.
Nanopoulos, Dimitri V.
Olive, Keith A.
Calculations of Inflaton Decays and Reheating: with Applications to No-Scale Inflation Models
title Calculations of Inflaton Decays and Reheating: with Applications to No-Scale Inflation Models
title_full Calculations of Inflaton Decays and Reheating: with Applications to No-Scale Inflation Models
title_fullStr Calculations of Inflaton Decays and Reheating: with Applications to No-Scale Inflation Models
title_full_unstemmed Calculations of Inflaton Decays and Reheating: with Applications to No-Scale Inflation Models
title_short Calculations of Inflaton Decays and Reheating: with Applications to No-Scale Inflation Models
title_sort calculations of inflaton decays and reheating: with applications to no-scale inflation models
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1088/1475-7516/2015/07/050
http://cds.cern.ch/record/2019444
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AT olivekeitha calculationsofinflatondecaysandreheatingwithapplicationstonoscaleinflationmodels