Inflaton decay through supergravity effects

  title={Inflaton decay through supergravity effects},
  author={Motoi Endo and Masahiro Kawasaki and Fuminobu Takahashi and Tsutomu. T. Yanagida},
  journal={Physics Letters B},
We point out that supergravity effects enable the inflaton to decay into all matter fields, including the visible and the supersymmetry breaking sectors, once the inflaton acquires a non-vanishing vacuum expectation value. The new decay processes have great impacts on cosmology; the reheating temperature is bounded below; the gravitinos are produced by the inflaton decay in a broad class of the dynamical supersymmetry breaking models. We derive the bounds on the inflaton mass and the vacuum… Expand

Figures from this paper

Inflaton decay in supergravity
We discuss inflaton decay in supergravity, taking account of the gravitational effects. It is shown that, if the inflaton has a nonzero vacuum expectation value, it generically couples to any matterExpand
Anomaly-induced inflaton decay and gravitino-overproduction problem
Abstract We point out that the inflaton spontaneously decays into any gauge bosons and gauginos via the super-Weyl, Kahler and sigma-model anomalies in supergravity, once the inflaton acquires aExpand
The decay of the inflaton in no-scale supergravity
We study the decay of the inflaton in no-scale supergravity and show that decay due to the gravitational interactions through supergravity effects is highly suppressed relative to the case in minimalExpand
Eluding the gravitino overproduction in inflaton decay
Abstract It is known that gravitinos are non-thermally produced in inflaton decay processes, which excludes many inflation models for a wide range of the gravitino mass. We find that the constraintsExpand
Gravitino problem in supergravity chaotic inflation and SUSY breaking scale after BICEP2
Abstract Gravitinos are generically produced by inflaton decays, which place tight constraints on inflation models as well as supersymmetry breaking scale. We revisit the gravitino production fromExpand
PeV-scale supersymmetry from new inflation
We show that heavy supersymmetric particles around O(100) TeV to O(1) PeV naturally appear in new inflation in which the Higgs boson responsible for the breaking of U(1)B?L plays the role ofExpand
Alchemical Inflation: inflaton turns into Higgs
We propose a new inflation model in which a gauge singlet inflaton turns into the Higgs condensate after inflation. The inflationary path is characterized by a moduli space of supersymmetric vacuaExpand
Hybrid inflation in high-scale supersymmetry
A bstractIn hybrid inflation, the inflaton generically has a tadpole due to gravitational effects in supergravity, which significantly changes the inflaton dynamics in high-scale supersymmetry. WeExpand
R-symmetric axion/natural inflation in supergravity via deformed moduli dynamics
Abstract We construct a natural inflation model in supergravity where the inflaton is identified with a modulus field possessing a shift symmetry. The superpotential for the inflaton is generated byExpand
R-invariant new inflation model versus supersymmetric standard model
We revisit the implications of the R-invariant new inflation model to the supersymmetric standard model in light of recent discussion of gravitino production processes by the decay of the inflatonExpand


Moduli/inflaton mixing with supersymmetry-breaking field
A heavy scalar field such as moduli or an inflaton generally mixes with a field responsible for the supersymmetry breaking. We study the scalar decay into the standard model particles and theirExpand
Gravitino overproduction in inflaton decay
Abstract Most of the inflation models end up with non-vanishing vacuum expectation values of the inflaton fields ϕ in the true vacuum, which induce, in general, non-vanishing auxiliary field G ϕ forExpand
Leptogenesis in inflaton decay
Abstract We study a leptogenesis via decays of heavy Majorana neutrinos produced non-thermally in inflaton decays. We find that this scenario is fully consistent with existing supersymmetricExpand
Moduli decays and gravitinos
One proposed solution of the moduli problem of string cosmology requires that the moduli are quite heavy, their decays reheating the Universe to temperatures above the scale of nucleosynthesis. InExpand
Anomaly mediation in supergravity theories
We consider the effects of anomalies on the supersymmetry-breaking parameters in supergravity theories. We construct a supersymmetric expression for the anomaly-induced terms in the 1PI effectiveExpand
Flat Potential for Inflaton with a Discrete R-Invariance in Supergravity
We show that a very flat potential of inflaton required for a sufficient inflation is naturally obtained in $N=1$ supergravity by imposing a discrete $R$-invariance $Z_{n}$. Several cosmologicalExpand
The Polonyi problem and upper bound on inflation scale in supergravity
Abstract We reconsider the Polonyi problem in gravity-mediation models for supersymmetry (SUSY) breaking. It has been argued that there is no problem in the dynamical SUSY breaking scenarios, sinceExpand
Natural chaotic inflation in supergravity
It is shown that chaotic inflation naturally takes place by introducing a small breaking term of the shift symmetry in the superpotential. Expand
Thermal production of gravitinos
Abstract We evaluate the gravitino production rate in supersymmetric QCD at high temperature to leading order in the gauge coupling. The result, which is obtained by using the resummed gluonExpand
Cosmic string from D-term inflation and curvaton
Abstract We study effects of the cosmic string in the D -term inflation model on the cosmic microwave background (CMB) anisotropy. In the D -term inflation model, gauged cosmic string is usuallyExpand