Publication

Inflaton mass in the nu WSM inflation

2009
Journal Articles

Abstract

We analyze the reheating in the modification of the nu MSM (Standard Model with three right handed neutrinos with masses below the electroweak scale) where one of the sterile neutrinos, which provides the Dark Matter, is generated in decays of the additional inflaton field. We deduce that due to rather inefficient transfer of energy from the inflaton to the Standard Model sector reheating tends to occur at very low temperature, thus providing strict bounds oil the coupling between the inflaton and the Higgs particles. This in turn translates to the bound on the inflaton mass, which appears to be very light 0.1 GeV less than or similar to m(1) less than or similar to 10 GeV, or slightly heavier then two Higgs masses 300 GeV less than or similar to m(1) less than or similar to 1000 GeV. (C) 2008 Published by Elsevier B.V.

Official source

https://infoscience.epfl.ch/entities/publication/439d4b72-71e0-4c09-8d21-ac21d288c11a

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2009
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/439d4b72-71e0-4c09-8d21-ac21d288c11a

About this result

Related concepts (32)

Inflation (cosmology)

In physical cosmology, cosmic inflation, cosmological inflation, or just inflation, is a theory of exponential expansion of space in the early universe. The inflationary epoch is believed to have lasted from seconds to between and seconds after the Big Bang. Following the inflationary period, the universe continued to expand, but at a slower rate. The acceleration of this expansion due to dark energy began after the universe was already over 7.7 billion years old (5.4 billion years ago).

Sterile neutrino

Sterile neutrinos (or inert neutrinos) are hypothetical particles (neutral leptons – neutrinos) that are believed to interact only via gravity and not via any of the other fundamental interactions of the Standard Model. The term sterile neutrino is used to distinguish them from the known, ordinary active neutrinos in the Standard Model, which carry an isospin charge of ± 1/ 2 and engage in the weak interaction. The term typically refers to neutrinos with right-handed chirality (see right-handed neutrino), which may be inserted into the Standard Model.

Higgs boson

The Higgs boson, sometimes called the Higgs particle, is an elementary particle in the Standard Model of particle physics produced by the quantum excitation of the Higgs field, one of the fields in particle physics theory. In the Standard Model, the Higgs particle is a massive scalar boson with zero spin, even (positive) parity, no electric charge, and no colour charge that couples to (interacts with) mass. It is also very unstable, decaying into other particles almost immediately upon generation.

Related publications (31)

Inflaton mass in the nu WSM inflation

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Sterile neutrinos as dark matter

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