Antusch, Stefan and Figueroa, Daniel G. and Marschall, Kenneth and Torrenti, Francisco.
(2020)
* Energy distribution and equation of state of the early Universe: matching the end of inflation and the onset of radiation domination.*
Physics Letters B, 811.
p. 135888.

Full text not available from this repository.

Official URL: https://edoc.unibas.ch/80040/

Downloads: Statistics Overview

## Abstract

We study the energy distribution and equation of state of the universe between the end of inflation and the onset of radiation domination (RD), considering observationally consistent single-field inflationary scenarios, with a potential 'flattening' at large field values, and a monomial shape V(phi) proportional to vertical bar phi vertical bar(p) around the origin. As a proxy for (p)reheating, we include a quadratic interaction g(2)phi X-2(2) between the inflaton phi and a light scalar 'daughter' field X, with g(2) > 0. We capture the non-perturbative and non-linear nature of the system dynamics with lattice simulations, obtaining that: i) the final energy transferred to X depends only on p, not on g(2); ii) the final transfer of energy is always negligible for 2 <= p < 4, and of order similar to 50% for p >= 4; iii) the system goes at late times to matter-domination for p = 2, and always to RD for p > 2. In the latter case we calculate the number of e-folds until RD, significantly reducing the uncertainty in the inflationary observables Tl-s and r.

Faculties and Departments: | 05 Faculty of Science > Departement Physik > Physik > Theoretische Physik (Antusch) |
---|---|

UniBasel Contributors: | Antusch, Stefan and Marschall, Kenneth and Torrenti, Francisco |

Item Type: | Article, refereed |

Article Subtype: | Research Article |

Publisher: | Elsevier |

ISSN: | 0370-2693 |

e-ISSN: | 1873-2445 |

Note: | Publication type according to Uni Basel Research Database: Journal article |

Identification Number: | |

Last Modified: | 04 May 2021 13:49 |

Deposited On: | 04 May 2021 13:49 |

Repository Staff Only: item control page