en
Scientific article
Open access
English

On scale-free extensions of massive (bi-)gravity

Published inThe journal of high energy physics, vol. 1702, p. 098-133
Collection
  • Open Access - SCOAP3
Publication date2017
Abstract

We discuss a scale-free model of bigravity, in which the mass parameter of the standard bigravity potential is promoted to a dynamical scalar field. This modification retains the ghost-free bigravity structure, in particular it remains free of the Boulware-Deser ghost. We investigate the theory's interaction structure, focusing on its consistent scaling limits and strong coupling scales. Furthermore we explore the model's quadratic action, both around generic background configurations and paying special attention to cosmological backgrounds and to the associated background evolution. Finally we consider the possibility of realising a phase of late-time acceleration as well as a quasi-de Sitter inflationary stage at early times, when the promoted “mass scalar” becomes the inflaton.

Keywords
  • Classical Theories of Gravity
  • Space-Time Symmetries
Citation (ISO format)
CUSIN, Giulia, KHOSRAVI, Nima, NOLLER, Johannes. On scale-free extensions of massive (bi-)gravity. In: The journal of high energy physics, 2017, vol. 1702, p. 098–133. doi: 10.1007/JHEP02(2017)098
Main files (1)
Article (Published version)
Identifiers
ISSN of the journal1029-8479
1008views
155downloads

Technical informations

Creation03/01/2017 11:34:31 AM
First validation03/01/2017 11:34:31 AM
Update time03/15/2023 1:25:05 AM
Status update03/15/2023 1:25:05 AM
Last indexation02/12/2024 11:27:07 AM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack