Constraints on quasidilaton massive gravity

Katarina Martinovic; Mairi Sakellariadou

doi:10.1103/PhysRevD.100.124016

Constraints on quasidilaton massive gravity

Katarina Martinovic^*, Mairi Sakellariadou

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

The last decade has seen great advancements in the field of modified gravity, motivated by the dark energy problem, or by the search for a fundamental quantum gravity theory. With a phenomenologically driven analysis, we consider de Rham, Gabadadze and Tolley theory and its extension, quasidilaton massive gravity (QDMG). When looking for ways to constrain the theory, a promising direction appeared to be astrophysical tests. The scalar gravitational degree of freedom and quasidilaton degree of freedom alter the evolution of Bardeen potentials, which in turn affects the galaxy rotation curves. We find an upper bound on graviton mass in QDMG to be m≤10-31 eV. This result agrees with bounds from LIGO and numerous Solar System tests. However, the extremely small mass of the graviton remains a detection out of reach, with LISA's sensitivity exploring the parameter space up to m≤10-25 eV.

Original language	English
Article number	124016
Journal	Physical Review D
Volume	100
Issue number	12
Early online date	5 Dec 2019
DOIs	https://doi.org/10.1103/PhysRevD.100.124016
Publication status	Published - 15 Dec 2019

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Constraints on quasidilaton massive gravity

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