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Cosmological perturbations in massive gravity with doubly coupled matter
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
Number of Authors: 32015 (English)In: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, E-ISSN 1475-7516, no 2, article id 022Article in journal (Refereed) Published
Abstract [en]

We investigate the cosmological perturbations around FLRW solutions to nonlinear massive gravity with a new effective coupling to matter proposed recently. Unlike the case with minimal matter coupling, all five degrees of freedom in the gravity sector propagate on generic self-accelerating FLRW backgrounds. We study the stability of the cosmological solutions and put constraints on the parameters of the theory by demanding the correct sign for the kinetic terms for scalar, vector and tensor perturbations.

Place, publisher, year, edition, pages
2015. no 2, article id 022
Keywords [en]
modified gravity, cosmological perturbation theory, gravity
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-159601DOI: 10.1088/1475-7516/2015/02/022ISI: 000351502100023OAI: oai:DiVA.org:su-159601DiVA, id: diva2:1244741
Available from: 2018-09-03 Created: 2018-09-03 Last updated: 2018-09-03Bibliographically approved

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Department of PhysicsThe Oskar Klein Centre for Cosmo Particle Physics (OKC)Nordic Institute for Theoretical Physics (Nordita)
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Journal of Cosmology and Astroparticle Physics
Physical Sciences

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