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  Cosmic Expansion in Extended Quasidilaton Massive Gravity

Kahniashvili, T., Kar, A., Lavrelashvili, G. V., Agarwal, N., Heisenberg, L., & Kosowsky, A. (2015). Cosmic Expansion in Extended Quasidilaton Massive Gravity. Physical Review D, 91: 041301. doi:10.1103/PhysRevD.91.041301.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0025-03A2-D Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0025-03A7-3
Genre: Journal Article

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 Creators:
Kahniashvili, Tina, Author
Kar, Arjun, Author
Lavrelashvili, George V.1, Author              
Agarwal, Nishant, Author
Heisenberg, Lavinia, Author
Kosowsky, Arthur, Author
Affiliations:
1Quantum Gravity and Unified Theories, AEI Golm, MPI for Gravitational Physics, Max Planck Society, ou_24014              

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Free keywords: Astrophysics, Cosmology and Extragalactic Astrophysics, astro-ph.CO
 Abstract: Quasidilaton massive gravity offers a physically well-defined gravitational theory with non-zero graviton mass. We present the full set of dynamical equations governing the expansion history of the universe, valid during radiation domination, matter domination, and a late-time self-accelerating epoch related to the graviton mass. The existence of self-consistent solutions constrains the amplitude of the quasi-dilaton field and the graviton mass, as well as other model parameters. We point out that the effective mass of gravitational waves can be significantly larger than the graviton mass, opening the possibility that a single theory can explain both the late-time acceleration of the cosmic expansion and modifications of structure growth leading to the suppression of large-angle correlations observed in the cosmic microwave background.

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 Dates: 2014-12-132015
 Publication Status: Published in print
 Pages: 5 pages, 1 figure
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1412.4300
DOI: 10.1103/PhysRevD.91.041301
 Degree: -

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Title: Physical Review D
  Other : Phys. Rev. D.
Source Genre: Journal
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Publ. Info: Lancaster, Pa. : American Physical Society
Pages: - Volume / Issue: 91 Sequence Number: 041301 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: /journals/resource/111088197762258