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Exact solution to the "auxiliary extra-dimension" model of massive gravity
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
2011 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 702, no 1, 90-93 p.Article in journal (Refereed) Published
Abstract [en]

The auxiliary extra-dimension model was proposed in order to provide a geometrical interpretation to modifications of general relativity, in particular to non-linear massive gravity. In this context, the theory was shown to be ghost free to third order in perturbations, in the decoupling limit. In this work, we exactly solve the equation of motion in the extra dimension, to obtain a purely 4-dimensional theory. Using this solution, it is shown that the ghost appears at the fourth order and beyond. We explore potential modifications to address the ghost issue and find that their consistent implementation requires going beyond the present framework.

Place, publisher, year, edition, pages
2011. Vol. 702, no 1, 90-93 p.
Keyword [en]
Massive gravity
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:su:diva-68285DOI: 10.1016/j.physletb.2011.06.056ISI: 000294142600016OAI: oai:DiVA.org:su-68285DiVA: diva2:477984
Note
authorCount :2Available from: 2012-01-15 Created: 2012-01-03 Last updated: 2017-12-08Bibliographically approved

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Rosen, Rachel A.
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