Journal
PHYSICS LETTERS B
Volume 727, Issue 1-3, Pages 31-36Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2013.10.031
Keywords
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Funding
- World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan
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In this Letter, we propose a massive gravity theory with 5 degrees of freedom. The mass term is constructed by 3 Stiickelberg scalar fields, which respects SO(3) symmetry in the fields' configuration. By the analysis on the linear cosmological perturbations, we found that such 5 d.o.f. are free from ghost instability, gradient instability, and tachyonic instability. (C) 2013 Elsevier B.V. All rights reserved.
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