SO(3) massive gravity

May 9, 2013
6 pages
Published in:
  • Phys.Lett.B 727 (2013) 31-36
  • Published: Nov 25, 2013
e-Print:

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Abstract: (Elsevier)
In this Letter, we propose a massive gravity theory with 5 degrees of freedom. The mass term is constructed by 3 Stückelberg scalar fields, which respects SO(3) symmetry in the fieldsʼ 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.
Note:
  • 5 pages, 1 figure, V2: some typos corrected, remove some remarks about sound speed; V3: add some comments about Minkowskian solution, and more references; V4: published version
  • gravitation: massive
  • tachyon: stability
  • symmetry: SO(3)
  • ghost