期刊
PHYSICAL REVIEW D
卷 88, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.88.024003
关键词
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资金
- Department of Energy [DE-FG02-12ER41810]
- Government of Canada through Industry Canada
- Province of Ontario through the Ministry of Economic Development and Innovation
- John Templeton Foundation
- NASA [NNX10AH14G]
- U.S. Department of Energy [DE-FG02-11ER41743]
Nonlinear partially massless (PM) gravity, if it exists, is a theory of massive gravity in which the graviton has four propagating degrees of freedom. In PM gravity, a scalar gauge symmetry removes one of the five modes of the massive graviton. This symmetry ties the value of the cosmological constant to the mass of the graviton, which in turn can be kept small in a technically natural way. Thus, PM gravity could offer a compelling solution to the old cosmological constant problem. In this work we look for such a theory among the known ghost-free massive gravity models with a de Sitter reference metric. We find that despite the existence of strong supporting evidence for the existence of a PM theory of gravity, technical obstructions arise which preclude its formulation using the standard massive gravity framework.
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