Non-perturbative Unitarity of Gravitational Higgs Mechanism

Details Non-perturbative Unitarity of Gravitational Higgs Mechanism Non-perturbative Unitarity of Gravitational Higgs Mechanism

2011-02-24

arxiv.org/abs/1102.4991v3

Phys.Rev.D84 (2011) 084005

Physics

High Energy Physics

High Energy Physics - Theory

15 pages, Phys. Rev. D version

Scientific paper

10.1103/PhysRevD.84.084005

In this paper we discuss massive gravity in Minkowski space via gravitational Higgs mechanism, which provides a non-perturbative definition thereof. Using this non-perturbative definition, we address the issue of unitarity by studying the full nonlinear Hamiltonian for the relevant metric degrees of freedom. While perturbatively unitarity is not evident, we argue that no negative norm state is present in the full nonlinear theory.

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