TY - JOUR

T1 - Lorentz-violating massive gauge and gravitational fields

AU - Gabadadze, Gregory

AU - Grisa, Luca

N1 - Funding Information:
We would like to thank Gia Dvali, Massimo Porrati, Matthew Schwartz and Dan Zwanziger for useful discussions. The work of G.G. is partially supported by the NSF. L.G. is supported by Physics Department Graduate Student Fellowship at NYU.

PY - 2005/6/23

Y1 - 2005/6/23

N2 - We study nonlinear dynamics in models of Lorentz-violating massive gravity. The Boulware-Deser instability restricts severely the class of acceptable theories. We identify a model that is stable. It exhibits the following bizarre but interesting property: there are only two massive propagating degrees of freedom in the spectrum, and yet long-range instantaneous interactions are present in the theory. We discuss this property on a simpler example of a photon with a Lorentz-violating mass term where the issues of (a)causality are easier to understand. Depending on the values of the mass parameter these models can either be excluded, or become phenomenologically interesting. We discuss a similar example with more degrees of freedom, as well as a model without the long-range instantaneous interactions.

AB - We study nonlinear dynamics in models of Lorentz-violating massive gravity. The Boulware-Deser instability restricts severely the class of acceptable theories. We identify a model that is stable. It exhibits the following bizarre but interesting property: there are only two massive propagating degrees of freedom in the spectrum, and yet long-range instantaneous interactions are present in the theory. We discuss this property on a simpler example of a photon with a Lorentz-violating mass term where the issues of (a)causality are easier to understand. Depending on the values of the mass parameter these models can either be excluded, or become phenomenologically interesting. We discuss a similar example with more degrees of freedom, as well as a model without the long-range instantaneous interactions.

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U2 - 10.1016/j.physletb.2005.04.064

DO - 10.1016/j.physletb.2005.04.064

M3 - Article

AN - SCOPUS:20144383248

VL - 617

SP - 124

EP - 132

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

IS - 1-2

ER -