Non-Pauli-Fierz massive gravitons.
We study general Lorentz invariant theories of massive gravitons. We show that, contrary to the standard lore, there exist consistent theories where the graviton mass term violates Pauli-Fierz structure. For theories where the graviton is a resonance, this does not imply the existence of a scalar ghost if the deviation from a Pauli-Fierz structure becomes sufficiently small at high energies. These types of mass terms are required by any consistent realization of the Dvali-Gabadadze-Porrati model in higher dimension.
Dvali
Gia
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CERN, Theory Division, Geneva 23, Switzerland.
Pujolàs
Oriol
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Redi
Michele
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