It is a general belief that the only possible way to consistently deform the Pauli-Fierz action, also changing the gauge algebra, is general relativity. Here we show that a different type of deformation exists in three dimensions if one allows for PT non-invariant terms. The new gauge algebra is different from that of diffeomorphisms. Furthermore, this deformation can be generalized to the case of a collection of massless spin-2 fields. In this case it describes a consistent interaction among them.
An exotic theory of massless spin-two fields in three dimensions
GUALTIERI, Leonardo
2001-01-01
Abstract
It is a general belief that the only possible way to consistently deform the Pauli-Fierz action, also changing the gauge algebra, is general relativity. Here we show that a different type of deformation exists in three dimensions if one allows for PT non-invariant terms. The new gauge algebra is different from that of diffeomorphisms. Furthermore, this deformation can be generalized to the case of a collection of massless spin-2 fields. In this case it describes a consistent interaction among them.File in questo prodotto:
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