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2018

New Weyl-invariant vector-tensor theory for the cosmological constant

Jiroušek, Pavel, Vikman, Alexander

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We introduce a new Weyl-invariant and generally-covariant vector-tensor theory with higher derivatives.

This theory can be induced by extending the mimetic construction to vector fields of conformal weight four.
We demonstrate that in gauge-invariant variables this novel theory reduces to the Henneaux-Teitelboim description of the unimodular gravity.
Hence, compared with the standard general relativity, our new higher derivative vector-tensor theory has only one new global degree of freedom - the cosmological constant.

New Weyl-invariant vector-tensor theory for the cosmological constant · Around

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