We propose a Nieh-Yan extension of f(R) models in the presence of Immirzi field and the resulting theory is studied in the context of first-order formalism. We claim in our model that the ambiguities related to the Palatini approach are solved, allowing us to fully solve the theory in terms of the Immirzi field. In particular, we analyze within such a theoretical framework the propagation of gravitational waves in vacuum, and we outline that a dynamical Immirzi field could be regarded as a propagating torsion field with nontrivial and detectable effects on standard gravitational polarizations. © 2018 American Physical Society.
f(R) gravity with torsion and the Immirzi field: Signature for gravitational wave detection
Montani, G.
2018-01-01
Abstract
We propose a Nieh-Yan extension of f(R) models in the presence of Immirzi field and the resulting theory is studied in the context of first-order formalism. We claim in our model that the ambiguities related to the Palatini approach are solved, allowing us to fully solve the theory in terms of the Immirzi field. In particular, we analyze within such a theoretical framework the propagation of gravitational waves in vacuum, and we outline that a dynamical Immirzi field could be regarded as a propagating torsion field with nontrivial and detectable effects on standard gravitational polarizations. © 2018 American Physical Society.File in questo prodotto:
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