Scalar-connection gravity and spontaneous scalarization

Hemza Azri, Salah Nasri

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Scalar-tensor theories of gravity are known to allow significant deviations from general relativity through various astrophysical phenomena. In this paper, we formulate a scalar-connection gravity by setting up scalars and connection configurations instead of metric. Since the matter sector is not straightforward to conceive without a metric, we invoke cosmological fluids in terms of their one-form velocity in the volume element of the invariant action. This leads to gravitational equations with a perfect fluid source and a generated metric, which are expected to produce reasonable deviations from general relativity in the strong field regime. As a relevant application, we study a spontaneous scalarization mechanism and show that the Damour-Esposito-Farèse model arises in a certain class of scalar-connection gravity. Furthermore, we investigate a general study in which the present framework becomes distinguishable from the famed scalar-tensor theories.

Original languageEnglish
Article number024035
JournalPhysical Review D
Issue number2
Publication statusPublished - Jan 20 2021

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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