Primordial gravitational waves in generalized Palatini gravity

Demir, Durmuş Ali and Gabriel, K. and Kasem, A. and Khalil, S. (2023) Primordial gravitational waves in generalized Palatini gravity. Physics of the Dark Universe, 42 . ISSN 2212-6864

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Extended Palatini gravity is the metric-affine gravity theory characterized by zero torsion, nonzero metricity and a quadratic of the antisymmetric Ricci curvature. It reduces dynamically to general relativity plus a geometric Proca field. In this work, we study imprints of the geometric Proca field on the gravitational waves. Our results show that the geometric Proca leaves significant signatures in the gravitational wave signal, and gravitational wave energy density could be large enough to be detectable by the next upgrade of the existing GW detectors. Our results, if confirmed observationally, will be an indication that the gravity could be non-Riemannian in nature.
Item Type: Article
Uncontrolled Keywords: Early Universe; Palatini gravity; Primodial gravitational waves; Proca field
Divisions: Faculty of Engineering and Natural Sciences
Depositing User: Durmuş Ali Demir
Date Deposited: 02 Feb 2024 14:59
Last Modified: 02 Feb 2024 14:59

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