Primordial gravitational waves in generalized Palatini gravity

被引：0
|
作者：
Demir, D. [1 ]
Gabriel, K. [2 ,3 ]
Kasem, A. [3 ]
Khalil, S. [3 ]
机构：
[1] Sabanci Univ, Fac Engn & Nat Sci, TR-34956 Tuzla, Istanbul, Turkiye
[2] Cairo Univ, Fac Sci, Dept Phys, Giza 12613, Egypt
[3] Zewail City Sci & Technol, Ctr Fundamental Phys, 6th October City 12578, Giza, Egypt
来源：
PHYSICS OF THE DARK UNIVERSE | 2023年 / 42卷
关键词：
Palatini gravity; Proca field; Primodial gravitational waves; Early Universe; INFLATION;
D O I：
10.1016/j.dark.2023.101336
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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.
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页数：6
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