A string-inspired running-vacuum-model of cosmology, primordial-black-hole dark matter, and the current tensions in cosmological data

2023/06/13 by Nick E. Mavromatos, Mavromatos, Nick E. · 1 citation
Physics and Astronomy · Computer Science · #Cosmology and Gravitation Theories #Computational Physics and Python Applications #Black Holes and Theoretical Physics

paper · pdf · doi:10.48550/arxiv.2306.08064

Abstract

I review a cosmological model based on string-inspired gravity with anomalies and torsion, which leads to a cosmology of running-vacuum-model (RVM) type. It is argued that such a model can lead to observable, in principle, deviations from the standard ΛCDM paradigm of cosmology at late (modern) eras of the Universe evolution, contributing to an alleviation of the currently observed cosmological H₀ and structure-growth tensions, but also to a potential enhancement of the density of primordial black holes produced during inflation. The latter can thus play a role as dark matter components, and leave observable imprints in gravitational-wave patterns during the radiation-dominance era of the Universe.

Cited by

• Analytical Study for Primordial Non-Gaussianity in the gravity 4D Einstein-scalar-Gauss-Bonnet Inflation

Related

• Gravitational anomalies, axions and a string-inspired running vacuum model in Cosmology
• Going beyond the Standard paradigm of Cosmology: Torsion, gravitational anomalies and inflation without inflaton fields
• String-inspired running-vacuum cosmology, quantum corrections and the current cosmological tensions
• Running Vacuum in the Universe: current phenomenological status
• Implications of Dynamical Dark Energy in the expansion of the Universe and the Structure Formation