Constraints on Tsallis Cosmology from Big Bang Nucleosynthesis and Dark Matter Freeze-out

2021/04/22 by Ghoshal, Anish, Lambiase, Gaetano · 2 citations
#Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2104.11296

Abstract

We consider Tsallis cosmology as an approach to thermodynamic gravity and derive the bound on the Tsallis parameter to be β<2 by using the constraints derived from the formation of the primordial light elements, Helium, Deuterium and Litium, from the observational data from Big Bang Nucleosynthesis (BBN) which allows only a very tiny deviation from General Relativity (GR). Next we consider thermal dark matter (DM) freeze-out mechanism in Tsallis cosmological era and derive bounds on the Tsallis parameter from the observed DM relic abundance to be 1-β< 10^-5.

Cited by

• Constraining Zero-Point Length from Gravitational Baryogenesis
• Constraints on Rényi Entropy through Primordial Big-Bang Nucleosynthesis and Baryogenesis

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