English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We consider Tsallis cosmology as an approach to thermodynamic gravity andderive the bound on the Tsallis parameter to be $\beta<2$ by using theconstraints derived from the formation of the primordial light elements,Helium, Deuterium and Litium, from the observational data from Big BangNucleosynthesis (BBN) which allows only a very tiny deviation from GeneralRelativity (GR). Next we consider thermal dark matter (DM) freeze-out mechanismin Tsallis cosmological era and derive bounds on the Tsallis parameter from theobserved DM relic abundance to be $1-\beta < 10^{-5}$.

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