Hadronic Matter in the Robertson-Walker Metric and the Early Universe

TL;DR

This paper derives and analyzes the Friedman equations for hadronic matter in the early Universe's Robertson-Walker metric, focusing on the hadronic phase from 10^{-6}s to 1s, providing insights into its behavior during this epoch.

Contribution

It presents the first derivation of Friedman equations specifically for hadronic matter in the early Universe's Robertson-Walker metric, including an approximate analytical solution.

Findings

Derived the Friedman equations for hadronic matter in the early Universe.

Analyzed the behavior of hadronic matter during the epoch from 10^{-6}s to 1s.

Provided an approximate analytical solution to the equations.

Abstract

In this work, the Friedman equations for hadronic matter in the Robertson-Walker metric in the early Universe are obtained. We consider the hadronic phase, formed after the hadronization of the quark-gluon plasma, that means times from 10^{-6}s to 1s. The set of equations is derived and the behavior of the system is studied considering one approximate analytical solution.