Varying constants driven baryogenesis

TL;DR

This paper explores how varying fundamental constants like G, alpha, and c can drive baryogenesis in the early universe, showing that observed baryon asymmetry can be achieved across different models with suitable parameters.

Contribution

It extends the spontaneous baryogenesis framework to models with dynamical scalar fields representing varying constants, analyzing G, alpha, and c variations.

Findings

Achieves observed baryon-to-entropy ratio in multiple varying constants models

Demonstrates parameter ranges for decoupling temperature and cutoff scale

Shows consistency with observational baryon asymmetry across frameworks

Abstract

We study the spontaneous baryogenesis scenario in the early universe for three different frameworks of varying constants theories. We replace the constants by dynamical scalar fields playing the role of thermions. We first obtain the results for baryogenesis driven by the varying gravitational constant, $G$, as in the previous literature, then challenge the problem for varying fine structure constant $\alpha$ models as well as for varying speed of light $c$ models. We show that in each of these frameworks the current observational value of the baryon to entropy ratio, $\eta_B \sim 8.6 \cdot 10^{-11}$, can be obtained for large set of parameters of dynamical constants models as well as the decoupling temperature, and the characteristic cut-off length scale.