# Relaxation leptogenesis, isocurvature perturbations, and the cosmic infrared background

## TL;DR

This paper proposes that Higgs relaxation leptogenesis can generate small-scale baryonic isocurvature perturbations, explaining the observed excess fluctuations in the cosmic infrared background.

## Contribution

It introduces a novel connection between Higgs relaxation leptogenesis and CIB fluctuations, providing a new explanation for the observed phenomena.

## Key findings

- Higgs relaxation leptogenesis can produce relevant isocurvature perturbations.
- The model explains the excess CIB fluctuations observed.
- Small-scale matter-antimatter asymmetry variations impact star formation.

## Abstract

Observations of cosmic infrared background (CIB) radiation exhibit significant fluctuations on small angular scales. A number of explanations have been put forth, but there is currently no consensus on the origin of these large fluctuations. We consider the possibility that small-scale fluctuations in matter-antimatter asymmetry could lead to variations in star formation rates which are responsible for the CIB fluctuations. We show that the recently proposed Higgs relaxation leptogenesis mechanism can produce such small-scale baryonic isocurvature perturbations which can explain the observed excess in the CIB fluctuations.