# Cosmic perturbations, baryon asymmetry and dark matter from the minimal supersymmetric standard model

## TL;DR

This paper explores how scalar fields in the minimal supersymmetric standard model during inflation can generate cosmic perturbations, baryon asymmetry, and dark matter, with specific predictions on non-Gaussianity and isocurvature perturbations.

## Contribution

It proposes a novel scenario where quantum fluctuations of nearly massless phase directions of scalar fields produce cosmic perturbations and baryon asymmetry via Q-ball formation.

## Key findings

- Baryon and dark matter isocurvature perturbations nearly cancel each other.
- Lepton asymmetry significantly exceeds baryon asymmetry.
- Predicts local non-Gaussianity with f_NL = 5/3.

## Abstract

Scalar fields in the minimal supersymmetric standard model may have large field values during inflation. Because of approximate global symmetry, it is plausible that the phase directions of them are nearly massless during inflation and obtain quantum fluctuations, which may be the origin of the cosmic perturbations. If perturbations are produced through Q-ball formation, baryon asymmetry and dark matter can be consistently generated. Significant baryon and dark matter isocurvature perturbations are produced, but they are predicted to nearly compensate each other. The lepton asymmetry is much larger than the baryon asymmetry. The scenario predicts local non-Gaussianity of $f_{\rm NL} = 5/3$. Implication to the mass spectrum of supersymmetric particles is discussed.