A solution to the baryon-DM coincidence problem in the CMSSM with a 126-GeV Higgs boson

TL;DR

This paper proposes a solution to the baryon-dark matter coincidence problem within the CMSSM framework, utilizing late-time decay of Q-balls formed after Affleck-Dine baryogenesis, consistent with a 126-GeV Higgs.

Contribution

It introduces a novel mechanism linking baryon and dark matter production through Q-ball decay in the CMSSM, aligning with Higgs mass observations.

Findings

The baryon-DM coincidence is explained by Q-ball decay in CMSSM.

A specific relation between scalar and gaugino masses is identified.

Results are consistent with the observed 126-GeV Higgs boson.

Abstract

We show that the baryon-dark matter coincidence problem is solved in the CMSSM. The baryons and dark matter are generated simultaneously through the late-time decay of non-topological solitons, Q-balls, which are formed after the Affleck-Dine baryogenesis. A certain relation between the universal scalar mass, $m_0$, and the universal gaugino mass, $M_{1/2}$, is required to solve the coincidence problem, marginally depending on the other CMSSM parameters, and the result is consistent with the observation of the 126-GeV Higgs boson.