Kick-alignment: matter asymmetry sourced dark matter

TL;DR

This paper proposes a novel mechanism where a Goldstone field's kick during baryon/lepton asymmetry generation can produce dark matter, linking matter asymmetry to dark matter abundance with specific parameter constraints.

Contribution

It introduces a new dynamical mechanism for dark matter production via matter asymmetry, connecting baryogenesis and dark matter relic abundance through Goldstone field dynamics.

Findings

Viable dark matter mass range of 10 MeV to 1 GeV identified.

Parameter space with decay constant f between 10^{10} and 10^{12} GeV is promising.

Mechanism links matter asymmetry generation to dark matter relic abundance.

Abstract

We investigate the possibility that the dark matter abundance is sourced by the baryon/lepton asymmetry of the early Universe. It turns out that a Goldstone field of a local classically preserved symmetry in the Standard Model experiences a kick during a period of baryon/lepton number generation. This mechanism can be regarded as dynamical generation of initial conditions for misalignment yet the prediction for relic abundance presents an inverse dependence on the coupling in parallel with freeze-in vs freeze-out. We explore two realizations of this mechanism and show that in conjunction with leptogenesis, it is possible to identify a viable promising region of parameter space for dark matter production with mass 10 MeV - 1 GeV and decay constant f in the range of $10^{10} - 10^{12}$ GeV.