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.
Highlights
Our Universe shows a surprising coincidence: the mass densities of its matter components, baryonic matter and dark matter (DM), are eerily similar down to a factor of four or so
The dark matter abundance can be set by any number of mechanisms— freeze-out, freeze-in, misalignment, number asymmetry
This work laid out the possibility of primordial plasma kicking the Goldstone boson of a Standard Model (SM)-preserved global symmetry as a mechanism to produce dark matter density
Summary
Our Universe shows a surprising coincidence: the mass densities of its matter components, baryonic matter and dark matter (DM), are eerily similar down to a factor of four or so This is odd because their abundance seems to be set by different, often unrelated, mechanisms. This work will study a possible connection between asymmetry generation and dark matter production. This interplay has already been explored in the literature: the initial ideas were discussed in the 90s [1,2,3] and many more were published during a resurgence of this topic about a decade or two later, amongst those were [4,5,6,7,8,9].
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