Bosonic-Seesaw Portal Dark Matter
Hiroyuki Ishida, Shinya Matsuzaki, Yuya Yamaguchi

TL;DR
This paper introduces the bosonic-seesaw portal mechanism for non-thermal dark matter production, linking electroweak symmetry breaking with composite baryonic dark matter generated by new strong dynamics.
Contribution
It proposes a novel non-thermal dark matter production mechanism via the bosonic-seesaw portal, connecting electroweak symmetry breaking with composite baryonic dark matter.
Findings
HC baryons can be stable dark matter candidates.
The model allows TeV-scale composite baryonic dark matter.
Dark matter abundance is achieved through non-thermal production below the HC scale.
Abstract
We discuss a new type of Higgs-portal dark matter (DM)-production mechanism, called bosonic-seesaw portal (BSP) scenario. The BS provides the dynamical origin of the electroweak symmetry breaking, triggered by mixing between the elementary Higgs and a composite Higgs generated by a new-color strong dynamics, hypercolor (HC). At the HC strong coupling scale, the classical-scale invariance assumed in the model is dynamically broken as well as the "chiral" symmetry present in the HC sector. In addition to the composite Higgs, HC baryons emerge to potentially be stable because of the unbroken HC baryon number symmetry. Hence the lightest HC baryon can be a DM candidate. Of interest in the present scenario is that HC pions can be as heavy as the HC baryon due to the possibly enhanced-explicit "chiral"-breaking effect triggered after the BS mechanism, so the HC baryon pair cannot annihilate…
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