Scalegenesis via dynamically induced multiple seesaws

TL;DR

This paper introduces a scalegenesis model where dynamical strong interactions trigger simultaneous electroweak symmetry breaking, neutrino mass generation, and dark matter stability, linking these phenomena through a new hypercolor sector.

Contribution

It presents a novel dynamical mechanism for scale generation and symmetry breaking via hypercolor-induced bosonic seesaw mechanisms, unifying mass origins in a weakly coupled gauge framework.

Findings

Hypercolor sector triggers simultaneous EWSB and B-L symmetry breaking.

A stable hypercolor baryon serves as a dark matter candidate with TeV-scale mass.

Dark matter relic abundance can be explained via bosonic-seesaw portal processes.

Abstract

We propose a model which accounts for the dynamical origin of the electroweak symmetry breaking (EWSB), directly linking to the mass generation of dark matter (DM) candidate and active neutrinos. The standard model (SM) is weakly charged under the $U(1)_{\rm B-L}$ gauge symmetry, in conjunction with newly introduced three right-handed Majorana neutrinos and the $U(1)_{\rm B-L}$ Higgs. The model is built on the classical scale invariance, that is dynamically broken by a new strongly coupled sector, what is called the hypercolor (HC) sector, which is also weakly coupled to the $U(1)_{\rm B-L}$ gauge. At the HC strong scale, the simultaneous breaking of the EW and $U(1)_{\rm B-L}$ gauge symmetries is triggered by dynamically induced multiple seesaw mechanisms, namely bosonic seesaw mechanisms. Thus, all the origins of masses are provided singly by the HC dynamics: that is what we call the dynamical scalegenesis. We also find that an HC baryon, with mass on the order of a few TeV, can be stabilized by the HC baryon number and the $U(1)_{\rm B-L}$ charge, so identified as a DM candidate. The relic abundance of the HC-baryon DM can be produced dominantly via the bosonic-seesaw portal process, and the HC-baryon DM can be measured through the large magnetic moment coupling generated from the HC dynamics, or the $U(1)_{\rm B-L}$-gauge boson portal in direct detection experiments.