Condensed state of heavy vectorlike neutrinos

TL;DR

The paper proposes the existence of stable, dense globules of heavy vectorlike neutrinos formed through Higgs field deformation, potentially contributing to dark matter.

Contribution

It demonstrates the theoretical possibility of stable neutrino globules with high density, expanding understanding of exotic fermionic matter in extensions of the Standard Model.

Findings

Stable neutrino globules can form with densities much higher than electroweak scale.

Deformation of the Higgs field inside globules stabilizes these structures.

Such globules could be a component of dark matter.

Abstract

Some extensions of the Standard Model suggest existence of vectorlike fermions whose mass $M$ can be by up to several orders of magnitude larger than the electroweak scale $v$, and with the Higgs mechanism providing only a small part $m$ of this mass that is a fraction of $v$. It is shown that in a certain range of the parameters $m$ and $M$ there exist stable globules of degenerate fermionic matter made from the lighter of the neutral vectorlike leptons (superheavy neutrinos) with a number density much larger than $m_h \, v^2$, with $m_h$ being the Higgs boson mass. The stability is due to the deformation of the Higgs field inside the globule to values greatly exceeding $v$. The globules are absolutely stable if the lighter of the vectorlike neutrinos is stable and can be (a part of) the dark matter.