Double Higgs mechanisms, supermassive stable particles and the vacuum energy

Abstract

In the present work, a hidden scenario which cast a long-lived superheavy particle [Formula: see text] and simultaneously an extremely light particle [Formula: see text] with mass [Formula: see text] eV is presented. The potential energy [Formula: see text] of the particle [Formula: see text] models the vacuum energy density of the universe [Formula: see text]. On the other hand, the [Formula: see text] particle may act as superheavy dark matter at present times and the products of its decay may be observed in high energy cosmic ray events. The hidden sector proposed here include light fermions with masses near the neutrino mass [Formula: see text] eV and superheavy ones with masses of the order of the GUT scale, interacting through a hidden SU(2)L interaction which also affects the ordinary sector. The construction of such combined scenario is nontrivial since the presence of light particles may spoil the stability of the heavy particle [Formula: see text]. However, double Higgs mechanisms may be helpful for overcoming this problem. In this context, the stability of the superheavy particle [Formula: see text] is ensured due to chiral symmetry arguments elaborated in the text.