Gravitational Wave Imprints of Left-Right Symmetric Model with Minimal Higgs Sector

Abstract

We study the gravitational wave imprints of left-right symmetric model equipped with universal seesaw mechanism allowing for the natural generation of hierarchical masses of the Standard Model fermions. The scalar sector of this model is the minimal one, consisting of only two Higgs doublets. Following the construction of the full thermal potential for this model, we perform a scan of the entire parameter space and identify the region in which the cosmic phase transition associated with the left-right symmetry breaking gives gravitational wave signals detectable by a variety of planned space-based interferometers. Then we also discuss the relevant collider implications of this beyond the Standard Model scenario.

Gravitational wave signatures of a chiral fermion dark matter model

“…The electroweak phase transition within the Standard Model (SM) is not strongly first order [7,8], nor is the QCD phase transition [9,10]; so the detection of primordial GW signals would be an indication of BSM physics. In this backdrop, GWs emerging from electroweak symmetry breaking in extended models and in high scale breaking of new symmetries [33][34][35][36][37][38][39][40] have been analyzed by various authors. The goal of this paper is to analyze such signals in a model with chiral fermion dark matter (DM), which is motivated on the ground that the DM mass cannot take arbitrarily large values, as it arises from the Higgs mechanism.…”