Perturbativity and mass scales of Left-Right Higgs bosons

TL;DR

This paper examines the scalar sector of the minimal Left-Right model at TeV scale, focusing on perturbativity, stability, and experimental constraints to refine the allowed mass scales of Higgs bosons.

Contribution

It provides a detailed analysis of the perturbativity and stability limits of the Left-Right Higgs sector, incorporating low-energy constraints to refine mass bounds.

Findings

Lower limits on triplet scalars derived from oblique parameters and decay processes.

Perturbativity constraints sharpen the allowed scale of the Left-Right symmetry.

Current experimental bounds challenge the detectability of certain scalars at the LHC.

Abstract

The scalar sector of the minimal Left-Right model at TeV scale is revisited in light of the large quartic coupling needed for a heavy flavor-changing scalar. The stability and perturbativity of the effective potential is discussed and merged with constraints from low-energy processes. Thus the perturbative level of the Left-Right scale is sharpened. Lower limits on the triplet scalars are also derived: the left-handed triplet is bounded by oblique parameters, while the doubly-charged right-handed component is limited by the $h \to \gamma \gamma, Z \gamma$ decays. Current constraints disfavor their detection as long as $W_R$ is within the reach of the LHC.