Naturalness in testable type II seesaw scenarios

TL;DR

This paper examines the naturalness problem in the type II seesaw model, analyzing how new scalar triplets affect the Higgs mass and identifying testable scenarios compatible with naturalness constraints.

Contribution

It provides a detailed analysis of the naturalness issue in the type II seesaw model, highlighting testable parameter regions with collider and lepton flavor violation prospects.

Findings

Identified testable triplet mass ranges consistent with naturalness.

Analyzed constraints from collider and lepton flavor violation experiments.

Proposed scenarios where the Higgs naturalness criterion is satisfied.

Abstract

New physics coupling to the Higgs sector of the Standard Model can lead to dangerously large corrections to the Higgs mass. We investigate this problem in the type II seesaw model for neutrino mass, where a weak scalar triplet is introduced. The interplay of direct and indirect constraints on the type II seesaw model with its contribution to the Higgs mass is analyzed. The focus lies on testable triplet masses and (sub) eV-scale triplet vacuum expectation values. We identify scenarios that are testable in collider and/or lepton flavor violation experiments, while satisfying the Higgs naturalness criterion.