Ameliorating the Higgs mass fine-tuning problem with multi-Higgs doublet models

TL;DR

This paper explores how multi-Higgs doublet models can address the Higgs mass fine-tuning problem, especially given the lack of new physics signals at the LHC, by examining extended scalar sectors that mimic the Standard Model Higgs.

Contribution

It investigates the potential of two and three Higgs doublet models to reduce Higgs mass fine-tuning without relying on supersymmetry or extra dimensions.

Findings

Multi-Higgs models can provide cancellations in quadratic divergences.

Extended scalar sectors can mimic Standard Model Higgs properties.

Potential for naturalness in non-supersymmetric frameworks.

Abstract

With no conclusive signal till date of the minimal supersymmetric and extra dimensional models at the Large Hadron Collider (LHC), the issue of fine-tuning of the Higgs mass still calls for some attention. It could be very possible that the observed Higgs boson of mass 125 GeV has its origin in a non-supersymmetric extended scalar sector, and, it still has properties strikingly similar to the Standard Model Higgs. In such cases, however, one relies upon possible cancellations in the quadratic divergence of the Higgs mass to uphold naturalness. In this work, we have investigated this possibility in context of some two Higgs doublet and three Higgs doublet scenarios.