Collider phenomenology of new neutral scalars in a flavoured multi-Higgs model

TL;DR

This paper introduces a novel collider signature for heavy neutral scalars in multi-Higgs models, focusing on a specific flavor model and analyzing its discovery potential at the LHC.

Contribution

It proposes a new collider signature involving two leptons and four jets for heavy scalars in multi-Higgs models, with a detailed analysis within a specific BGL-type model.

Findings

Kinematic methods can effectively distinguish the signal from background.

The proposed signature has promising discovery potential at the LHC.

The method is applicable to any multi-Higgs model for heavy scalar searches.

Abstract

In this work, we propose and explore for the first time a new collider signature of heavy neutral scalars typically found in many distinct classes of multi-Higgs models. This signature, particular relevant in the context of the Large Hadron Collider (LHC) measurements, is based on a topology with two charged leptons and four jets arising from first and second generation quarks. As an important benchmark scenario of the multi-Higgs models, we focus on a recently proposed Branco-Grimus-Lavoura (BGL) type model enhanced with an abelian U(1) flavour symmetry and featuring an additional sector of right-handed neutrinos. We discuss how kinematics of the scalar fields in this model can be used to efficiently separate the signal from the dominant backgrounds and explore the discovery potential of the new heavy scalars in the forthcoming LHC runs. The proposed method can be applied for analysis of statistical significance of heavy scalars' production at the LHC and future colliders in any multi-Higgs model.