Lepton Number Violating Signals of the Top Partners in the Left-Right Twin Higgs Model

TL;DR

This paper explores unique collider signals of the left-right twin Higgs model, focusing on lepton number violation and same-sign leptons, which could be key to discovering particles responsible for electroweak symmetry breaking.

Contribution

It introduces novel collider signatures involving lepton number violation in the left-right twin Higgs model, especially when right-handed neutrino masses are below gauge boson masses.

Findings

Same-sign leptons without missing energy are a distinctive signature.

These signals have negligible standard model background.

Potential to uniquely identify particles responsible for electroweak symmetry breaking.

Abstract

We study the collider signatures of the left-right twin Higgs model in the case that the right-handed neutrino mass is less than the mass of the right-handed gauge boson. In this scenario, new leptonic decay chains open up, allowing the particles which cancel the one-loop quadratic divergences of the Higgs, the right-handed gauge bosons and top-partners, to be discovered. Half of these events contain same-sign leptons without missing energy, which have no genuine standard model background and for which the backgrounds are purely instrumental. These signals may be used to complement other collider searches, and in certain regions of parameter space, may be the only way to observe the particles responsible for natural electroweak symmetry breaking in the left-right twin Higgs model.