Heavy Quark Decays in the Bilepton Model

TL;DR

This paper explores heavy quark decays involving bileptons in a 331 model, demonstrating potential observability at future 100 TeV colliders but not at the LHC, thus providing a new avenue for beyond Standard Model physics searches.

Contribution

It introduces a novel decay channel involving vector bileptons and exotic quarks in a 331 model, highlighting its detectability at future colliders.

Findings

Signal can be distinguished from Standard Model backgrounds at 100 TeV colliders.

LHC lacks sufficient sensitivity to detect the predicted signal.

Benchmark scenario complies with current experimental constraints.

Abstract

Given the current absence of new physics signals at the LHC, it is increasingly important to investigate alternative scenarios beyond those commonly explored. In this work, we study a variant of the 331 model that predicts the existence of vector bileptons with electric charge and lepton number +/-2, as well as TeV-scale exotic quarks carrying charges +/- 5/3 and +/- 4/3. Specifically, we focus on the primary production of heavy quarks with charge +/- 5/3, which decay into a bottom quark and a bilepton, followed by the bilepton's decay into same-sign muon pairs. As a case study, we select a benchmark point that complies with current experimental exclusion limits and theoretical expectations for the bilepton mass. Our analysis shows that the resulting signal stands out clearly from Standard Model backgrounds and could be observed at a future 100 TeV hadron collider such as FCC-hh. In contrast, the LHC, even in its high-luminosity phase, lacks the sensitivity required to detect this signal.