The Fourth Generation t-prime in Extensions of the Standard Model

TL;DR

This paper investigates the potential signals of a fourth-generation t' quark in various extensions of the Standard Model, highlighting detectable decay modes at the LHC across different theoretical frameworks.

Contribution

It provides a comparative analysis of t' decay channels in models like Randall-Sundrum, two-Higgs doublet models, and MSSM, emphasizing their detectability at the LHC.

Findings

Large t'--> t Z branching ratio in Randall-Sundrum model.

Huge t'--> t H branching ratio in type III two-Higgs doublet model.

Discussion of detection prospects at the LHC.

Abstract

We study the effects of a fourth generation t' quark in various extensions of the standard model. In the Randall-Sundrum model, the decay t'--> t Z has a large branching ratio that could be detected at the Large Hadron Collider (LHC). We also look at the two-Higgs doublet models I, II and III, and note that, in the latter, the branching ratio of t' --> t H, where H is a Higgs scalar or pseudoscalar, is huge and we discuss detection at the LHC. A few comments about the minimal supersymmetric standard model are also included.