Fourth Generation t-prime in Extensions of the Standard Model

TL;DR

This paper investigates the phenomenology of a hypothetical fourth-generation t-prime quark within various extensions of the Standard Model, focusing on its decay channels and detectability at the LHC.

Contribution

It provides new predictions for t-prime decay branching ratios in Randall-Sundrum and two-Higgs doublet models, highlighting potential signals for LHC detection.

Findings

Large t-prime -> t Z decay in Randall-Sundrum model.

Huge t-prime -> t H decay in two-Higgs doublet model III.

Potential LHC signatures for fourth-generation quarks.

Abstract

We study the effects of a fourth generation t-prime quark in various extensions of the standard model. In the Randall-Sundrum model, the decay t-prime -> 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-prime -> t H, where H is a Higgs scalar or pseudoscalar, is huge and we discuss detection at the LHC.