Interplay of vector-like top partner multiplets in a realistic mixing set-up

TL;DR

This paper investigates the combined effects of two vector-like top partner multiplets on electroweak precision tests, flavor constraints, and collider phenomenology, providing insights into more realistic extensions of the standard model.

Contribution

It analyzes the phenomenological implications of having two vector-like top partners, focusing on their interplay and constraints from current data.

Findings

Constraints from electroweak precision data on two top-like vector-like multiplets.

Impact of multiplet mixing on collider signatures.

Limits on model parameters from flavor and oblique corrections.

Abstract

The ATLAS and CMS collaborations at the LHC have performed analyses on the existing data sets, studying the case of one vector-like fermion or multiplet coupling to the standard model Yukawa sector. In the near future, with more data available, these experimental collaborations will start to investigate more realistic cases. The presence of more than one extra vector-like multiplet is indeed a common situation in many extensions of the standard model. The interplay of these vector-like multiplet between precision electroweak bounds, flavour and collider phenomenology is a important question in view of establishing bounds or for the discovery of physics beyond the standard model. In this work we study the phenomenological consequences of the presence of two vector-like multiplets. We analyse the constraints on such scenarios from tree-level data and oblique corrections for the case of mixing to each of the SM generations. In the present work, we limit to scenarios with two top-like partners and no mixing in the down-sector.