Effective theory for universal seesaw model and FCNC

TL;DR

This paper develops an effective theory for the universal seesaw model with vector-like quarks, analyzing flavor-changing neutral currents involving top quarks within a specific gauge symmetry framework.

Contribution

It derives the effective theory after integrating out heavy vector-like quarks and explores FCNC effects for top quarks in this model.

Findings

Effective theory with four up-type and three down-type quarks derived.

FCNC interactions of Z boson for top and top' quarks explicitly calculated.

Insights into flavor physics within the universal seesaw framework.

Abstract

We study the quark sector of the universal seesaw model with SU(2)$_L$ $\times$ SU(2)$_R$ $\times$ $U(1)$.The model incorporates the seesaw mechanism with the vector-like quarks (VLQs). The purpose of this work is to study the model with the effective theory. After integrating the heavy five VLQs, we derive the effective theory with four up-type quark and three down type quark. In this work, the FCNC of Z boson for top quark and top$^\prime$ quark is derived.