Electroweak Chiral Lagrangian for a Hypercharge-universal Topcolor Model

TL;DR

This paper develops an electroweak chiral Lagrangian for a hypercharge-universal topcolor model, showing that hypercharge assignments improve model predictions by increasing Z' mass and reducing the T parameter, while the S parameter remains around +1.

Contribution

It introduces a hypercharge-universal topcolor model that enhances previous models by allowing larger Z' masses and better electroweak parameter compatibility.

Findings

Larger Z' mass achievable with hypercharge-universality

T parameter significantly reduced

S parameter remains around +1

Abstract

Electroweak chiral Lagrangian for a hypercharge-universal topcolor model is investigated. We find that the assignments of universal hypercharge improve the results obtained previously from K.Lane's prototype natural TC2 model by allowing a larger Z' mass resulting in a very small T parameter and the S parameter is still around the order of +1