Fitting Precision Electroweak Data with Exotic Heavy Quarks

TL;DR

This paper explores how mixing exotic heavy quarks with standard model quarks can improve the fit of precision electroweak data, offering new interpretations of the top quark and addressing discrepancies in LEP and SLC measurements.

Contribution

It introduces a novel approach of incorporating exotic heavy quarks to reconcile discrepancies in precision electroweak data and proposes unconventional top quark interpretations.

Findings

Mixing with exotic quarks improves data fit.

Provides alternative top quark interpretations.

Addresses discrepancies in b and c quark measurements.

Abstract

The 1999 precision electroweak data from LEP and SLC persist in showing some slight discrepancies from the assumed standard model, mostly regarding $b$ and $c$ quarks. We show how their mixing with exotic heavy quarks could result in a more consistent fit of all the data, including two unconventional interpretations of the top quark.