Oblique corrections from triplet quarks

TL;DR

This paper derives general formulas for oblique correction parameters in extended Standard Model scenarios with multiple types of quarks, including triplet quarks with various electric charges, accounting for their mixing with standard quarks.

Contribution

It provides comprehensive formulas for oblique parameters in models with arbitrary numbers of singlet, doublet, and triplet quarks, expanding the theoretical tools for precision electroweak tests.

Findings

Formulas for $S$, $T$, $U$, $V$, $W$, and $X$ parameters derived

Applicable to models with multiple quark representations and mixings

Facilitates testing of extended quark sector models against electroweak data

Abstract

We present general formulas for the oblique-correction parameters $S$, $T$, $U$, $V$, $W$, and $X$ in an extension of the Standard Model having arbitrary numbers of singlet, doublet, and triplet quarks with electric charges $-4/3$, $-1/3$, $2/3$, and $5/3$ that mix with the standard quarks of the same charge.