Diquarks from a fourth family

TL;DR

This paper explores the theoretical possibility of diquarks arising from a hypothetical fourth family of particles, analyzing their properties, decay modes, and potential signatures at colliders like the LHC and Tevatron.

Contribution

It introduces the concept of diquarks associated with a fourth family, detailing their characteristics and proposing search strategies for collider experiments.

Findings

Color sextet diquarks with 600 GeV mass could produce detectable signatures at the LHC.

Diquarks with 350 GeV mass are accessible at the Tevatron.

Distinct decay modes and signatures are identified for these diquarks.

Abstract

If fourth family condensates are responsible for electroweak symmetry breaking then they may also break approximate global symmetries. Among the resulting pseudo-Goldstone bosons are those that can have diquark quantum numbers. We describe the variety of diquarks and their decay modes, and we find aspects that are particular to the fourth family framework. Spectacular signatures at the LHC appear and are explored for color sextet diquarks with 600 GeV mass. We consider a simple search strategy which avoids diquark reconstruction. We also consider 350 GeV mass diquarks that are accessible at the Tevatron.