Diquark properties from lattice QCD

TL;DR

This paper uses lattice QCD calculations to investigate the properties of diquarks, which are pairs of quarks in the anti-triplet color state, to better understand their role in baryons.

Contribution

It provides a novel lattice QCD analysis of diquark properties near the chiral limit using MILC dynamical fermion lattices with domain wall valence quarks.

Findings

Diquark properties extracted from lattice QCD.

Supports the idea of tightly bound scalar diquarks.

Provides phenomenological insights into diquark structure.

Abstract

It has been argued recently that diquarks, a pair of quarks in the anti-triplet representation of SU(3) color, are important building blocks of baryons. The assumption that the scalar diquark is tightly bound seems to be nicely accommodated by experimental data. In this paper I attempt to extract phenomenological properties of diquarks from lattice QCD calculations. In particular, I use the MILC 2+1 dynamical fermion lattices with domain wall fermion valence quarks to probe diquarks very close to the chiral limit.