Diquark properties from lattice QCD

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.