Diquarks and the Bosonisation of QCD

Abstract

Previously the functional integral formulation of quantum chromodynamics <QCD) has been transformed into one involving colour singlet and colour octet bilocal fields describing qq states. While useful in determining the effective action for the observable colour singlet mesons, this formulation is of no use in determining the effective action for the baryon states. Here we show that there exists an alternative bosonisation of QCD in which the colour singlet meson fields and the colour triplet diquark fields form a complete set of functional integration variables. These diquark fields play an essential role in the colour singlet baryon states.