Quarks and diquarks in a baryon string model

Abstract

Chew-Frautschi plots are found for baryons containing a quark and a diquark at the extremities of a relativistic string. The quark fields are modelled on free Dirac fields restricted to the ends of the string. Quantum numbers for the diquark field are obtained by adding those for two individual quark fields. The leading trajectory for the quark-diquark configuration is found to be energetically more favourable than the leading trajectories for the linear and Y-shaped baryon configurations considered previously.