Stability of multiquarks in a simple string model

Abstract

A simple string model inspired by the strong-coupling regime of Quantum ChromoDynamics is used as a potential for studying the spectrum of multiquark systems with two quarks and two antiquarks, with a careful treatment of the four-body problem. It is found that the ground state is stable, lying below the threshold for dissociation into two isolated mesons.

Comments: 4 pages, 2 figures, Refs. added, typos corrected, discussion improved, to appear in Phys. Rev. D