Tetraquarks with colour-blind forces in chiral quark models
arXiv:hep-ph/9609348 · doi:10.1016/S0370-2693(96)01597-3
Abstract
We discuss the stability of multiquark systems within the recent model of Glozman et al. where the chromomagnetic hyperfine interaction is replaced by pseudoscalar-meson exchange contributions. We find that such an interaction binds a heavy tetraquark systems $QQ\bar q\bar q$ ($Q=c,b and q=u,d)$ by 0.2-0.4 GeV. This is at variance with results of previous models where $cc\bar q\bar q$ is unstable.
10 pages, plain teX