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2nd International Conference on Quark Confinement and the Hadron Spectrum, Como : Italie
Multiquark systems in a constituent quark model with chiral dynamics
S. Pepin, F. Stancu, M. Genovese1, J.-M. Richard1

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. We find that such an interaction binds a heavy tetraquark system $QQ\bar q\bar q$ ($Q=c, b$ 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.
1 :  LPSC - Laboratoire de Physique Subatomique et de Cosmologie
Physique/Physique Nucléaire Théorique
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