Orateur
Dr
Javier Vijande
(University of Valencia)
Description
In order to discuss the stability of four–quark states against dissociation into two isolated
mesons we shall present in this talk an exact method to study four-quark systems based on the hyperspherical harmonics formalism. We shall apply it to several physical systems of interest containing two heavy and two light quarks using different non–relativistic quark-quark potentials. Our conclusions mark the boundaries for the possible existence of compact, non-molecular, four-quark bound states. While (Q,Qnbar,nbar) states may be stable in nature, the stability of (Q,Qbar,n,nbar)
states would imply the existence of quark correlations not taken into account by simple quark dynamical models. The possible role played by confining interactions not factorizable into simple two-body components will be discussed.
Auteurs principaux
Dr
Javier Vijande
(University of Valencia)
Dr
Valcarce Alfredo
(University of Salamanca)
