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Are there compact heavy four-quark bound states?

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	Vijande Asenjo, Javier Perfil; Weissman, E.; Valcarce Mejía, Alfredo; Barnea, Nir
	This document is a artículoDate2007
	Este documento está disponible también en : http://hdl.handle.net/10550/39101
	We present an exact method to study four-quark systems based on the hyperspherical harmonics formalism. We apply it to several physical systems of interest containing two heavy and two light quarks using different quark-quark potentials. Our conclusions mark the boundaries for the possible existence of compact, nonmolecular, four-quark bound states. While QQ (n) over bar(n) over bar states may be stable in nature, the stability of Q (Q) over barn (n) over bar states would imply the existence of quark correlations not taken into account by simple quark dynamical models.
	Vijande Asenjo, Javier Weissman, E. Valcarce Mejía, Alfredo Barnea, Nir 2007 Are there compact heavy four-quark bound states? Physical Review D 76 9 094027
	http://dx.doi.org/10.1103/PhysRevD.76.094027