Are there compact heavy four-quark bound states?

Details Are there compact heavy four-quark bound states? Are there compact heavy four-quark bound states?

2007-10-12

arxiv.org/abs/0710.2516v1

Phys.Rev.D76:094027,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 1 figure. Accepted for publication in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.76.094027

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, non-molecular, four-quark bound states. While $QQ\bar n \bar n$ states may be stable in nature, the stability of $Q\bar Qn \bar n$ states would imply the existence of quark correlations not taken into account by simple quark dynamical models

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