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Journal Articles Physical Review D Year : 2011

Stability of hexaquarks in the string limit of confinement

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J. Vijande
  • Function : Author
A. Valcarce
  • Function : Author
J.-M. Richard
  • Function : Author

Abstract

The stability of systems containing six quarks or antiquarks is studied within a simple string model inspired by the strong-coupling regime of quantum chromodynamics and used previously for tetraquarks and pentaquarks. We discuss both six-quark $(q^6)$ and three-quark--three-antiquark $ (q^3\bar q{}^3)$ states. The quarks are assumed to be distinguishable and thus not submitted to antisymmetrization. It is found that the ground state of $(q^6)$ is stable against dissociation into two isolated baryons. For the case of $ (q^3\bar q{}^3)$, our results indicate the existence of a bound state very close to the threshold. The investigations are extended to $(q^3Q^3)$ and $(Q^3\bar q^3)$ systems with two different constituent masses, and their stability is discussed as a function of the mass ratio.

Dates and versions

in2p3-00722282 , version 1 (01-08-2012)

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J. Vijande, A. Valcarce, J.-M. Richard. Stability of hexaquarks in the string limit of confinement. Physical Review D, 2011, 85, pp.014019. ⟨10.1103/PhysRevD.85.014019⟩. ⟨in2p3-00722282⟩
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