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Stability of hexaquarks in the string limit of confinement

J. Vijande A. Valcarce J.-M. Richard 1
1 Théorie
IP2I Lyon - Institut de Physique des 2 Infinis de Lyon
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.
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Submitted on : Wednesday, August 1, 2012 - 10:46:03 AM
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J. Vijande, A. Valcarce, J.-M. Richard. Stability of hexaquarks in the string limit of confinement. Physical Review D, American Physical Society, 2011, 85, pp.014019. ⟨10.1103/PhysRevD.85.014019⟩. ⟨in2p3-00722282⟩



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