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The European Physical Journal A

, Volume 31, Issue 4, pp 691–694 | Cite as

Doubly heavy-quark baryon spectroscopy and semileptonic decay

  • C. Albertus
  • E. Hernández
  • J. Nieves
  • J. M. Verde-Velasco
QNP 2006

Abstract.

Working in the framework of a nonrelativistic quark model we evaluate the spectra and semileptonic decay widths for the ground state of doubly heavy Ξ and Ω baryons. We solve the three-body problem using a variational ansatz made possible by the constraints imposed by heavy-quark spin symmetry. In order to check the dependence of our results on the inter-quark interaction, we have used five different quark-quark potentials which include Coulomb and hyperfine terms coming from one-gluon exchange, plus a confining term. Our results for the spectra are in good agreement with a previous calculation done using a Faddeev approach. For the semileptonic decay our results for the total decay widths are in good agreement with the ones obtained within a relativistic quark model in the quark-diquark approximation.

PACS.

12.39.Jh Nonrelativistic quark model 12.40.Yx Hadron mass models and calculations 13.30.Ce Leptonic, semileptonic, and radiative decays 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2007

Authors and Affiliations

  • C. Albertus
    • 1
  • E. Hernández
    • 2
  • J. Nieves
    • 1
  • J. M. Verde-Velasco
    • 2
  1. 1.Departamento de Fısica Atómica, Molecular y NuclearUniversidad de GranadaGranadaSpain
  2. 2.Grupo de Fısica Nuclear, Departamento de Fısica Fundamental e IUFFyMFacultad de CienciasSalamancaSpain

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