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Doubly heavy quark baryon spectroscopy and semileptonic decay

C. Albertus·E. Hernandez·J. Nieves·J. M. Verde-Velasco
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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 resultson the inter-quark interaction we have used five different quarkquark potentials which include Coulomb and hyperfine terms coming fromone-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 a good agreement with the ones obtained within a relativistic quark model in the quark-diquark approximation.

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C. Albertus, E. Hernandez, J. Nieves, J. M. Verde-Velasco. 2006-10-11. Doubly heavy quark baryon spectroscopy and semileptonic decay. https://doi.org/10.1140/epja%2Fi2006-10242-2

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