Doubly heavy quark baryon spectroscopy and semileptonic decay

Details Doubly heavy quark baryon spectroscopy and semileptonic decay Doubly heavy quark baryon spectroscopy and semileptonic decay

2006-10-11

arxiv.org/abs/hep-ph/0610131v1

Eur.Phys.J.A31:691-694,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk given at the IVth International Conference on Quarks an Nuclear Physics (QNP06), Madrid, June 5th-10th 2006

Scientific paper

10.1140/epja/i2006-10242-2

Working in the framework of a nonrelativistic quark model we evaluate the spectra and semileptonic decay widths for the ground state of doubly heavy $\Xi$ and $\Omega$ 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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