Doubly heavy quark baryon spectroscopy and semileptonic decay

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 $\Xi$ 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.

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

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• Triply Heavy Baryons and Heavy Quark Spin Symmetry
• Doubly heavy baryons at LHC
• Heavy hadron spectroscopy and the bag model
• Estimates of W-exchange contributions to ${\Xi }_{cc}$ decays
• Magnetic Moments of Bottom Baryons: Effective mass and Screened Charge
• Weak Decays of Doubly Heavy Baryons: ${\mathcal{B}}_{cc}\to {\mathcal{B}}_{c}V$
• A comprehensive analysis of weak transition form factors for doubly heavy baryons in the light front approach
• Exclusive $c\to s,d$ semileptonic decays of ground-state spin-1/2 doubly charmed baryons
• Weak Decays of Doubly Heavy Baryons: ${\mathcal{B}}_{cc}\to \mathcal{B}{D}^{(\ast )}$
• Exclusive $c\to s,d$ semileptonic decays of ground-state spin-1/2 and spin-3/2 doubly heavy $cb$ baryons
• Production of double charmed baryons with the excited heavy diquark at LHC
• Pair $(bc)$ diquarks production in high energy proton--proton collisions
• The production of excited states of doubly heavy baryons at the Large Hadron Collider
• Exclusive $c\to s,d$ semileptonic decays of spin-1/2 and spin-3/2 $cb$ baryons