Hyperfine mixing in $b\to c$ semileptonic decay of doubly heavy baryons

Abstract

We qualitatively corroborate the results of W. Roberts and M. Pervin in Int. J. Mod. Phys. A 24, 2401 (2009) according to which hyperfine mixing greatly affects the decay widths of $b\to c$ semileptonic decays involving doubly heavy $bc$ baryons. However, our predictions for the decay widths of the unmixed states differ from those reported in the work of Roberts and Pervin by a factor of 2, and this discrepancy translates to the mixed case. We further show that the predictions of heavy quark spin symmetry, might be used in the future to experimentally extract information on the admixtures in the actual physical $bc$ baryons, in a model independent manner.

7 Latex pages, 4 Tables

References in corpus (5)

• Heavy Baryons in a Quark Model
• Ground-state triply and doubly heavy baryons in a relativistic three-quark model
• Static properties and semileptonic decays of doubly heavy baryons in a nonrelativistic quark model
• Semileptonic decays of double heavy baryons in a relativistic constituent three-quark model
• Heavy quark symmetry constraints on semileptonic form factors and decay widths of doubly heavy baryons

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• Triply Heavy Baryons and Heavy Quark Spin Symmetry
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