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Hyperfine mixing in b -> c semileptonic decay of doubly heavy baryons

AuthorsNieves, Juan Miguel ; Albertus, Conrado ; Hernández, Eliecer
Issue Date11-Jan-2010
CitationPhysics Letters - Section B 683 (1): 21-25 (2010)
AbstractWe qualitatively corroborate the results of [W. Roberts, M. Pervin, Int. J. Mod. Phys. A 24 (2009) 2401] according to which hyperfine mixing greatly affects the decay widths of b -> 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.
Publisher version (URL)http://dx.doi.org/ 10.1016/j.physletb.2009.11.048
Appears in Collections:(IFIC) Artículos
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