Journal
PHYSICS LETTERS B
Volume 683, Issue 1, Pages 21-25Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2009.11.048
Keywords
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Funding
- DGI
- FEDER [FIS2008-01143/FIS, FIS2006-03438, FPA2007-65748]
- Spanish Consolider-Ingenio [CSD2007-00042]
- Junta de Castilla y Leon [SA016A07, GR12]
- EU
- PIE-CSIC [2008501238]
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We 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. (C) 2009 Elsevier B.V. All rights reserved.
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