Hyperfine mixing in electromagnetic decay of doubly heavy $bc$ baryons

Details Hyperfine mixing in electromagnetic decay of doubly heavy $bc$ baryons Hyperfine mixing in electromagnetic decay of doubly heavy $bc$ baryons

2010-04-19

arxiv.org/abs/1004.3154v2

Physics Letters B 690 (2010) 265-271

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 Latex pages, 4 tables. A new reference added. A few misprints corrected

Scientific paper

10.1016/j.physletb.2010.05.042

We investigate the role of hyperfine mixing in the electromagnetic decay of ground state doubly heavy $bc$ baryons. As in the case of a previous calculation on $b\to c$ semileptonic decays of doubly heavy baryons, we find large corrections to the electromagnetic decay widths due to this mixing. Contrary to the weak case just mentioned, we find here that one can not use electromagnetic width relations obtained in the infinite heavy quark mass limit to experimentally extract information on the admixtures in a model independent way.

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