Predictions for the semi-leptonic and non-leptonic decays of the Λb and B meson

Details Predictions for the semi-leptonic and non-leptonic decays of the Λb and B meson Predictions for the semi-leptonic and non-leptonic decays of the Λb and B meson

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aipc..488..161d&link_type=abstract

"High energy physics at the millennium: MRST (Montreal-Rochester-Syracuse-Ontario)'99 "The sundarfest". AIP Conference Proceedi

Physics

High Energy Physics

Bottom Mesons, Decays Of Bottom Mesons

Scientific paper

Isospin predictions for the semi-leptonic and non-leptonic decays of the Λb baryon are given where isospin conservation of the strong interactions constrains the possible final states in Λb decays. Since the baryon hyperfine splittings depend upon light quark dynamics and do not decrease with increasing heavy quark mass, this leads in general to to phase space enhancements in Λb decays relative to B meson decays for the same underlying quark transitions making the Λb lifetime smaller than the B lifetime. Phase space enhancements in Λb decays relative to B decays can be understood in terms of hyperfine interactions in the heavy quark system. The quark-hadron duality for baryons appears to be broken.

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