Predictions for the semi-leptonic and non-leptonic decays of the {lambda}{sub b} and B meson
- Department of Physics, University of Toronto, Toronto (Canada)
- Department of Particle Physics, Weizmann Institute, Rehovot 76100 (Israel)
Isospin predictions for the semi-leptonic and non-leptonic decays of the {lambda}{sub b} baryon are given where isospin conservation of the strong interactions constrains the possible final states in {lambda}{sub b} 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 {lambda}{sub b} decays relative to B meson decays for the same underlying quark transitions making the {lambda}{sub b} lifetime smaller than the B lifetime. Phase space enhancements in {lambda}{sub b} 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.
- OSTI ID:
- 21210540
- Journal Information:
- AIP Conference Proceedings, Vol. 488, Issue 1; Conference: MRST (Montreal-Rochester-Syracuse-Ontario)'99 conference: High energy physics at the millennium - 'The sundarfest', Ottawa, ON (United States), 10-12 May 1999; Other Information: DOI: 10.1063/1.1301952; (c) 1999 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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