Preasymptotic effects in beauty decays
arXiv:hep-ph/0001280 · doi:10.1142/9789812791870_0024
Abstract
Large preasymptotic effects in beauty decays have been found using heavy-quark and SU(3) symmetry, as well as experimental data on charmed hyperons. Contrary to rather uniform beauty-meson lifetimes, a much larger spread of beauty-baryon lifetimes is predicted. However, it is highly unlikely that, theoretically, the $ Ï(Î_b)/Ï(B_d^0) $ ratio, which at present deviates more than $1Ï$ from the experimental result, can be lowered below 0.9.
6 pages, talk given by B. Melic at The 3rd International Conference on B Physics and CP Violation, Taipei, Taiwan, December 3-7, 1999, to appear in the Proceedings, two figures added