Hyperfine Interactions in Charm and Bottom Systems

Details Hyperfine Interactions in Charm and Bottom Systems Hyperfine Interactions in Charm and Bottom Systems

1997-05-20

arxiv.org/abs/hep-ph/9705363v2

Phys.Lett. B409 (1997) 412-416

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, plain Latex, no figures. A new isospin argument has been added

Scientific paper

10.1016/S0370-2693(97)00884-8

Hyperfine interactions in the light meson and baryon sectors are generalized to the charm and bottom systems. It is pointed out that an attempt to increase the value of the wave function at the origin to account for the unusual ratio of $\Lambda_{b}$ to the $B^0$ lifetimes could spoil the good agreement among the baryon and meson hyperfine mass-splitting. Including spin effects and taking phase space differences into account we predict that the decay rate of the $\Lambda_{b}$ can be increased relative to that of the $B^0$ meson by about 7%.

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