BsLifetimes of Heavy Hadrons

Alexey Petrov

Wayne State

I review current status of theoretical predictions of lifetimes of heavy hadrons in heavy-quark expansion. I present a calculation of subleading 1/mb corrections to spectator effects in the ratios of beauty hadron lifetimes. It was found that these effects are sizable and should be taken into account in systematic analyses of heavy hadron lifetimes. In particular, the inclusion of 1/mb corrections brings into agreement the theoretical predictions and experimental observations of the ratio of lifetimes of Lambda_b-baryon and B_d meson.

Last modified: Mon Mar 21 18:38:20 EST 2005