Phys. Rev. D 70, 094031 (2004) [12 pages]Spectator effects and lifetimes of heavy hadronsReceived 22 July 2004; published 17 November 2004 We present a calculation of subleading 1/mb corrections to spectator effects in the ratios of beauty hadron lifetimes in heavy-quark expansion. We find 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 Λb baryon and Bd meson. We obtain τ(Bu)/τ(Bd)=1.06±0.02, τ(Bs)/τ(Bd)=1.00±0.01, τ(Λb)/τ(Bd)=0.86±0.05. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.70.094031
DOI:
10.1103/PhysRevD.70.094031
PACS:
12.39.Hg, 13.25.Hw, 13.30.Eg
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