Spectator effects and lifetimes of heavy hadrons

Preprint

1 July 2004

preprint
Published by arXiv in arXiv

Abstract

We present a calculation of subleading 1/m_b 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/m_b corrections brings into agreement the theoretical predictions and experimental observations of the ratio of lifetimes of \Lambda_b-baryon and B_d meson. We obtain \tau(B_u)/\tau(B_d) = 1.09 \pm 0.03, \tau(B_s)/\tau(B_d)= 1.00 \pm 0.01, \tau(\Lambda_b)/\tau(B_d)= 0.87 \pm 0.05.

Keywords

LIFETIMES IN HEAVY
SPECTATOR EFFECTS
1/M_B CORRECTIONS
HEAVY HADRONS
TAU

All Related Versions

Version 1, 2004-07-01, ArXiv
Version 2, 2004-10-21, ArXiv
Published version: Physical Review D, 70 (9), 094031.

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