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Spectator Effects and Lifetimes of Heavy Hadrons by Gabbiani, Fabrizio; Onishchenko, Andrei I.; Petrov, Alexey A. is a scholarly article available to read on EtoBox.

What is Spectator Effects and Lifetimes of Heavy Hadrons about?

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) = 1.06 \pm 0.02, \tau(B_s)/\tau(B_d)= 1.00 \pm 0.01, \tau(\Lambda_b)/\tau(B_d)= 0.86 \pm 0.05.

Author

Gabbiani, Fabrizio; Onishchenko, Andrei I.; Petrov, Alexey A.

Published

2004

Language

EN