Non-spectator Contributions To The Lifetime of $Λ_{b}$

Details Non-spectator Contributions To The Lifetime of $Λ_{b}$ Non-spectator Contributions To The Lifetime of $Λ_{b}$

2003-04-15

arxiv.org/abs/hep-ph/0304136v1

Commun.Theor.Phys. 42 (2004) 723-734

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

In this work, we evaluate the contributions of non-spectator effects to the lifetimes of $\Lambda_b$ and B-mesons. Based on the well-established models and within a reasonable range of the concerned parameters, the contributions can reduce the lifetime of $\Lambda_b$ by $7 \sim 8%$ compared to that of B-mesons which are not significantly affected. This might partly explain the measured ratio $\tau(\Lambda_{b})/\tau(B^{0})=0.79 $ \cite{Data}, which has been a long-standing discrepancy between theory and experimental data.

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