Lifetime ratios of beauty hadrons at the next-to-leading order in QCD

2002/03/08 by E. Franco, V. Lubicz, F. Mescia +1 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat #hep-ph

paper · pdf · doi:10.1016/s0550-3213(02)00262-6

published as Nucl.Phys. B633 (2002) 212-236 · 24 pages, 4 figures

arxiv created 2002/03/08 · openalex publication_date 2002/06/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We compute the next-to-leading order QCD corrections to spectator effects in the lifetime ratios of beauty hadrons. With respect to previous calculations, we take into account the non vanishing value of the charm quark mass. We obtain the predictions tau(B+)/tau(Bd) = 1.06 +- 0.02, tau(Bs)/tau(Bd)= 1.00 +- 0.01 and tau(Lambdab)/tau(Bd) = 0.90 +- 0.05, in good agreement with the experimental results. In the case of tau(Bs)/tau(Bd) and tau(Lambdab)/tau(Bd), however, some contributions, which either vanish in the vacuum insertion approximation or represent a pure NLO corrections, have not been determined yet.

Citations

• Calculation of the D- and B-meson lifetimes and the unitarity triangle parameters
• Integration by parts: The algorithm to calculate β-functions in 4 loops
• On the problem of boosting non-leptonic b baryon decays

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