Spectator effects and lifetimes of heavy hadrons

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 Λ_b-baryon and B_d meson. We obtain τ(B_u)/τ(B_d) = 1.06 \pm 0.02, τ(B_s)/τ(B_d)= 1.00 \pm 0.01, τ(Λ_b)/τ(B_d)= 0.86 \pm 0.05.

arXiv comment20 pages, 8 figures; replaced to match the published version. Minor modifications to the text, numerical problem affecting the τ(B_u)/τ(B_d) ratio is fixed

References in corpus (20)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• QCD Predictions for Lepton Spectra in Inclusive Heavy Flavour Decays
• The Pole Mass of The Heavy Quark. Perturbation Theory and Beyond
• Spectator Effects in Inclusive Decays of Beauty Hadrons
• Width Difference in the $B_s-\overline{B_s}$ System
• CP asymmetry in flavour-specific B decays beyond leading logarithms
• The B^+ B_d^0 Lifetime Difference Beyond Leading Logarithms
• Lifetime Ratios of Beauty Hadrons at the Next-to-Leading Order in QCD
• A Lattice Study of Spectator Effects in Inclusive Decays of B-Mesons
• Lambda_b lifetime puzzle in heavy-quark expansion
• Enhancement of the ${\Lambda }_b$ decay rate
• Role of Four-Quark Operators in the Inclusive ${\Lambda }_b$ Decays
• An Exploratory Lattice Study of Spectator Effects in Inclusive Decays of the Lambda_b Baryon
• B0 - anti-B0 mixing beyond factorization
• Next-to-Leading Order QCD Corrections to Spectator Effects in Lifetimes of Beauty Hadrons
• Beauty Hadron Lifetimes and B-Meson CP-Violation Parameters from Lattice QCD
• Four-quark Operators Relevant to B Meson Lifetimes from QCD Sum Rules
• Lifetime-difference pattern of heavy hadrons
• Non-Leptonic Decays of Beauty Hadrons -- from Phenomenology to Theory
• Phenomenology of V_ub from Ratios of Inclusive B Decay Rates

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