Heavy-to-light decays with a two-loop accuracy

Abstract

We present a determination of a new class of three-loop Feynman diagrams describing heavy-to-light transitions. We apply it to find the O(alpha_s^2) corrections to the top quark decay t -> bW and to the distribution of lepton invariant mass in the semileptonic b quark decay b -> ulν. We also confirm the previously determined total rate of that process as well as the O(alpha^2) corrections to the muon lifetime.

5 pages

References in corpus (11)

• High-precision calculation of multi-loop Feynman integrals by difference equations
• Complete 2-loop Quantum Electrodynamic Contributions to the Muon Lifetime in the Fermi Model
• Second Order QCD Corrections to $\Gamma (t\to Wb)$
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• The second order QCD contribution to the semileptonic b -> u decay rate
• Two-loop QCD corrections to top quark width
• Two-loop QCD corrections to $b\to c$ transitions at zero recoil
• Second Order Corrections to the Muon Lifetime and the Semileptonic B Decay
• Two-loop QCD Corrections to $b\to c$ Transitions at Zero Recoil: Analytical Results
• Semileptonic b --> u decays: lepton invariant mass spectrum
• O(alpha_s^2) corrections to b -> c decay at zero recoil

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