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Mass effects in muon and semileptonic b -> c decays

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arxiv 0803.0960 v1 pith:SGCXQSU4 submitted 2008-03-06 hep-ph

Mass effects in muon and semileptonic b -> c decays

classification hep-ph
keywords decayeffectsenergymuonratesemileptonicalphaapplied
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Quantum chromodynamics (QCD) effects in the semileptonic decay b -> c l nu are evaluated to the second order in the coupling constant, O(alpha_s^2), and to several orders in the expansion in quark masses, m_c/m_b. Corrections are calculated for the total decay rate as well as for the first two moments of the lepton energy and the hadron system energy distributions. Applied to the muon decay, they decrease its predicted rate by -0.43 ppm.

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Cited by 3 Pith papers

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  2. Inclusive Charmless Non-Leptonic B Decays at NLO within and beyond the Standard Model

    hep-ph 2026-07 accept novelty 6.0

    Complete NLO QCD corrections to charmless inclusive non-leptonic B-decay widths are computed for the full BSM operator set, yielding 26 constrained directions in Wilson coefficient space.

  3. Muon lifetime and Fermi constant: an update

    hep-ph 2026-07 accept novelty 4.5

    Updated Δq = (−4 384 678 ± 34)×10^{-9} reduces theory error on the muon lifetime by an order of magnitude and gives G_F = 1.166 378 59(59)×10^{-5} GeV^{-2}.