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QCD corrections for subleading powers in 1/m_b for the nonleptonic brightarrow cbar c s transition
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QCD corrections for subleading powers in 1/m_b for the nonleptonic brightarrow cbar c s transition
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We compute next-to-leading order QCD corrections to the $1/m_b^2$ terms of the Heavy Quark Expansion for the contribution to inclusive nonleptonic bottom hadron decays induced by the charged-current operators mediating the transitions $b \to c \bar c q$ ($q = s,d$). Their contributions to lifetimes are Cabibbo favoured and have large Wilson coefficents, but have not been computed before, since the presence of two heavy quarks in the final state makes this calcuation technically demanding. It finally adds the last missing piece of the full NLO terms at $1/m_b^2$ in the heavy quark expansion of $B$-hadron lifetimes. We obtain analytical results with full dependence on the final-state charm quark mass, which we provide in the supplemental file "coefbccs.m".
Forward citations
Cited by 3 Pith papers
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Inclusive Charmless Non-Leptonic B Decays at NLO within and beyond the Standard Model
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NNLO-QCD corrections to the free b-quark decay and NLO corrections to dimension-five operators reduce uncertainties in HQE predictions for b-baryon lifetimes, yielding excellent agreement with experiment.
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New Predictions for the Lifetimes of Doubly Heavy Baryons and the $B_c$ Meson
Updated lifetime predictions for doubly heavy baryons and B_c meson with NNLO and NLO corrections in MS-bar, kinetic, and Upsilon mass schemes, including new hierarchies for bc states.
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