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Heavy Quark Expansion for Heavy Hadron Lifetimes: Completing the $1/m_b^3$ Corrections
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abstract
We complete the calculation of the contributions from the dimension six operators in the heavy quark expansion for the total lifetime of heavy hadrons. We give the expressions for the Wilson coefficients of the Darwin term $\rho_D$ and the spin-orbit term $\rho_{\rm LS}$ at tree level.
Forward citations
Cited by 6 Pith papers
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$B$-meson decay width up to $1/m_b^3$ corrections within and beyond the Standard Model
Complete analytic HQE matching coefficients for B-meson decay widths up to 1/m_b^3 are derived for generic new-physics operators, including previously missing weak-annihilation terms.
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Total decay rates of $B$ mesons at NNLO-QCD
At NNLO in QCD, the heavy quark expansion predicts the B+, Bd, and Bs decay widths and semileptonic branching fractions within experimental uncertainties, with a systematic 4% shortfall in the central width values.
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Predictions for $b$-baryon lifetimes at NNLO-QCD
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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Are Subleading Effects Really Subleading? $B$-Meson Decays in Mesogenesis
In B-Mesogenesis, formally subleading heavy-quark-expansion corrections to inclusive B decays exceed the leading free-quark decay for dark-fermion masses above about 2–3 GeV, limiting the reliable range of HQE-based c...
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Constraining $B$-Mesogenesis models with inclusive and exclusive decays
Combining inclusive and exclusive B-meson decay rates, the authors rule out B-Mesogenesis dark matter masses above 3 GeV and find lifetime ratios do not further constrain the model.
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Charm physics
A review chapter summarizing the theoretical framework and experimental status of charm hadron lifetimes, D0 mixing, CP violation, and rare decays.
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