Corpus ID: 237940958

Revisiting Inclusive Decay Widths of Charmed Mesons

@inproceedings{King2021RevisitingID,
  title={Revisiting Inclusive Decay Widths of Charmed Mesons},
  author={Daniel King and Alexander Lenz and Maria Laura Piscopo and Thomas Rauh and Aleksey V. Rusov and Christos Vlahos},
  year={2021}
}
Determining for the first time the Darwin operator contribution for the non-leptonic charm-quark decays and using new non-perturbative results for the matrix elements of ∆C = 0 four-quark operators, including eye-contractions, we present a comprehensive study of the lifetimes of charmed mesons and inclusive semileptonic decay rates as well as the ratios, within the framework of the Heavy Quark Expansion (HQE). We find good agreement with experiment for the ratio τ(D+)/τ(D0), for the total D+ s… Expand
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References

SHOWING 1-10 OF 96 REFERENCES
D-meson lifetimes within the heavy quark expansion
Even if new data indicate that direct CP violation in D -meson decays is compatible with the standard model expectation, the first hints for direct CP violation have triggered a lot of interest, andExpand
Next-to-leading order radiative corrections to the decay b → ccs
Abstract We calculate the complete O ( α s ) corrections to the quark decay b → ccs taking full account of the quark masses, but neglecting penguin contributions. For a c to the b quark mass ratio mExpand
On the O ( α 2 s ) corrections to b → X u eν̄ inclusive decays
We present O(α2 s) QCD corrections to the fully-differential decay rate of a b-quark into inclusive semileptonic charmless final states. Our calculation provides genuine two-loop QCD corrections,Expand
Phenomenological study of heavy hadron lifetimes
A bstractThe lifetimes of bottom and charmed hadrons are analyzed within the framework of the heavy quark expansion (HQE). Lifetime differences arise from the spectator effects such as weakExpand
Dimension-six matrix elements for meson mixing and lifetimes from sum rules
A bstractThe hadronic matrix elements of dimension-six ∆F = 0, 2 operators are crucial inputs for the theory predictions of mixing observables and lifetime ratios in the B and D system. We determineExpand
Two-loop QCD corrections to the heavy-to-light quark decay
We present an analytic expression for the two-loop QCD corrections to the decay process b ? u?W*, where b and u are a massive and massless quark, respectively, while W* is an off-shell charged weakExpand
A Lattice study of spectator effects in inclusive decays of B mesons
Abstract We compute the matrix elements of the operators which contribute to spectator effects in inclusive decays of B -mesons. The results agree well with estimates based on the vacuum saturationExpand
The heavy quark expansion for inclusive semileptonic charm decays revisited
The Heavy Quark Expansion (HQE) has become an extremely powerful tool in flavor physics. For charm decays, where the expansion parameters $\alpha_s(m_c)$ and $\Lambda_{\rm QCD}/m_c$ are bigger thanExpand
The B + – B 0 d Lifetime Difference Beyond Leading Logarithms
We compute perturbative QCD corrections to the lifetime spl itting between the charged and neutralB meson in the framework of the heavy quark expansion. These ne xt-to-leading logarithmic correctionsExpand
Nonperturbative corrections to inclusive beauty and charm decays. QCD versus phenomenological models
Abstract We present a self-consistent method for treating nonperturbative effects in inclusive nonleptonic and semileptonic decays of heavy flavour hadrons. These effects give rise to powerlikeExpand
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