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Kolya: an open-source package for inclusive semileptonic $B$ decays

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arxiv 2409.15007 v1 pith:Q3SU4FBM submitted 2024-09-23 hep-ph hep-exhep-lat

Matteo Fael , Ilija S. Milutin , K. Keri Vos This is my paper · ORCID
classification hep-phhep-exhep-lat
keywords librarycorrectionsdecaysevaluationinclusivekolyaopen-sourcequark
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

We introduce the code kolya, an open-source tool for phenomenological analyses of inclusive semileptonic $B$ meson decays. It contains a library to compute predictions for the total rate and various kinematic moments within the framework of the heavy quark expansion, utilizing the so-called kinetic scheme. The library currently includes power corrections up to $1/m_b^5$. All available QCD perturbative corrections are implemented via interpolation grids for fast numerical evaluation. We also include effects from new physics parameterised as Wilson coefficients of dimension-six operators in the weak effective theory below the electroweak scale. The library is interfaced to CRunDec for easy evaluation of the quark masses and strong coupling constant at different renormalization scales. The library is developed in Python and does not require compilation. It can be used in an interactive Jupyter notebook session.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Total decay rates of $B$ mesons at NNLO-QCD

    hep-ph 2024-12 conditional novelty 7.0 of 10

    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.

  2. New Physics in inclusive semileptonic $B$ decays

    hep-ph 2025-07 conditional novelty 6.0 of 10

    A global fit to inclusive semileptonic B decay moments and rate constrains all seven dimension-six new-physics parameters, finding no significant BSM signal but new bounds, especially on the right-handed vector Wilson...

  3. Kinematic Moments of $\bar{B}\to X_c \ell \bar{\nu}_\ell$ to Order $\mathcal{O}(\Lambda_{\rm QCD}^5/m_b^5)$

    hep-ph 2025-01 conditional novelty 6.0 of 10

    Analytic HQE moments for inclusive B to X_c l nu are extended to O(Lambda^5/m_b^5), including q^2 moments with a lepton-energy cut, and a CLEO data tension is identified.

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