Abstract
Inclusive semileptonic B → \( {X}_c\ell {\overline{\nu}}_{\ell } \) decays, where ℓ = μ, e, are by now standard candles in the determination of the CKM element |Vcb|. These determinations rely on the heavy-quark expansion and use moments of decay spectra to extract the non-perturbative parameters directly from data under the standard model assumption.
At the same time, new physics could influence the moments of the inclusive decay. In this paper, we compute power-corrections and next-to-leading order corrections in the strong coupling constant using the full basis of dimension-six new physics operators for the inclusive B → \( {X}_c\ell \overline{\nu} \) decay. We provide predictions for lepton energy, hadronic and leptonic invariant mass moments, and perform a phenomenological study to show the possible impact of new physics. Our results could be used to perform a global fit including new physics contributions.
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Fael, M., Rahimi, M. & Vos, K.K. New physics contributions to moments of inclusive b → c semileptonic decays. J. High Energ. Phys. 2023, 86 (2023). https://doi.org/10.1007/JHEP02(2023)086
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DOI: https://doi.org/10.1007/JHEP02(2023)086