New physics contributions to moments of inclusive b -> c semileptonic decays

M. Fael*, M. Rahimi, K.K. Vos

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


Inclusive semileptonic B →X cℓν¯ decays, where ℓ = μ, e, are by now standard candles in the determination of the CKM element |V cb|. 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 cℓν¯ 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.

Original languageEnglish
Article number086
Number of pages29
JournalJournal of High Energy Physics
Issue number2
Publication statusPublished - 8 Feb 2023


  • Semi-Leptonic Decays
  • Bottom Quarks
  • Other Weak Scale BSM Models


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