Papers › New physics contributions to moments of inclusive b →c semileptonic decays
New physics contributions to moments of inclusive b →c semileptonic decays
Matteo Fael, Muslem Rahimi, K. Keri Vos
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Inclusive semileptonic B→X_c ℓν̅_ℓ 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_c ℓν̅ 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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