New physics contributions to moments of inclusive $b\to c$ semileptonic decays

Abstract

Inclusive semileptonic $B\to X_c\ell {\bar{\nu }}_{\ell }$ decays, where $\ell =\mu ,e$, 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 $B\to X_c\ell \bar{\nu }$ 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.

28 pages, 7 figures. v2: version published in JHEP; added Appendix B

References in corpus (21)

• FeynCalc 9.3: New features and improvements
• Renormalization-group evolution of new physics contributions to (semi)leptonic meson decays
• The $V_{cb}$ puzzle: an update
• Can the differences in the determinations of $V_{ub}$ and $V_{cb}$ be explained by New Physics?
• Three loop calculations and inclusive $V_{cb}$
• Heavy-Quark Expansion for ${\bar{B}}_s\to D_s^{(\ast )}$ Form Factors and Unitarity Bounds beyond the $SU(3{)}_F$ Limit
• Higher Order Power Corrections in Inclusive B Decays
• Semileptonic form factors for $B\to D^{\ast }\ell \nu$ at nonzero recoil from 2 + 1-flavor lattice QCD
• Inclusive semi-leptonic decays from lattice QCD
• Challenges in Semileptonic B Decays
• EOS -- A Software for Flavor Physics Phenomenology
• Lepton-flavour non-universality of $\bar{B}\to D^{\ast }\ell \bar{\nu }$ angular distributions in and beyond the Standard Model
• The role of right-handed neutrinos in $b\to c\tau \bar{\nu }$ anomalies
• Tension in the inclusive versus exclusive determinations of $|V_{cb}|$: a possible role of new physics
• Lattice QCD study of inclusive semileptonic decays of heavy mesons
• The Kinetic Heavy Quark Mass to Three Loops
• On the relation between the $\overline{\mathrm{MS}}$ and the kinetic mass of heavy quarks
• Exclusive determinations of $|V_{cb}|$ and $R(D^{\ast })$ through unitarity
• Complete Michel Parameter Analysis of inclusive semileptonic b \to c transition
• Renormalon subtraction in OPE using Fourier transform: Formulation and application to various observables
• The forward-backward asymmetry and differences of partial moments in inclusive semileptonic B decays

Cited by in corpus (1)

• On sum rules for semi-leptonic $b\to c$ and $b\to u$ decays