Anomalies in the heavy sector

Abstract

Heavy flavour physics is well described by the Standard Model with the exception of some measurements which could be pointing to new physics. We briefly review status and prospects of $R(D^{(\ast )})$ and $R(K^{(\ast )})$ anomalies and also address the long standing tension in the $|V_{cb}|$ and $|V_{ub}|$ exclusive/inclusive determinations.

arXiv comment8 pages, presented to XVth Quark Confinement and the Hadron Spectrum, University of Stavanger, Norway, August 1st - 6th, 2022

References in corpus (46)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• CP Violation and the CKM Matrix: Assessing the Impact of the Asymmetric B Factories
• Test of lepton universality using $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• Evidence for an excess of B -> D(*) Tau Nu decays
• Test of lepton universality with $B^0\to K^{\ast 0}{\ell }^{+}{\ell }^{-}$ decays
• Measurement of the ratio of branching fractions $\mathcal{B}({\overline{B}}^0\to D^{\ast +}{\tau }^{-}{\overline{\nu }}_{\tau })/\mathcal{B}({\overline{B}}^0\to D^{\ast +}{\mu }^{-}{\overline{\nu }}_{\mu })$
• FLAG Review 2021
• Measurement of the $\tau$ lepton polarization and $R(D^{\ast })$ in the decay $\bar{B}\to D^{\ast }{\tau }^{-}{\bar{\nu }}_{\tau }$
• On the Standard Model predictions for $R_K$ and $R_{K^{\ast }}$
• Measurement of the Differential Branching Fraction and Forward-Backword Asymmetry for B->K(*)l+l-
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2018
• Test of lepton universality in beauty-quark decays
• Differential branching fractions and isospin asymmetries of $B\to K^{(\ast )}{\mu }^{+}{\mu }^{-}$ decays
• Patterns of New Physics in $b\to s{\ell }^{+}{\ell }^{-}$ transitions in the light of recent data
• Angular Distributions of B -> K ll Decays
• Measurement of the ratio of the $B^0\to D^{\ast -}{\tau }^{+}{\nu }_{\tau }$ and $B^0\to D^{\ast -}{\mu }^{+}{\nu }_{\mu }$ branching fractions using three-prong $\tau$-lepton decays
• Confronting lepton flavor universality violation in B decays with high-$p_T$ tau lepton searches at LHC
• Measurement of the ratio of branching fractions $\mathcal{B}(B_c^{+}\to J/\psi {\tau }^{+}{\nu }_{\tau })$/$\mathcal{B}(B_c^{+}\to J/\psi {\mu }^{+}{\nu }_{\mu })$
• B-decay discrepancies after Moriond 2019
• Measurement of $\mathcal{R}(D)$ and $\mathcal{R}(D^{\ast })$ with a semileptonic tagging method
• Factorization and Shape-Function Effects in Inclusive B-Meson Decays
• Matching of gauge invariant dimension 6 operators for $b\to s$ and $b\to c$ transitions
• B physics Beyond the Standard Model at One Loop: Complete Renormalization Group Evolution below the Electroweak Scale
• Inclusive semileptonic B decays and the determination of |V_ub|
• Test of lepton flavor universality and search for lepton flavor violation in $B\to K\ell \ell$ decays
• Observation of B^0 \to D^{*-} τ^+ ν_τ decay at Belle
• The $B$ Anomalies and New Physics in $b\to s{e}^{+}{e}^{-}$
• Inclusive spectra in charmless semileptonic B decays by Dressed Gluon Exponentiation
• Three loop calculations and inclusive $V_{cb}$
• Subleading Shape Functions in Inclusive B Decays
• Observation of the Semileptonic Decays B --> D* tau nubar and Evidence for B --> D tau nubar
• Tests of lepton universality using $B^0\to K_S^0{\ell }^{+}{\ell }^{-}$ and $B^{+}\to K^{\ast +}{\ell }^{+}{\ell }^{-}$ decays
• Anomalies in Bottom from new physics in Top
• Observation of the decay ${\Lambda }_b^0\to {\Lambda }_c^{+}{\tau }^{-}{\overline{\nu }}_{\tau }$
• $R(J/\psi )$ and $B_c^{-}\to J/\psi {\ell }^{-}{\bar{\nu }}_{\ell }$ Lepton Flavor Universality Violating Observables from Lattice QCD
• Test of lepton universality with ${\Lambda }_b^0\to p{K}^{-}{\ell }^{+}{\ell }^{-}$ decays
• The impact of flavour data on global fits of the MFV SMEFT
• Semi-Inclusive B Decays and a Model for Soft-Gluon Effects
• Inclusive Measure of |V_ub| with the Analytic Coupling Model
• The CKM Parameters
• Measurement Of |V_ub| From Inclusive Charmless Semileptonic B Decays
• Lattice QCD study of inclusive semileptonic decays of heavy mesons
• Semileptonic decays and $|V_{xb}|$ determinations
• Semileptonic and leptonic $B$ decays, circa 2016
• Status of $|V_{cb}|$ and $|V_{ub}|$ CKM matrix elements
• Measurement of Differential Branching Fractions of Inclusive $B\to X_u{\ell }^{+}{\nu }_{\ell }$ Decays