Averages of b -hadron, c -hadron, and τ -lepton properties as of 2021

Abstract

This paper reports world averages of measurements of b-hadron, c-hadron, and τ-lepton properties obtained by the Heavy Flavor Averaging Group using results available before April 2021. In rare cases, significant results obtained several months later are also used. For the averaging, common input parameters used in the various analyses are adjusted (rescaled) to common values, and known correlations are taken into account. The averages include branching fractions, lifetimes, neutral meson mixing parameters, CP violation parameters, parameters of semileptonic decays, and Cabibbo-Kobayashi-Maskawa matrix elements.97 MoreReceived 25 June 2022Accepted 20 September 2022DOI:https://doi.org/10.1103/PhysRevD.107.052008Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.Published by the American Physical SocietyPhysics Subject Headings (PhySH)Research AreasBound statesChiral perturbation theoryElectroweak interactionFlavor changing neutral currentsForm factorsHadron mixingLattice QCDParticle decaysParticle interactionsParticle mixing & oscillationsQuark mixingParticles & Fields