Averages of $b$-hadron, $c$-hadron, and $\ddot{I}„$-lepton properties as of 2023

Abstract

This paper reports world averages of measurements of $b$-hadron, $c$-hadron, and $\ddot{I}„$-lepton properties obtained by the Heavy Flavour Averaging Group using results available before October 2023. 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.

525 pages. Version accepted for publication. arXiv admin note: substantial text overlap with arXiv:2206.07501, arXiv:1909.12524; text overlap with arXiv:1612.07233, arXiv:1412.7515