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Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2018

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arxiv 1909.12524 v3 pith:L3GC332M submitted 2019-09-27 hep-ex

Heavy Flavor Averaging Group (HFLAV) , Y. Amhis , Sw. Banerjee , E. Ben-Haim , F. U. Bernlochner , M. Bona , A. Bozek , C. Bozzi
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J. Brodzicka M. Chrzaszcz J. Dingfelder S. Duell U. Egede M. Gersabeck T. Gershon P. Goldenzweig K. Hayasaka H. Hayashii D. Johnson M. Kenzie T. Kuhr O. Leroy H.-B. Li A. Lusiani H.-L. Ma K. Miyabayashi P. Naik T. Nanut M. Patel A. Pompili M. Rama M. Roney M. Rotondo O. Schneider C. Schwanda A. J. Schwartz B. Shwartz J. Serrano A. Soffer D. Tonelli P. Urquijo R. Van Kooten J. Yelton
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keywords hadronparametersaveragesaveragingcommonleptonobtainedproperties
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abstract

This paper reports world averages of measurements of $b$-hadron, $c$-hadron, and $\tau$-lepton properties obtained by the Heavy Flavor Averaging Group using results available through September 2018. 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.

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