Abstract

This paper reports world averages of measurements of b-hadron, c-hadron, and τ-lepton properties obtained by the Heavy Flavour 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.

Details

Title
Averages of b-hadron, c-hadron, and τ-lepton properties as of 2018
Author
Amhis, Y 1   VIAFID ORCID Logo  ; Banerjee Sw 2   VIAFID ORCID Logo  ; Ben-Haim, E 3   VIAFID ORCID Logo  ; Bernlochner, F U 4 ; Bona, M 5   VIAFID ORCID Logo  ; Bozek, A 6   VIAFID ORCID Logo  ; Bozzi, C 7   VIAFID ORCID Logo  ; Brodzicka, J 6 ; Chrzaszcz, M 6 ; Dingfelder, J 4 ; Duell, S 4 ; Egede, U 8   VIAFID ORCID Logo  ; Gersabeck, M 9   VIAFID ORCID Logo  ; Gershon, T 10   VIAFID ORCID Logo  ; Goldenzweig, P 11 ; Hayasaka, K 12   VIAFID ORCID Logo  ; Hayashii, H 13 ; Johnson, D 14   VIAFID ORCID Logo  ; Kenzie, M 10   VIAFID ORCID Logo  ; Kuhr, T 15   VIAFID ORCID Logo  ; Leroy, O 16   VIAFID ORCID Logo  ; H-B, Li 17 ; Lusiani, A 18   VIAFID ORCID Logo  ; H-L, Ma 19 ; Miyabayashi, K 13 ; Naik, P 20   VIAFID ORCID Logo  ; Nanut, T 21 ; Patel, M 22 ; Pompili, A 23 ; Rama, M 24 ; Roney, M 25   VIAFID ORCID Logo  ; Rotondo, M 26   VIAFID ORCID Logo  ; Schneider, O 21   VIAFID ORCID Logo  ; Schwanda, C 27   VIAFID ORCID Logo  ; Schwartz, A J 28 ; Shwartz, B 29 ; Serrano, J 16 ; Soffer, A 30   VIAFID ORCID Logo  ; Tonelli, D 31   VIAFID ORCID Logo  ; Urquijo, P 32 ; Van Kooten R 33 ; Yelton, J 34 

1  Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France (GRID:grid.508754.b) 
2  University of Louisville, Louisville, USA (GRID:grid.266623.5) (ISNI:0000 0001 2113 1622) 
3  LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France (GRID:grid.463935.e) (ISNI:0000 0000 9463 7096) 
4  University of Bonn, Bonn, Germany (GRID:grid.10388.32) (ISNI:0000 0001 2240 3300) 
5  Queen Mary University of London, School of Physics and Astronomy, London, UK (GRID:grid.4868.2) (ISNI:0000 0001 2171 1133) 
6  H. Niewodniczanski Institute of Nuclear Physics, Kraków, Poland (GRID:grid.418860.3) (ISNI:0000 0001 0942 8941) 
7  INFN Sezione di Ferrara, Ferrara, Italy (GRID:grid.470200.1) (ISNI:0000 0004 1765 4414) 
8  Monash University, School of Physics and Astronomy, Melbourne, Australia (GRID:grid.1002.3) (ISNI:0000 0004 1936 7857) 
9  University of Manchester, School of Physics and Astronomy, Manchester, UK (GRID:grid.5379.8) (ISNI:0000000121662407) 
10  University of Warwick, Department of Physics, Coventry, UK (GRID:grid.7372.1) (ISNI:0000 0000 8809 1613) 
11  Karlsruher Institut für Technologie, Institut für Experimentelle Teilchenphysik, Karlsruhe, Germany (GRID:grid.7892.4) (ISNI:0000 0001 0075 5874) 
12  Niigata University, Niigata, Japan (GRID:grid.260975.f) (ISNI:0000 0001 0671 5144) 
13  Nara Women’s University, Nara, Japan (GRID:grid.174568.9) (ISNI:0000 0001 0059 3836) 
14  European Organization for Nuclear Research (CERN), Geneva, Switzerland (GRID:grid.9132.9) (ISNI:0000 0001 2156 142X) 
15  Ludwig-Maximilians-University, Munich, Germany (GRID:grid.5252.0) (ISNI:0000 0004 1936 973X) 
16  Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France (GRID:grid.470046.1) (ISNI:0000 0004 0452 0652) 
17  Institute of High Energy Physics, Beijing, People’s Republic of China (GRID:grid.418741.f) (ISNI:0000 0004 0632 3097); University of Chinese Academy of Sciences, Beijing, People’s Republic of China (GRID:grid.410726.6) (ISNI:0000 0004 1797 8419) 
18  Scuola Normale Superiore, Pisa, Italy (GRID:grid.6093.c); INFN Sezione di Pisa, Pisa, Italy (GRID:grid.470216.6) 
19  Institute of High Energy Physics, Beijing, People’s Republic of China (GRID:grid.418741.f) (ISNI:0000 0004 0632 3097) 
20  University of Bristol, H.H. Wills Physics Laboratory, Bristol, UK (GRID:grid.5337.2) (ISNI:0000 0004 1936 7603) 
21  Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute of Physics, Lausanne, Switzerland (GRID:grid.5333.6) (ISNI:0000000121839049) 
22  Imperial College London, London, UK (GRID:grid.7445.2) (ISNI:0000 0001 2113 8111) 
23  Università di Bari Aldo Moro, Bari, Italy (GRID:grid.7644.1) (ISNI:0000 0001 0120 3326); INFN Sezione di Bari, Bari, Italy (GRID:grid.470190.b) 
24  INFN Sezione di Pisa, Pisa, Italy (GRID:grid.470216.6) 
25  University of Victoria, Victoria, Canada (GRID:grid.143640.4) (ISNI:0000 0004 1936 9465) 
26  Laboratori Nazionali dell’INFN di Frascati, Frascati, Italy (GRID:grid.463190.9) (ISNI:0000 0004 0648 0236) 
27  Institute of High Energy Physics, Vienna, Austria (GRID:grid.450258.e) (ISNI:0000 0004 0625 7405) 
28  University of Cincinnati, Cincinnati, USA (GRID:grid.24827.3b) (ISNI:0000 0001 2179 9593) 
29  Budker Institute of Nuclear Physics (SB RAS), Novosibirsk, Russia (GRID:grid.418495.5); Novosibirsk State University, Novosibirsk, Russia (GRID:grid.4605.7) (ISNI:0000000121896553) 
30  Tel Aviv University, Tel Aviv, Israel (GRID:grid.12136.37) (ISNI:0000 0004 1937 0546) 
31  INFN Sezione di Trieste, Trieste, Italy (GRID:grid.470223.0) (ISNI:0000 0004 1760 7175) 
32  University of Melbourne, School of Physics, Melbourne, Australia (GRID:grid.1008.9) (ISNI:0000 0001 2179 088X) 
33  Indiana University, Bloomington, USA (GRID:grid.411377.7) (ISNI:0000 0001 0790 959X) 
34  University of Florida, Gainesville, USA (GRID:grid.15276.37) (ISNI:0000 0004 1936 8091) 
Publication year
2021
Publication date
Mar 2021
Publisher
Springer Nature B.V.
ISSN
14346044
e-ISSN
14346052
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1140/epjc/s10052-020-8156-7
ProQuest document ID
2514176070
Copyright
© The Author(s) 2021. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.