$ b $ -HADRON，$ C $ -HADRON和$τ$ -Lepton Properties的平均值截至2021年

论文标题

$ b $ -HADRON，$ C $ -HADRON和$τ$ -Lepton Properties的平均值截至2021年

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

论文作者

HFLAV Collaboration, Amhis, Y., Banerjee, Sw., Ben-Haim, E., Bertholet, E., Bernlochner, F. U., Bona, M., Bozek, A., Bozzi, C., Brodzicka, J., Chobanova, V., Chrzaszcz, M., Duell, S., Egede, U., Gersabeck, M., Gershon, T., Goldenzweig, P., Hayasaka, K., Johnson, D., Kenzie, M., Kuhr, T., Leroy, O., Lusiani, A., Ma, H. -L., Margoni, M., Miyabayashi, K., Mizuk, R., Naik, P., Petric, T. Nanut, Oyanguren, A., Prim, M. T., Pompili, A., Roney, M., Rotondo, M., Schneider, O., Schwanda, C., Schwartz, A. J., Serrano, J., Soffer, A., Tonelli, D., Urquijo, P., Yelton, J.

论文摘要

本文报告了世界平均$ b $ -HADRON，$ c $ -HADRON和$τ$ -Lepton的房地产的平均值，该物业是由重型风味平均群体获得的，使用2021年4月之前可用的结果。在极少数情况下，还使用了几个月后获得的重大结果。对于平均，将各种分析中使用的共同输入参数调整为公共值（重新定位），并考虑到已知的相关性。平均值包括分支分数，寿命，中性介子混合参数，CP违规参数，半衰减衰减的参数以及Cabibbo-Kobayashi-Maskawa矩阵元素。

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 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.

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