B0(s) → μ+μ- combination at the LHC

International Workshop on Discovery Physics at the LHC

Schlupp, Maximilian^1,1

Department of Physics, Technische Universität Dortmund, Otto-Hahn-Str 4, Dortmund

44227, Germany^1

关键词: Branching fractions;    Combined analysis;    Meson decays;    Precise measurements;    Statistical significance;    The standard model;    Total uncertainties;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/623/1/012025/pdf
DOI  :  10.1088/1742-6596/623/1/012025

来源: IOP

【 摘 要 】

The combined analysis of the Bs0and B0meson decays into two muons based on the full CMS and LHCb datasets is presented. The simultaneous fit to the datasets yields the most precise measurement of the branching fractions to date with a total uncertainty of about 23% for the Bs0meson and 38% for the B0decay into two muons. The measured branching fractions are compatible with the Standard Model predictions within 1.2σ and 2.2σ for the Bs0and B0signals, respectively. The statistical significance for the Bs0signal is 6.2σ and 3.2σ for the B0signal. This results in the first observation of Bs0meson decays into two muons and the first evidence for the B0sister decay.