# Measurement of Strangely Beautiful Dimuons at CMS

Kai-Feng Chen
(Experimental High Energy Physics CMS Experiment at CERN, Geneva, Switzerland)

The measurement of the Bs to mu+mu- branching fraction and effective lifetime, and a search for the decay B0 to mu+mu- will be presented.
The analysis uses a data sample of pp collisions accumulated by the CMS experiment during LHC Run-1 and 2016. The branching fractions are determined by measuring the event yields relative to B+ to J/psi K+ decays with a reduction of the systematic uncertainties.
The decay Bs to mu+mu- has reached 5 sigma discovery significance, and the associated effective lifetime has been measured for the first time at CMS.

Yer     : MSGSÜ Bomonti Binası, Fizik Bölümü
Tarih : 12 Kasım 2019 Salı, 15:00