Seminario_CA

Title: "Search for new physics:  Measurement of properties of Bs →μ+μ− decays and search for Bd →μ+μ− with the CMS experiment"

 Abstract: Leptonic B meson decays offer excellent opportunities to perform precision tests of the standard model (SM) of particle physics because of minimal hadronic uncertainties in the theoretical predictions.
In this seminar, we will talk about the search for new physics using rare decays. Results are reported for the Bs→μ+μ− branching fraction and effective lifetime and from a search for the decay Bd→μ+μ−. The analysis uses a data sample of proton-proton collisions accumulated by the CMS experiment in 2011, 2012, and 2016, with center-of-mass energies (integrated luminosities) of 7 TeV (5 fb−1), 8 TeV (20 fb−1), and 13 TeV (36 fb−1). The branching fractions are determined by measuring event yields relative to B+→J/ψK+ decays (with J/ψ→μ+μ−), which results in the reduction of many of the systematic uncertainties.
 
https://cern.zoom.us/j/8839979467