Speaker
Luigi Marchese
(ETH Zürich)
Description
New physics can manifest itself via lepton-flavour-universality-violating (LFUV) processes in LHC proton-proton collisions. In this talk I will discuss the first measurement testing LFUV between tau-leptons and muons with the CMS detector using Bc mesons. In more detail, I will present the measurement of the ratio of the branching fractions R(J/Ψ) = Bc→J/Ψ(μμ)τν / Bc→J/Ψ(μμ)μν using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the CMS experiment in 2018. This result was recently published and demonstrated the CMS potential for LFUV measurements with B mesons.
[in person]
Primary author
Luigi Marchese
(ETH Zürich)