Résumé:
Rare leptonic B meson decays are among the most powerful probes to search for physics beyond the Standard Model. Indeed their branching ratios are precisely predicted in the standard model and could be largely modified in presence of new physics particles. The work presented here focuses on the search for B_(s) -> mu+ mu- and B_(s) -> tau+tau- decays with the data collected by the LHCb experiment during the first run of the LHC.
Jury:
Sébastien Descote-Genon
Cristinel Diaconu
Francesco Forti
Tim Gershon
Francois Le Diberder
Lydia Roos