Studies of lepton flavour universality in B meson decays at LHCb

Stage numéro : Doctorat-1922-LH-01
Laboratoire :Centre de Physique des Particules de Marseille Case 902
 163 avenue de Luminy - 13288 Marseille Cedex 9
Directeur :Cristinel Diaconu - 04.91.82.72.01 - diaconu@cppm.in2p3.fr
Correspondant :William Gillard - 04.91.82.72.67 - gillard@cppm.in2p3.fr
Groupe d'accueil :LHCb
Chef de groupe :Olivier leroy - 04.91.82.76.05 - oleroy@cppm.in2p3.fr
Directeur de thèse :Anton Poluektov - 0491827602 - poluektov@cppm.in2p3.fr

Thématique : Physique des particules

Hints on violation of lepton flavour universality seen in the studies of B meson decays are some of the strongest evidences for the effects of physics beyond the Standard Model of electroweak interactions. The LHCb group at CPPM has been actively involved in these studies.

The candidate will join the LHCb experiment at the LHC collider at CERN and will play an active role in the programme of lepton flavour universality tests with semitauonic beauty hadron decays at LHCb.

During the PhD project, the candidate will carry out the analysis of the structure of multibody decays of B mesons to the final states containing two charmed mesons. The study will provide an important input to the analysis of semitauonic B decays, where doubly charmed B decays constitute a significant background. It will also serve as a testbed for innovative analysis approaches using novel machine learning techniques. In addition, the candidate will participate in the development of particle identification calibration techniques, both with the currently available LHCb data and for the LHCb upgrade as a part of our involvement in the Real-Time Analysis project (RTA).