Towards New Frontiers in Precision B Physics: Theoretical Challenges and Perspectives

par Robert Fleischer (Nikhef and Vrije Universiteit Amsterdam)

lundi 17 juin 2013, 14:00 → 15:00 Europe/Paris

Amphithéâtre (CPPM)

Thanks to the impressive operation of the LHCb experiment and theoretical progress we are able to perform increasingly stringent tests of the quark-flavour sector of the Standard Model through decays of B mesons, thereby complementing the search for new-physics particles at the ATLAS and CMS detectors. The key target of B-physics studies in this decade is the system of the B0_s mesons, which offers various probes of physics beyond the Standard Model. After giving an introduction into this line of research, I will focus on two of the most promising decay channels: B0_s -> J/psi phi, which sheds new light on CP violation, and the rare decay B0_s -> mu+ mu-, which has recently emerged as a first 3.5 sigma signal in the LHCb data with a branching ratio at the 10^-9 level. I will emphasize the impact of penguin topologies on the CP-violating effects in B0_s -> J/psi phi, which may mimic new-physics contributions but can be controlled through other decay processes, and will highlight newly proposed observables of the B0_s -> mu+ mu- decay, with illustrations in specific models for physics beyond the Standard Model. These analyses offer new perspectives for the future LHCb upgrade.

Transparents Fleischer.pdf