Precision measurements of CP violating observables in the decays of b and c hadrons are powerful probes to search for physics beyond the Standard Model.
The most recent results on CP violation in the decay, mixing and interference of both b and c hadrons obtained by the LHCb Collaboration with Run I and years 2015-2016 of Run II are reviewed. In particular world best constraints and world...
The concept of lepton universality, where the muon and tau particles are simply heavier copies of the electron, is a key prediction in the Standard Model (SM). In models beyond the SM, lepton universality can be naturally violated with new physics particles that couple preferentially to the second and third generation leptons. Over the last few years, several hints of lepton universality...
The angular analysis of the decay of Bd -> K* mu mu for a number of angular coefficients are measured as a function of the invariant mass squared of the di-muon system for data collected at 8 TeV. Comparison is made to theoretical predictions, including for the observable P’5, for which there has been recent tension between theory and experiment. In addition the study of kinematical...
Electroweak penguin B decays proceed through one loop diagrams at the lowest order. Since new particles beyond the Standard Model can enter in the loop, these processes are very sensitive to new physics. We report measurements of b → sl+l- decays at Belle. We also report other rare B decays sensitive to New Physics. The analyses are based on the full data set at Y(4S) and Y(5S) resonances at Belle.
Flavor-changing neutral-current (FCNC) decays of the $B$ and $D$ mesons are strongly suppressed in the Standard Model (SM) because they cannot be produced at tree level, and occur first at one-loop level. Therefore, they are sensitive probes for contributions beyond the SM, as heavy mediator can also occur in these loop processes. The analyses presented here are based on the entire dataset...
