Speaker
Description
Several anomalies in $b \to s$ transitions have been recently reported
by the LHCb collaboration. These include discrepancies with the Standard Model predictions in some angular observables and branching ratios and three intriguing hints for lepton universality violation in the $R_K$ and $R_{K^\ast}$ ratios. We study the implications of these results using a model-independent approach based on the Standard Model Effective Field Theory (SMEFT), in which the new physics effects are encoded in the coefficients of gauge-invariant dimension-six operators. In particular, we determine the required SMEFT coefficients at low and high energies and identify valid new physics scenarios. With the help of the computer code DsixTools, we also study indirect constraints due to renormalization group effects.
| Presentation type | Parallel talk |
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