Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 50: Eingeladene Vorträge IV

T 50.1: Semi-Invited Talk

Wednesday, March 27, 2019, 14:00–14:30, H03

Electroweak penguins and the search for new physics — •Eluned Smith — RWTH Aachen

Electroweak penguin (EWP) decays are Flavour Changing Neutral Currents mediated via loop or box diagrams. As such, they are suppressed in the Standard Model (SM) and sensitive to effects from new heavy particles (New Physics).

There has been increasing interest in EWP decays of b-hadrons, due to the emergence of several intriguing tensions between measured observables and SM predictions. Of particular interest are measurements of decay rates and angular observables, as well as lepton flavour universality tests, where clean SM predictions are available. The tensions in this area, which are at the level of 2-3 standard deviations (σ), constitute part of the so-called flavour anomalies.

This talk will give an overview of the recent most relevant analyses of EWP b-hadron decays, with focus on results from the LHCb experiment. Possible theoretical interpretations of the anomalies will also briefly be discussed.