Particle Theory Seminar - Lepton Flavour Universality Violation: new hints from the Cabibbo Angle Anomaly? - Claudio Andrea Manzari, Univesity of Zurich

1:30 pm VIA ZOOM

Lepton Flavour Universality Violation: new hints from the Cabibbo Angle Anomaly?

In recent years, a pattern of deviations with respect to Standard Model (SM) predictions has manifested in the context of Lepton Flavour Universality. These includes measurements of semi-leptonic B decays, the anomalous magnetic moments of the muon and ratios of lepton decay rates.
Lately, a deficit with a significance around the 3�� level, known as the ”Cabibbo Angle Anomaly” (CAA), emerged in first row CKM unitarity. Moving from the observations above, it has been shown that this anomaly can be interpreted as an additional indication of Lepton Flavour Universality Violation (LFUV), complementing the already interesting pattern of anomalies. After reviewing the origin and the status of the CAA, I discuss the various possibilities to explain it via physics beyond Standard Model. Eventually, I focus on models featuring correlations with other hints for LFUV such as ����ℓℓ and ��������, resulting in interesting predictions to be tested experimentally in the near future. 

Event Type

Seminars

Dec 1