Tensions in the flavour sector

TL;DR

This paper reviews current tensions in flavour physics, highlighting discrepancies in rare B decays, lepton universality ratios, and CKM element determinations, which may indicate new physics beyond the Standard Model.

Contribution

It provides a concise summary of the latest experimental tensions in flavour physics and discusses their potential implications for new physics models.

Findings

Discrepancies in rare semi-leptonic B decays

Anomalies in R_K and R_D* ratios suggest possible lepton universality violation

Long-standing tension in |V_cb| and |V_ub| determinations

Abstract

Flavour physics is currently well described by the Standard Model except for some measurements which could be signalling new physics. We briefly summarize the status of tensions in rare exclusive semi-leptonic $B$ decays and in $R_{K/D^{(\ast)}}$ ratios. We also address the issue of the long standing tension in the $|V_{cb}|$ and $|V_{ub}|$ exclusive/inclusive determinations.