Flavor Phenomenology of the Leptoquark Singlet-Triplet Model

Understand

In recent years, experiments revealed intriguing hints for new physics (NP) in semi-leptonic $B$ decays.

• Both in charged current processes, involving $b \to c \tau \nu$ transitions, and in the neutral currents $b\to s\ell^+\ell^-$, a preference for NP compared to the standard model (SM) of more that $3\sigma$ and $5\sigma$ was found, respectively.
• In addition, there is the long-standing tension between the theory prediction and the measurement of the anomalous magnetic moment (AMM) of the muon ($a_\mu$) of more than $3\sigma$.
• Since all these observables are related to the violation of lepton flavor universality (LFU), a common NP explanation seems not only plausible but is even desirable.