DPF - PHENO 2024

Anomalies in Hadronic B Decays

16 May 2024, 14:45

15m

David Lawrence Hall 104 (University of Pittsburgh)

Quark and Lepton Flavor Physics Quark and Lepton Flavor Physics

Speaker

Alexandre Jean (Université de Montréal)

Description

The amplitudes of $B\to PP$ decays, where $P$ is a pion or a kaon, are related by flavour $SU(3)$ ($SU(3{)}_F$). This allows us to describe all observables for these decays in terms of $SU(3{)}_F$ reduced matrix elements parametrized by diagrams. Using these parameters, we performed a fit to the experimental data, and found a discrepancy at the level of 3.6$\sigma$. This discrepancy can be resolved by adding $SU(3{)}_F$-breaking effects, but these effects are required to be very large, of the order of 1000%. When we add an assumption based on QCD factorization to the fit, the discrepancy jumps to 4.4$\sigma$. These are the anomalies in hadronic B decays; they strongly hint at the presence of new physics.

Presentation materials

Anomalies_DPF_PHENO.pdf