The K⁺ → π⁺νν̅ decay is a highly suppressed flavor-changing neutral current dominated by short distance dynamics. The predicted Standard Model (SM) branching ratio is (8.4 ± 1.0) × 10-11. Given its properties, this process is often called a "golden mode" for New Physics searches.
The CERN SPS NA62 experiment has now achieved a signal significance above five sigmas. The branching ratio...
We now have over a decade of high energy neutrino data from the IceCube telescope at the South Pole. These neutrinos convey information about their sources, propagation, and interaction via directional, energy, and flavour. I will discuss what we can learn about the flavour composition of these events with current and future telescopes, and what flavour can tell us about neutrino sources and...
Rare nuclear transitions are well suited to explore weakly-coupled New Physics and portals into the dark sector at the MeV-scale. In this talk the so-called X-17 Anomaly will be discussed, which is a significant discrepancy reported by the ATOMKI collaboration in the observation of decays of excited 8Be, 4He and 12C nuclei to their ground states via internal e+e- pair creation. The anomaly,...
