Rare K and B decays with non-standard missing energy

TL;DR

This paper explores how rare K and B meson decays into neutrino pairs can serve as sensitive probes for detecting new physics beyond the Standard Model, including potential new invisible particles.

Contribution

It analyzes the potential of these decays to signal new physics in the leptonic sector or reveal entirely new invisible sectors, expanding the scope of rare decay studies.

Findings

Rare K and B decays are highly sensitive to non-standard physics.

These decays can potentially signal new leptonic interactions.

They may reveal entirely new invisible particles or sectors.

Abstract

The rare K and B semileptonic decays into neutrino pairs are well-known to be extremely sensitive to non-standard physics in the quark sector. In this talk, their capabilities to signal New Physics in the leptonic sector, or even to reveal entirely new invisible sectors, are analyzed.