Testing the origin of the [formula omitted] rule through K L dalitz decays

Abstract

It is pointed out that the process KrmK L → ℓ +ℓ − γ has some specific properties making it a useful tool to study the structure of the weak non-leptonic interaction. In particular, it is demonstrated how the scheme using penguin diagrams to enhance the K- π transition may experimentally be distinguished from, e.g., Sakurai's phenomenological hamiltonian model through a measurement of the ratio Γ(K L → e +e − γ )/ Γ(K L → μ + μ − γ) .