UC San Diego

As a preview to the conference I first make a brief account of the methods that are used by theorists in the context of Kaon physics. I then make two modest observations. First, that looking at non-Kaon physics may shed light on Kaon physics. As a case in point I argue that one can empirically find analogues of the ΔI = 1/2 rule in both D and B decays to two pseudoscalars. And second, that while in tests of fundamental principles the scale of putative new physics is often unknown a priori, there are some cases where it is known. As an example I discuss tests of Lorentz invariance and argue that, in the context of Doubly Special Relativity, the K0 - K̄0 mass difference is already sensitive to Planck scale effects. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution- NonCommercial-ShareAlike Licence.