Here’s what you’ll learn when you read this story:Although CERN’s Large Hadron Collider has made a lasting impact on particle physics, it hasn’t yet open up a whole new frontier of particle physics like some scientists expected. Future colliders will likely be able to directly observe the zeptouniverse, but for now, studying these decays could help us find new physics within the decade. One example of such a decay starts with the B meson—a kind of composite particle made of different quarks, as Cliff explains. Because this interaction is sensitive to Standard Model deviations, it’s identified as one of the prime targets for finding new physics. Today, the KOTO experiment in Japan is searching for a second confirmation of this kaon decay.