Light Scalars and the Koto Anomaly
Daniel Egaña-Ugrinovic, Samuel Homiller, Patrick Meade
Abstract
We show that the recent excess presented by KOTO in their search for K_{L}→π^{0}νν[over ¯] may be due to weakly coupled scalars produced from Kaon decays. We study two concrete realizations, the minimal Higgs portal and a hadrophilic scalar model, and demonstrate that they can explain the observed events while satisfying existing limits. The simplicity of these models, and their possible relations to interesting UV constructions, provides strong theoretical motivation for a new physics interpretation of the KOTO data.
Topics & Concepts
PhysicsScalar (mathematics)Particle physicsAnomaly (physics)Interpretation (philosophy)Higgs bosonTheoretical physicsPhysics beyond the Standard ModelSimplicityQuantum mechanicsComputer scienceGeometryMathematicsProgramming languageParticle physics theoretical and experimental studiesDark Matter and Cosmic PhenomenaQuantum Chromodynamics and Particle Interactions