Speaker
Francesco Giacosa
(Jan Kochanowski University)
Description
In this talk, I review recent theoretical efforts to understand the excess of charged over neutral kaons measured by the NA61/SHINE collaboration. This excess signals a much larger breaking of isospin symmetry than expected. In particular, the results of hadron resonance gas approach(es) and of the UrQM simulation, as well as considerations involving the electromagnetic interaction and the chiral (or axial) anomaly in QCD will be presented. In the end, the consequences of isospin breaking for other hadrons and future model improvements will be briefly summarized.
