Interior of the Projectile Spectator Detector (PSD) used in the NA61/SHINE experiment at CERN. Credit: Julien Marius Ordan, CERN, CC-BY-4.0

Kaon Anomaly Breaks Flavor Symmetry at CERN’s NA61 Experiment

The NA61/SHINE experiment at CERN discovered an unexpected 18% overproduction of charged kaons in high-energy collisions between argon and scandium nuclei, challenging the fundamental assumption of flavor symmetry in particle physics and potentially pointing to new physics beyond the Standard Model.

CERN’s ATLAS: Evidence of a rare Higgs boson decay

CERN’s ATLAS: Evidence of a rare Higgs boson decay

CERN’s ATLAS has found first evidence of the Higgs Boson decaying to two leptons (either an electron or a muon pair with opposite charge) and a photon. Known as “Dalitz decay”, this is one of the rarest Higgs boson decays yet seen at the LHC.