The exotic particles that could finally break the Standard Model

Physicists know that their elegant theoretical description of forces and particles — the Standard Model — must be incomplete, because there are a host of phenomena it cannot explain. But observations continue to confirm the model’s accuracy with ever greater precision. Thank goodness an analysis from an experiment at the Large Hadron Collider at CERN, Europe’s particle physics laboratory, suggests at least one way out: the decay of particles called B meson. A new analysis found that the angle at which the final products emerge from the decay disagree with those predicted by the Standard Model. Evidence for this anomaly has been growing since 2015.