The exotic particles that could finally break the Standard Model

An engineer works on equipment for the LHCb experiment inside the tunnel of the Large Hadron Collider. Credit: Francis Demange/Gamma-Rapho via Getty 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, such as the existence of dark matter. But observations continue to confirm the model’s accuracy with ever greater precision. …