2D Particle Detector: Track Curvature & Particle ID

This 2D companion strips the collider detector down to a single cross-section so the curvature physics is directly readable: a side panel exposes the magnetic field strength, its direction, and a shared beam kinetic energy, then lets you fire a labelled electron, muon or proton track and watch their radii diverge exactly as the real accelerator-physics relation r = p/(0.3·q·B) predicts — same charge, same beam energy, different mass, different momentum, different bend. A second "mystery event" mode fires an unlabelled particle and challenges you to identify it the way a real detector does: read its momentum off the track curvature, combine it with a noisy time-of-flight velocity measurement to reconstruct a mass, and match that against the electron/muon/proton hypotheses — genuine particle-identification kinematics, not a colour-coded guess.