NUCLEAR & PARTICLE PHYSICS · INTERACTIVE LAB 74

Particle Accelerator Collision

Accelerate opposing beams, trigger a collision and reconstruct the evidence recorded by a layered detector.

Proton–proton collisionBeams circulating

Charged trackPhoton / EM depositHadron / jetMuonMissing momentum

Beam energy6.5 TeV*

Centre-of-mass13.0 TeV*

Produced particles0

Visible energy0 GeV*

Missing pₜ0 GeV/c*

Net charge0e

Energy by detector layer

Particle energy distribution

Event preset Beam particles Beam energy 6.5 TeV*Particles per bunch 24Beam focus 86%Beam alignment 96%Magnetic field 2.0 T*Event complexity 55%Simulation speed 1.0×Random seed

*Simplified teaching values and representative event patterns—not precision collider, detector, engineering or radiation-safety software.

Select a trackClick or tap a particle trail in detector view to inspect its modelled identity and detector response.

EnergyWaiting for event

MomentumWaiting for event

Electric chargeWaiting for event

Event particle summary

Particle	Charge	Energy*	Momentum*	Detector response
Trigger a collision to generate an event.

From fields to collisions

Electric fields add energy to charged particles. Magnetic fields steer and focus them. Opposing beams concentrate their centre-of-mass energy at a tiny interaction point.

Reading an event

Curved inner tracks reveal charge and momentum. Electrons and photons stop in the electromagnetic calorimeter, hadrons shower deeper, while muons reach the outer system.

Invisible evidence

Neutrinos leave no direct signal. Physicists infer them from an imbalance in transverse momentum—the vector sum of what the detector did observe.

Model limitation: Events use seeded educational probabilities, not real cross-sections or full quantum field theory. Higgs-like, W-like, Z-like and top-like displays are representative patterns only.