Photon

γCommonReal particle, observed in experiments

Fact from the codex

Massless and always moving at the speed of light. Carries the electromagnetic force.

Appears from ring: Ring 1 · LHC ring
Rarity: Common
Mass: massless
Threshold: always
Base rate: 100 %
Boosted by: no sub-detector
Source: PDG 2026, Review of Particle Physics, Summary Tables (pdg.lbl.gov/2026)