Tau
τRareReal particle, observed in experiments
Fact from the codex
The heaviest lepton, almost twice as heavy as a proton, created in pairs with the antitau. Decays after about 0.3 trillionths of a second.
Data
- Appears from ring
- Ring 1 · LHC ring
- Rarity
- Rare
- Mass
- 1.777 GeV
- Threshold
- 3.554 GeV
- Base rate
- 2 %
- Boosted by
- Vertex detector
- Resonance
- Tunable as a resonance from ring 7
- Source
- PDG 2026, Review of Particle Physics, Summary Tables (pdg.lbl.gov/2026)
27 km circumference
pair production, 2 × mass
per collision, before threshold factor and detector boost
×1.12 frequency per level (+12 %)
