Computer display of a "3+1" tau decay in the TASSO detector at the DESY particle physics laboratory,Hamburg. The small circle at centre represents the beam pipe in which an electron & a positron,accelerated in DESY's PETRA collider,have met & annihilated at the heart of the detector. Their energy materialises as a tau particle & an antitau which live too briefly to be visible themselves,but reveal their presence when they decay,the tau to 2 invisible neutrinos & a positive muon (single track),& the antitau to 3 three charged pions (3 tracks) & an invisible neutrino. The tau is a lep- ton,a heavy version of the electron & the muon | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / OXFORD NUCLEAR PHYSICS LABORATORY / TASSO EXPERIMENT, DESY |
Taille de l’image : | 4756 px × 3756 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |