First observation of tau neutrino

by Kimio NIWA (Nagoya university)

Tuesday 19 Sept 2000, 16:30 → 16:45 Europe/Zurich

500/1-001 - Main Auditorium (CERN)

The DONUT beam dump experiment at FNAL has obtained direct evidence for tau neutrinos. A total of 3.6 x 10 ¹⁷ protons of 800 MeV energy were dumped into a tungsten target to produce an intense neutrino beam. This beam is expected to contain tau neutrinos with enough energy to produce a taulepton after collision with a nucleon. The neutrino beam crossed the Emulsion Cloud Chamber and a few interacted to produce tau leptons. The trace of tau leptons was recorded on emulsion films, which were subsequently measured by an automatic readout system. A total of 203 neutrino collisions were analysed and 5 events with short-lived particles are identified as tau neutrino interactions.

Organiser(s): Jasper Kirkby / EP Division

Note: Tea & coffee will be served at 16.00 hrs.