Hirohisa A. Tanaka




  • Ph.D.: Stanford University (2002)
  • A.B.: Harvard University (1997)



  • University of Toronto: 
    • Professor (2016-), Associate Professor (2015)
  • Institute of Particle Physics: 
    • Principal Research Scientist (2015-), Research Scientist (2007-2014)
  • University of British Columbia: 
    • Associate Professor (2012-2015), Assistant Professor (2007-2012)
  • Princeton University: 
    • Research Associate/Scholar (2003-2007)



T2K is a "long baseline neutrino oscillation experiment" where a neutrino beam produced by an accelerator on the east coast of Japan is sent 295 km across the country to the Super-Kamiokande detector on the opposite coast. The neutrino beam starts primarily as muon neutrino (or antineutrino), but during their transit, they can transform to electron or tau (anti)neutrinos via the "neutrino oscillation" process.

T2K established in 2013 that muon neutrinos are transitioning to electron neutrinos,  discovery that was recognized by the 2015 Breakthrough Prize in Fundamental Physics. We are now running in a combination of neutrino and antineutrino 



hyper K

Recent Talks and Presentations:

Some Publications:

  • Review article on neutrinos in  Special Issue of Annalen der Physik "Physics after the Higgs" html, pdf
  • Review article on neutrino scattering in Physics Reports, html, pdf

In the News: