Jack Steinberger

Research has been devoted to the study of the properties of elementary particles and their interactions. Except for an early theoretical paper, and his thesis experiment which used cosmic rays, it was based on the use of accelerators of increasingly high energy, as they became available, to study the properties of '48 mu mesons, '49-'56 pi mesons, '56-'64 strange particles, '62 neutrinos, '65-'75 and '82-'87 CP violation, '76-83 nucleon structure using neutrinos, and finally learning about the electro-weak interaction and Z bosons using the electron-position collider LEP. These experiments contributed to the discovery of three particles: the neutral pion, the E hyperon and the muon neutrino, to our understanding of the properties of pions, of the phenomena of interference, time reversal violation and direct CP violation in CP violation in K decay, to a first confirmation, using deep inelastic scattering of neutrinos, of the validity of the QCD theory of the strong interaction, and to the demonstrations that there are just three families of fermions.