Keijo Kajantie

Keijo Olavi Kajantie (born 1940) is a Finnish theoretical physicist and Professor and Adjoint Scientist at the Helsinki Institute of Physics. He was Professor of Physics at the University of Helsinki from 1973 to 2008. and he has worked in the CERN Theory Division. He is best known for his contributions to the study of the electroweak and strong interactions at high temperatures, as well as to the field of ultrarelativistic nuclear collisions. His research interests include ultrarelativistic nuclear collisions, finite temperature field theory, string theory and QCD matter, cosmological phase transitions and null infinity in general relativity. and the Order of the Lion of Finland in 2012.