Giampetro Puppi (20 November 1917 – 25 December 2006)[1] was an Italian physicist who is known for his contribution to the theory of weak interactions.
He graduated in 1939 and with the end of World War II, Puppi started to work in Italian Universities (Bari, Rome, Padua).
[2] He started his career as a theoretical physicist, but soon he gave in to experimental physics and the field of cosmic-rays.
His discovery 'Puppi's triangle',[3] which represents the three processes of beta decay, muon decay and muon capture in nuclei, was the recognition to precursor's Enrico Fermi theory of interactions (Fermi's interactions) that all weak processes could be described by the same coupling.
[4] Due to lack of equipment in Europe and in order to satisfy his interest in experimental physics, Puppi together with Italian and American physicists had been using the University of Columbia and University of Chicago as their base to conduct experiments while the analysis was done in Italy.