Marcel Froissart

Marcel Froissart (20 December 1934, 6th arrondissement of Paris – 21 October 2015, 14th arrondissement of Paris) was a French theoretical physicist, specializing in particle physics. He is known for the Froissart bound and the Froissart–Stora equation.

Biography After secondary study at the Lycée Louis-le-Grand, Marcel Froissart matriculated in 1953 at the École polytechnique, where he graduated in 1955. He then entered in October 1956 Mines ParisTech, now known as École nationale supérieure des mines de Paris (Mines Paris - PSL). After completing only one semester of a four-semester technical curriculum, he was sent in civil cooperation with the French Navy to Algeria (during the Algerian War, which lasted from 1954 to 1962). He was reassigned in 1957 to the Commissariat à l'énergie atomique (CEA), for which he worked in Geneva from 1957 to 1958 at CERN. Again in civil cooperation with the French military, he was reassigned to work at the University of Algeria from 1958 to 1959. At Princeton University, he held temporary positions for the academic years 1961–1962 and 1965–1966.

In 1964 Froissart received the Prix Paul Langevin awarded by the Société Française de Physique (SFP) . He contributed to the 13th International Conference on High-Energy Physics held in Berkeley from the 1st of August to the 7th of September 1966. In January 1967 his paper with John R. Taylor was published. In October 1967 in Brussels, Froissart was an invited participant at the 14th Solvay Conference. In 1973 he was appointed a professor at the Collège de France in the particle physics chair, which he held until he retired as professor emeritus in 2004.

Froissart, as laboratory director, found himself at the center of a controversy over the rubbiatron. He was one of the main developers of the Groupement des scientifiques pour l'information sur l'énergie nucléaire (GSIEN, Association of Scientists for Information on Nuclear Energy).

The famous photographer Martine Franck made a portrait of Froissart. Marcel Froissart was a grandson of the glassmaker and a nephew of , who was in the 1930s one of the designers of the wooden construction technique called froissartage.

Upon his death in 2015, Marcel Froissart was survived by his widow, 3 sons, 2 daughters, and 10 grandchildren. Research of a possible axiomatic justification of the Mandelstam representation Generalization of Bell's inequalities to various systems Research on the application of the theory of analytic functions to the localization of a point on a plane surface (Patent 1988) Studies of various properties of light mesons

Selected publications

Texts on line 1970 : Modèles théoriques, basse énergie, Le Journal de physique, vol. 31, no. C5 (novembre-décembre), pp. C5-88 1974 - 2004 : Cours publics et rapports de Marcel Froissart , Collège de France (Chaire de physique corpusculaire)

Patent 1988 : A device for two-dimensional localization of current-generating events on a resistive surface, U.S. patent US4788384A (in collaboration with Roger Bruère-Dawson, Bernard M. Maréchal et Marcio N. DeSouza)