Richard C. Slansky (3 April 1940 – 16 January 1998) was an American theoretical physicist.
As a post-doc he was at Caltech and then for five years at Yale University, before he joined in 1974 the newly founded theory group for particle physics at Los Alamos National Laboratory under Peter A. Carruthers.
Slansky worked on Grand Unified Theories (GUTs).
His monograph "Group theory for unified model building"[1] was well known and widely used by GUT theorists.
He gained international recognition for his work on the applications of group theory to GUTs, published 85 scientific papers, and served as editor of the journal Physics Reports.