Val Logsdon Fitch

Val Logsdon Fitch
Born(1923-03-10)March 10, 1923
DiedFebruary 5, 2015(2015-02-05) (aged 91)
EducationChadron State College
Northwestern University
Carnegie Mellon University
McGill University (BS)
Columbia University (MS, PhD)
Known forDiscovery of CP-violation
AwardsE. O. Lawrence Award (1968)
John Price Wetherill Medal (1976)
Nobel Prize in Physics (1980)
National Medal of Science (1993)
Scientific career
FieldsParticle physics
Institutions
Thesis Studies of X-rays from Mu-Mesonic Atoms  (1954)
Doctoral advisorJames Rainwater

Val Logsdon Fitch (March 10, 1923 – February 5, 2015) was an American nuclear physicist who, with co-researcher James Cronin, was awarded the 1980 Nobel Prize in Physics for a 1964 experiment using the Alternating Gradient Synchrotron at Brookhaven National Laboratory that proved that certain subatomic reactions do not adhere to fundamental symmetry principles. Specifically, they proved, by examining the decay of K-mesons, that a reaction run in reverse does not retrace the path of the original reaction, which showed that the reactions of subatomic particles are not indifferent to time. Thus the phenomenon of CP violation was discovered. This demolished the faith that physicists had that natural laws were governed by symmetry.

Born on a cattle ranch near Merriman, Nebraska, Fitch was drafted into the U.S. Army during World War II, and worked on the Manhattan Project at the Los Alamos Laboratory in New Mexico. He later graduated from McGill University, and completed his PhD in physics in 1954 at Columbia University. He was a member of the faculty at Princeton University from 1954 until his retirement in 2005.