Tōichirō Kinoshita (, '' Kinoshita Tōichirō ''; b. 23 January 1925 in Tokyo) is a Japanese-American theoretical physicist. Kinoshita studied physics at the University of Tokyo, earning his bachelor's degree in 1947 and then his PhD in 1952. Afterwards he spent two years as a postdoctoral researcher of the Institute of Advanced Study, Princeton, New Jersey, and then one year at Columbia University. His research interests include

quantum field theory In theoretical physics, quantum field theory (QFT) is a theoretical framework that combines classical field theory, special relativity, and quantum mechanics. QFT is used in particle physics to construct physical models of subatomic particles and ...

, and the

Standard Model The Standard Model of particle physics is the theory describing three of the four known fundamental forces (electromagnetism, electromagnetic, weak interaction, weak and strong interactions - excluding gravity) in the universe and classifying a ...

.T. Kinoshita
History. American Institute of Physics (AIP). Accessed October 4, 2018. He has been working at Cornell University since 1955. He was at first a research associate. In 1958 he became assistant professor, in 1960 associate professor. He became a full professor in 1963 (starting from 1992 as Goldwin Smith professor) at Newman Laboratory of Nuclear Studies of Cornell University. In 1962-63 he was a Ford Fellow at

CERN The European Organization for Nuclear Research, known as CERN (; ; ), is an intergovernmental organization that operates the largest particle physics laboratory in the world. Established in 1954, it is based in a northwestern suburb of Gene ...

. In 1995 he retired from Cornell as professor emeritus. He was a guest professor at the University of Tokyo, at CERN, and at the national laboratory for high-energy physics

KEK , known as KEK, is a Japanese organization whose purpose is to operate the largest particle physics laboratory in Japan, situated in Tsukuba, Ibaraki prefecture. It was established in 1997. The term "KEK" is also used to refer to the laboratory ...

in Japan. Kinoshita is known for his extensive precision computations of fundamental quantities in quantum electrodynamics. The fundamental quantities involved electroweak theory and corrections related to the

, such as the anomalous magnetic moments of both the electron and the

muon A muon ( ; from the Greek letter mu (μ) used to represent it) is an elementary particle similar to the electron, with an electric charge of −1 '' e'' and a spin of , but with a much greater mass. It is classified as a lepton. As wi ...

and the spectra of positronium and muonium, which made possible far more exact comparisons between theory and experiment. In 1962 he introduced the Kinoshita-Lee-Nauenberg theorem. In the 1970s he worked on

quantum chromodynamics In theoretical physics, quantum chromodynamics (QCD) is the theory of the strong interaction between quarks mediated by gluons. Quarks are fundamental particles that make up composite hadrons such as the proton, neutron and pion. QCD is a type ...

and quarkonium - spectroscopy with

Estia Eichten Estia Joseph Eichten (born 1946), is an American theoretical physicist, of the Fermi National Accelerator Laboratory (Fermilab). He received his Ph.D. in 1972 from the MIT Center for Theoretical Physics, where he was a student of Roman Jackiw's, ...

, Kenneth Lane, Kurt Gottfried. In 2001 Kinoshita had to admit there was an error in his computation of the anomalous magnetic moment of the muon, after experiments at Brookhaven discovered a discrepancy in the 9th to-right-of-the-decimal-point position — leading many to believe that experimental evidence had revealed "new physics". However, a group in Marseille examined Kinoshita's calculation in precise detail and found that the error resulted from a sign error within the computer algebra program used for the original calculation. When the software bug was fixed, the discrepancy was resolved.Schwartzschild, 2002
/ref> In 1973-1974 he was a Guggenheim Fellow. He received in 1990 the Sakurai prize. In 1991 he became a member of

National Academy of Sciences The National Academy of Sciences (NAS) is a United States nonprofit, non-governmental organization. NAS is part of the National Academies of Sciences, Engineering, and Medicine, along with the National Academy of Engineering (NAE) and the Nati ...

Publications

* Kinoshita as editor and co-author
''Quantum Electrodynamics.''
World Scientific 1990 (hbk); (pbk)

External links

Biography from the APS

References

{{DEFAULTSORT:Kinoshita, Toichiro Japanese physicists Members of the United States National Academy of Sciences 1925 births Living people Cornell University faculty Institute for Advanced Study visiting scholars J. J. Sakurai Prize for Theoretical Particle Physics recipients People associated with CERN