Robert L. Jaffe

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Robert Loren Jaffe (born May 23, 1946 in Bath ) is an American theoretical physicist who is particularly concerned with the physics of quarks .

Life

Jaffe went to school in Stamford, Connecticut , studied physics at Princeton University with a bachelor's degree summa cum laude in 1968 and at Stanford University , where he received his master's degree in 1971 and received his doctorate in 1972. As a post-doctoral student , he was at the Center for Theoretical Physics at the Massachusetts Institute of Technology (MIT), where he became an assistant professor in 1974 and a full professorship in 1983. There he became Morningstar Professor of Physics in 2001 and headed the Center for Theoretical Physics from 1998 to 2005.

In 1976 he was visiting scholar at SLAC , 1978/1979 at CERN , 1979 in Oxford (St. Catherine's College), 1981 in Beijing 1986/87 at Boston University and 1996/97 at Harvard University . He was a consultant at Los Alamos National Laboratory , the SLAC and the Brookhaven National Laboratory (RIKEN-Brookhaven Center), where he also conducted research on the spin physics of hadrons. In 2004 he was at the Rockefeller Foundation Study Center in Bellagio, Italy. Since 2005 he has been advising on the establishment of a private university for science and technology in Lahore .

In the 1970s, Jaffe was one of the authors (with Victor Weisskopf , Kenneth A. Johnson , Alan Chodos , Charles Thorn ) of the MIT bag model of hadrons, a simplified model of hadrons as quarks confined in a volume with perturbation-theoretical quantum chromodynamics- residual interaction .

He was particularly concerned with the spin structure of hadrons, starting with a sum rule for the scattering of polarized leptons on nucleons with John Ellis . With Aneesh Manohar, he clarified the contribution of orbital angular momentum to nucleon spin. With Xiandong Ji, he introduced a new spin observable for quarks ( transversity ) in the investigation of transverse spins in the substructure of nucleons . In the early 1980s he was among the first to investigate terms with a higher twist in deep inelastic nucleon scattering. These are the result of many-body interactions between quarks and gluons in the target during scattering.

In addition, he investigated with Edward Farhi and others the role of strange quark matter and its possible importance in astrophysics and the quantum vacuum ( Casimir effect both in the Standard Model and GUTs and in nanotechnology and more precise calculation methods for this) and he dealt with exotic hadrons ( where he favored the model of the tetraquark made up of two diquarks). With Kenneth Johnson, he pioneered glueball research.

From 1975 to 1979 he was a Sloan Research Fellow . He is a Fellow of the American Physical Society (whose Panel on Public Affairs (POPA) he chaired in 2014) and the American Association for the Advancement of Science . He has received several prizes for outstanding teaching.

Jaffe has been married since 1977 and has three children.

Fonts

  • Where does the proton really got his spin?, Physics Today, September 1995

Web links

Individual evidence

  1. ↑ Life data according to American Men and Women of Science , Thomson Gale 2004
  2. ^ Jaffe, Robert L. Author profile . INSPIRE-HEP . Retrieved July 19, 2019.
  3. ↑ Chodos, Jaffe, Johnson, Thorn, Weisskopf: New extended model of hadrons, Physical Review D 9, 1974, pp. 3471-3496
  4. ↑ Chodos, Jaffe, Johnson, Thorn, Weisskopf, Baryon structure in the bag theory, Physical Review D 10, 1974, p. 2599
  5. ^ Ellis, Jaffe, A Sum Rule for Deep Inelastic Electroproduction from Polarized Protons, Phys. Rev. D 9, 1974, p. 1444
personal data
SURNAME Jaffe, Robert L.
ALTERNATIVE NAMES Jaffe, Robert Loren (full name)
BRIEF DESCRIPTION American theoretical physicist
DATE OF BIRTH May 23, 1946
PLACE OF BIRTH Bath