Itzhak bars

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Itzhak Bars (born August 31, 1943 in Izmir ) is an American theoretical physicist .

Itzhak Bars studied at Robert College in Istanbul with a bachelor's degree in 1967 and at Yale University with a master's degree in 1969 and a doctorate with Feza Gürsey in 1971. He was a postdoctoral fellow at the University of California, Berkeley . In 1973 he became Assistant Professor at Stanford University , 1975 Assistant Professor and later Associate Professor at Yale and from 1983 Professor at the University of Southern California (USC). From 1999 to 2003 he was director of the Center for Theoretical Physics at Caltech and USC.

He deals with symmetries in elementary particle physics, with models of composed quarks and leptons, GUTs, supersymmetry (also in nuclear physics), supergroups, non-commutative geometry, twistors, superstrings and brane theories, string field theory, cosmology and physics with two time dimensions and four and more space dimensions. Bars specifically refers to the expansion to 4 space and 2 time dimensions, i.e. both an additional time and an additional space dimension, as 2T physics , with possible further compacted dimensions. The 4 + 2 dimensions are not small as in Kaluza-Klein theories . The theories have additional gauge symmetries (Sp (2, ), the symplectic group in 2 dimensions, it interchanges energy-momentum and time-location) and can be reduced to theories in 3 + 1 dimensions by setting the gauge, which is not unambiguous. Bars was able to show that the standard model in 4 + 2 dimensions corresponds in this way to an emergent standard model 3 + 1 dimensions, which has the same particle spectrum as the usual standard model. The additional symmetries in the two additional dimensions also result in properties that go beyond the standard model, for example the strong CP problem of quantum chromodynamics is solved without the need to introduce the Peccei-Quinn symmetry and axions . Bars also dealt with supersymmetric field theories and M-theory, which in the context of 2T physics would be described by 11 space and 2 time dimensions (instead of the usual 10 space and one time dimension).

Bars also helped calculate the contributions of the weak interaction to the anomalous magnetic moment of the muon (the measurement of which is one of the precision experiments in quantum electrodynamics).

In 1979 and 1990 he was a guest at the Institute for Advanced Study and in 1978 at Harvard and in the same year Junior Faculty Fellow at Yale. From 1976 to 1980 he was a Sloan Research Fellow . In 1986 he was at the Center for Theoretical Physics at the University of California, Santa Barbara .

In 1988 he received first prize from the Gravity Research Foundation. He is a fellow of the American Physical Society .

He is a US citizen.

Fonts

  • with John Terning: Extra dimensions in space and time , Springer 2010
  • Editor with Alan Chodos, Chia-Hsiung Tze: Symmetries in Particle Physics , Springer 1984

Web links

Individual evidence

  1. ↑ Life and career data according to American Men and Women of Science , Thomson Gale 2004
  2. ^ Bars: The Standard Model of Particles and Forces in the Framework of 2T-physics , Phys. Rev. D, Volume 74, 2006, p. 085019
  3. ^ Bars: Gravity in 2T Physics , Phys. Rev. D, Volume 77, 2008, p. 125027
  4. ^ Bars, Chen: Geometry and Symmetry Structures in 2T Gravity , Phys. Rev. D, Volume 79, 2009, p. 085021
  5. ^ Bars, Kuo: Supersymmetric Field Theory in 2T-physics , Phys. Rev. D, Volume 76, 2007, p. 105028
  6. ^ Bars, Kuo: Super Yang-Mills theory in 10 + 2 dimensions, The 2T-physics Source for N = 4 SYM and M (atrix) Theory , Preprint, USC, CERN 2010
  7. ↑ Bars, 2T-physics , homepage of Bars at USC
personal data
SURNAME Bars, Itzhak
BRIEF DESCRIPTION American physicist
DATE OF BIRTH August 31, 1943
PLACE OF BIRTH Izmir