Stuart Samuel (physicist)

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Stuart Alan Samuel (born August 8, 1953 in Buffalo (New York) ) is an American theoretical physicist .

Life

Samuel graduated from Princeton University with a bachelor's degree magna cum laude in 1975 and a PhD in physics from the University of California, Berkeley in 1979 . As a post-doctoral student , he was at the Institute for Advanced Study from 1979 to 1983 . 1985/86 he was a visiting scientist at CERN . He was an assistant professor at Columbia University from 1981 to 1984 and then professor at City College of New York until 2000 .

plant

With Alan Kostelecky , he developed the theory of terms breaking the Lorentz symmetry in the so-called Standard Model Extension (SME). As an example, they constructed an effective model of quantum gravity with a four-vector potential as a background field ( Bumblebee model ).

In 2003 he showed that the corrections to the Shapiro delay are too small to be measured in an experiment of observing quasar light near Jupiter and to provide information on the speed of gravitational propagation.

He dealt with string theory , quantum chromodynamics and their treatment as lattice theory and developed a supersymmetric variant of Technicolor (Bosonic Technicolor). With Julius Wess he investigated spontaneous breakage of supersymmetry in supersymmetrical extensions of the Standard Model . They came to the conclusion that in addition to the Higgs boson of the standard model, there should be at least two other neutral Higgs and one loaded Higgs. If you find several (neutral) Higgs that would be an indication of supersymmetry according to Wess and Samuel.

In the mid-1980s he and KJM Moriarty obtained early results on the spectrum of hadrons ( baryons , mesons , also hadrons with bottom quarks ) in lattice quantum chromodynamics , which later proved to be quite good with a few exceptions. An exception was the Pion , where their approximation was poor because of the spontaneously broken chiral symmetry . They circumvented the problems with the simulation of fermions on the lattice by treating them as scalar particles in a first approximation and treating the spin degrees of freedom in terms of perturbation theory.

He investigated models of statistical mechanics using methods from quantum field theory, for example the Ising model as a theory of interacting fermions.

Samuel studied neutrino oscillations in a dense neutrino gas, such as existed in the early universe, and predicted a number of nonlinear effects.

Awards

He received a Humboldt Research Award in 1993 and was a Sloan Research Fellow in 1984 . In 1985 he received a PACER Award from Control Data Corporation (for his work with Moriarty) and in 1988 he was a Chester-Davis Fellow at Indiana University.

Web links

Individual evidence

  1. ↑ Year and place of birth in the membership book of the Institute for Advanced Study 1980. Birthday of Stuart Samuel on Prabook.com (English). Retrieved January 5, 2019.
  2. ↑ Entry on the IAS website, see web links
  3. ^ Alan Kostelecky, Stuart Samuel: Gravitational phenomenology in higher-dimensional theories and strings. Physical Review D, Volume 40, 1989, pp. 1886-1903.
  4. ^ Stuart Samuel: On the Speed ​​of Gravity and the v / c Corrections to the Shapiro Time Delay. Phys. Rev. Lett., Vol. 90, 2003 p. 231101 ( Arxiv ).
  5. ^ Stuart Samuel: Topological Symmetry Breakdown and Quark Confinement. Nucl. Phys. B, Volume 154, 1979, p. 62.
  6. ↑ Stuart Samuel Bosonic Technicolor. Nucl. Phys. B, Vol. 347, 1990, pp. 625-650.
  7. ^ Julius Wess, Stuart Samuel: Secret Supersymmetry. Nucl. Phys. B, Volume 233, 1983, p. 488.
  8. ^ KJM Moriarty, Stuart Samuel: Precise hadron mass calculations from lattice QCD. Phys. Lett. B, vol. 158, 1985, p. 437.
  9. ^ KJM Moriarty, Stuart Samuel: Precise Baryon Mass Calculations From Scalar Lattice QCD. Phys. Lett. B, Volume 166, 1986, p. 413.
  10. ^ KJM Moriarty, Stuart Samuel: Beautiful Mass Predictions From Scalar Lattice QCD. Phys. Lett. B, Volume 175, 1986, p. 197.
  11. ^ Stuart Samuel: The use of anticommuting integrals in statistical mechanics. 3 parts, Journal of Mathematical Physics, Volume 21, 1980, pp. 2806, 2815, 2820.
  12. ↑ Stuart Samuel: Neutrino oscillations in dense neutrino gases. Phys. Rev. D, Volume 48, 1993, pp. 1462-1477.
  13. ^ Alan Kostelecky, Stuart Samuel: Nonlinear neutrino oscillations in the expanding universe. Phys. Rev. D, Vol. 49, 1994, pp. 1740-1757.
personal data
SURNAME Samuel, Stuart
ALTERNATIVE NAMES Samuel, Stuart Alan (full name)
BRIEF DESCRIPTION American theoretical physicist
DATE OF BIRTH August 8, 1953
PLACE OF BIRTH Buffalo (New York)