Howard Georgi

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Howard Mason Georgi III (born January 6, 1947 in San Bernardino , California ) is an American physicist .

Life

Georgi graduated from Harvard University ( bachelor "magna cum laude" in Physics and Chemistry 1967) and 1971 was Yale University to Ph. D. with the work scale and conformal invariance in Field Theory doctorate . He has been at Harvard since 1971, where he was a Junior Fellow from 1973 to 1976, an Associate Professor from 1976 and a full professorship from 1980. He has been Mallinckrodt Professor there since 1992 and Harvard College Professor from 2005.

Georgi is known for his work on GUTs , especially in his pioneering work with Sheldon Lee Glashow in 1974 with GUTs for the calibration groups SU (5) and SO (10), which are still a favorite in a modified form today. With Helen Quinn and Steven Weinberg he found indications of the mutual approximation of the renowned coupling constants in GUTs. With Thomas Appelquist he carried out one of the first work on the calculation of radiation corrections in quantum chromodynamics (QCD). With De Rujula and Glashow he predicted the low-energy spectrum of Charmonium and made predictions from a quark model modified with the QCD. He also worked with David Politzer a . a. on perturbation-theoretical QCD, on effective quantum field theories (in general and from 1990 for heavy quarks), theories with compound Higgs particles and Technicolor theories, developed with Savas Dimopoulos in 1981 early supersymmetric GUTs, the so-called MSSM (Minimal Supersymmetric Standard Model). With Nima Arkani-Hamed he developed "Dimensional Deconstruction", which implements the advantages of theories with extra dimensions in a four-dimensional space-time by using calibration groups that are the direct product of identical copies of GUT calibration groups.

In 2007 he suggested the possibility of unparticle physics (literally non-elementary particle physics), the possible existence of a low-energy scale invariant field theory. It could not be described by particles with non-vanishing masses (since these are not scale-invariant in the low-energy range), but when interacting with particles of the Standard Model, it could become noticeable as the cause of missing energy and missing momentum. If the scaling dimension d is odd, it would resemble a theory with an odd number d of massless particles, which is one of the signatures Georgi has discussed for such theories.

From 1976 to 1980 he was a Sloan Research Fellow . In 1993 he became a Fellow of the American Physical Society . In 1995 he was elected a member of the National Academy of Sciences and was awarded the Sakurai Prize . In 2000 he received the Dirac Medal (ICTP) . In 2006 he received the Pomeranchuk Prize . From 1982 to 2004 he was the editor of Physics Letters, Series B. He is a member of the American Academy of Arts and Sciences .

His students include Benjamin Grinstein, John Hagelin , Lawrence J. Hall, David B. Kaplan, Aneesh Manohar, Ann Nelson, and Lisa Randall .

Works

  • Lie algebras in particle physics. From isospin to unified theories . Benjamin / Cummings, Reading, Mass. 1981 (2nd edition 1999)
  • Weak interactions and modern particle theory . Benjamin / Cummings, Reading, Mass. 1984 (online on his website)
  • The Physics of Waves , Prentice-Hall 1992

Web links

References

  1. ↑ Howard Georgi in the Mathematics Genealogy Project (English)Template: MathGenealogyProject / Maintenance / id used
  2. ^ Georgi, Glashow: Unity of All Elementary-Particle Forces. In: Physical Review Letters. Volume 32, 1974, pp. 438-441, Georgi-Glashow-Modell
  3. ^ Georgi, Quinn, Weinberg: Hierarchy of Interactions in Unified Gauge Theories. In: Physical Review Letters. Volume 33, 1974, p. 451
  4. ↑ Appelquist, Georgi: Annihilation in Gauge theories of strong interactions. In: Physicsal Review D. Volume 8, 1973, p. 4000
  5. ↑ De Rujulia, Georgi, Glashow: Hadron Masses in a Gauge Theory. In: Physical Review D. Volume 12, 1975, p. 147
  6. ↑ Dimopoulos, Georgi: Softly broken Supersymmetry and SU (5). In: Nuclear Physics B. Volume 193, 1981, p. 150
  7. ↑ Georgi Unparticle Physics , Phys. Rev. Letters, Volume 98, 2007, p. 221601 , Georgi Another odd thing about unparticle physics , Phys. Letters B, Volume 650, 2007, p. 275
personal data
SURNAME Georgi, Howard
ALTERNATIVE NAMES Georgi, Howard Mason III (full name)
BRIEF DESCRIPTION American physicist
DATE OF BIRTH January 6, 1947
PLACE OF BIRTH San Bernardino , California