Jayme Tiomno

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Jayme Tiomno

Jayme Tiomno (born April 16, 1920 in Rio de Janeiro ; † January 12, 2011 ibid) was a Brazilian experimental and theoretical physicist who dealt with elementary particle physics and general relativity .

Tiomno was the son of Jewish immigrants from Russia. He first studied medicine in Rio before turning to physics at the University of Sao Paulo under the influence of Mário Schenberg . From 1948 to 1950 he studied at Princeton University with John Archibald Wheeler, among others . He published with Wheeler and Chen Ning Yang and completed his doctorate in 1950 under Eugene Wigner ( Neutrino physics and double beta decay ) when Wheeler went to Paris in 1949. In 1949 he was one of the founders of the Centro Brasileiro de Pesquisas Físicas (CBPF) in Rio with José Leite Lopes and César Lattes , where he was professor from 1952. In 1965 he worked at the physics faculty of the newly founded university in Brasília . From 1967 to 1969 he was a professor at the University of Sao Paulo. He was released in 1969 during the military rule in Brazil. From 1973 to 1980 he taught as a professor at the Catholic University in Rio.

In 1959/60 he was visiting scholar at Imperial College London and in 1967 at the ICTP in Trieste. In 1971/72 he was at the Institute for Advanced Study .

From 1947 to 1949 he undertook fundamental work on decays with muons at Princeton (the Tiomno-Wheeler triangle is named after him and Wheeler) and, together with Wheeler, proposed the independence of electron and muon neutrinos. In the 1950s he dealt with parity violation , among other things . and the general form of weak interaction (with CN Yang 1950). The work with Wheeler and Yang was the first to show a universal form of weak interaction in the proton, neutron, electron and muon system. In this context, he also introduced matrices (see Dirac matrices ) into the formulation of the weak interaction. In 1957 he proposed an early unified theory of elementary particles (with the seven-dimensional orthogonal group as symmetry).

In 1960 he suggested the existence of resonances in mesons.

In 1951 he and W. Schutzer were one of the first to propose causality conditions in the S-matrix theory (later named after both). Alongside Marvin Goldberger, he was also one of the first to look at dispersion relations.

Later he dealt with cosmologies of the Godel type , among other things . In 1970 he developed an alternative to the general theory of relativity with Bollini and Gambiaga.

Tiomno was a member of the Brazilian Academy of Sciences and the Academy of Sciences in Sao Paulo and received the Ordem Nacional de Merito Cientifico in 1994. In 1957 he received the Moinho Santista Prize.

Web links

Individual evidence

  1. ^ JA Wheeler, J. Tiomno Energy spectrum of electrons from meson decay , Reviews of Modern Physics, Volume 21, 1949, pp. 144-152
  2. ^ JA Wheeler, J. Tiomno Charge-exchange reaction of the μ-meson with the nucleus , Reviews of Modern Physics, Volume 21, 1949, pp. 153-165
  3. ↑ CN Yang, J. Tiomno Reflection properties of spin 1/2 fields and a universal Fermi-type interaction , Physical Review, Volume 79, 1950, pp. 495-498
  4. ^ J. Tiomno, Non Conservation of Parity and the Universal Fermi Interaction , Il Nuovo Cimento, Volume 6, 1957, pp. 912-916
  5. ↑ Tiomno, A. Videiro, N. Zagury Possible existence of a new K 'meson , Phys. Rev. Lett., Vol. 6, 1960, p. 120
  6. ↑ Schutzer, Tiomno, Physical Review, Volume 83, 1951, p. 249
  7. ↑ MJ Reboucas, J. Tiomno, Homogeneity of Riemannian space-times of Gödel type , Physical Review D, Volume 28, 1983, pp. 1251-1264
  8. ↑ MJ Reboucas, J. Tiomno, A class of homogeneous Godel type models. Il , Nuovo Cimento B, Vol. 90, 1985, pp. 204-210
  9. ^ I. Soares, M. Galvão, J. Tiomno, Geodesics in Gödel-type space-times , General Relative and Gravitation, Volume 22, 1990, pp. 683-705
  10. ↑ CG Bollini, JJ Giambiagi, J. Tiomno, A linear theory of gravitation , Nuovo Com. Lett. 3, 1970, 65-70
personal data
SURNAME Tiomno, Jayme
BRIEF DESCRIPTION Brazilian experimental and theoretical physicist
DATE OF BIRTH April 16, 1920
PLACE OF BIRTH Rio de Janeiro
DATE OF DEATH January 12, 2011
Place of death Rio de Janeiro