Perl, Martin Lewis

Perl, Martin Lewis

▪ American physicist
born June 24, 1927, New York, N.Y., U.S.

      American physicist who received the 1995 Nobel Prize for Physics for discovering a subatomic particle that he named the tau, a massive lepton with a negative charge. The tau, which he found in the mid-1970s, was the first evidence of a third “generation” of fundamental particles, the existence of which proved essential for completing the so-called standard model of particle physics. Perl was jointly awarded the Nobel Prize with physicist Frederick Reines (Reines, Frederick) (q.v.), who discovered another subatomic particle, the neutrino, in the 1950s.

      In 1948 Perl graduated from the Brooklyn Polytechnic Institute with a degree in chemical engineering. After working as a chemical engineer for two years, he studied nuclear physics at Columbia University (Ph.D., 1955). He was an instructor and associate professor at the University of Michigan (1955–63) before joining the faculty of Stanford University in 1963.

      In 1966 Perl was part of a research team that made an unsuccessful attempt to discover new charged leptons by colliding electrons at the Stanford Linear Accelerator Center (SLAC). A new particle accelerator that began operation at SLAC in the early 1970s had the capacity to reach high energy levels that were previously inaccessible. With this new machine, Perl recorded frontal collisions between electrons and their antiparticles, positrons. In a series of experiments conducted between 1974 and 1977, he found that the collisions formed heavy leptons, later called tau particles, that decay in less than a trillionth of a second into neutrinos and either an electron or a muon. He also discovered the antitau, which decays into neutrinos and either a positron or an antimuon.

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Universalium. 2010.

См. также в других словарях:

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  • Perl , Martin Lewis — (1927–) American physicist Born in New York, Perl first graduated in chemistry in 1948 at the Brooklyn Polytechnic Institute. After working in industry as a chemical engineer for General Electric, Perl became interested in nuclear physics.… …   Scientists

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  • Martin Lewis Perl — Martin Lewis Perl. Este artículo o sección necesita referencias que aparezcan en una publicación …   Wikipedia Español

  • Martin Lewis Perl — (24 juin 1927 à New York) est un physicien américain. Il est lauréat de la moitié du prix Nobel de physique de 1995 pour sa découverte du lepton tau[1] …   Wikipédia en Français

  • Physiknobelpreis 1995: Martin Lewis Perl — Frederick Reines —   Die Amerikaner wurden für »ihre experimentellen Pionierbeiträge auf dem Gebiet der Leptonphysik« ausgezeichnet.    Biografien   Martin Lewis Perl, * New York 24. 6. 1927; 1948 Abschluss des Chemiestudiums in New York, danach Physikstudium und… …   Universal-Lexikon

  • Martin L. Perl — Martin Lewis Perl Martin Lewis Perl Martin Lewis Perl, né le 24 juin 1927 à New York, est un physicien américain, qui a obtenu le prix Nobel de physique en 1995 pour sa découverte du lepton tau. Ses parents étaient des immigrants venant de la… …   Wikipédia en Français

  • Martin Perl — Martin Lewis Perl Martin Lewis Perl Martin Lewis Perl, né le 24 juin 1927 à New York, est un physicien américain, qui a obtenu le prix Nobel de physique en 1995 pour sa découverte du lepton tau. Ses parents étaient des immigrants venant de la… …   Wikipédia en Français

  • Martin L. Perl — Martin Lewis Perl (* 24. Juni 1927 in New York) ist ein US amerikanischer Physiker. Für seine Entdeckung des Tauons erhielt er zusammen mit Frederick Reines 1995 den Nobelpreis für Physik. Perl ist der Sohn jüdischer Einwanderer aus dem damals zu …   Deutsch Wikipedia

  • Perl — (izg. pȇrl), Martin Lewis (1927) DEFINICIJA američki kemičar i fizičar; Nobelova nagrada za fiziku 1995. (s F. Reinesom) …   Hrvatski jezični portal


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