Presentation on theme: "The History of Standard Model 1. The Nobel Prize winner 1979 Nobel Prize-- GLASHOW, SALAM and WEINBERG the theory of the unified weak and electromagnetic."— Presentation transcript:
The History of Standard Model 1. The Nobel Prize winner 1979 Nobel Prize-- GLASHOW, SALAM and WEINBERG the theory of the unified weak and electromagnetic interaction. 1984 Nobel Prize-- RUBBIA and VAN DER MEER the discovery of the field particles W and Z, communicators of weak interaction.
Ancient timesPeople think that earth, air, fire, and water are the fundamental elements. 1802Dalton’s Atomic theory began forming. 1897J. J. Thompson discovered the electron. 1911Rutherford discovered positive nucleus. 1930Pauli invented the neutrino particle. 1932James Chadwick discovered the neutron. 1937The muon was discovered by J. C. Street and E. C. Stevenson. 1956First discovery of the neutrino by an experiment: the electron neutrino. 1962Discovery of an other type of neutrino: the muon neutrino. 1969Friedman, Kendall, and Taylor found the first evidence of quarks. 1974The charmed quark was observed. 1976The tau lepton was discovered at SPEAR. 1977Experimenters found proof of the bottom quark. 1983Carlo Rubbia and Simon Van der Meer discovered the W and Z bosons. 1991LEP experiments show that there are only three light neutrinos. 1995The top quark was found at Fermilab. 1998Neutrino oscillations may have been seen in LSND and Super-Kamiokande. 2000The tau neutrino was observed at Fermilab. 2003A Five-Quark State has been discovered.discovered. A short summary of eventssummary
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4. Physicists are human beings 1898 Joseph Thompson : “plum-pudding”model of the atom 1911 Ernest Rutherford: “planetary” model of the atom It took 10 years to realize the muon wasn’t Yukawa’s pion. At the beginning, the “quark” model was not accepted widely. ……