History, quark model and the SU(3)-symmetry

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Quark model e + e--Annihilation At high energies electrons and positrons annihilate into hadrons e + + e-hadrons Simela Aslanidou 14.12.2006
Simela Aslanidou 14.12.2006 Quark model Cross section More common ( ) ∑ πα = → σ − + f N i i c ² Q N s 3 ² 4 hadrons e e ( ) ² Q N s 3 4 hadrons e e R f N i i c ∑ = πα → σ = − + 3 1 Q 3 2 Q 3 1 Q 3 2 Q 3 1 Q 3 2 Q quarks of charge Q colours of number N 4 e bottom top strange charm down up i i 2 − = = − = = − = = = = π = α
Page 1 and 2: QCD History, quark model and the SU
Page 3 and 4: History • up to the beginning of
Page 5 and 6: History • 1950´s Robert Hofstadt
Page 7 and 8: History • both, Gell-Mann and Zwe
Page 9 and 10: History • the method of the exper
Page 11 and 12: Concepts The proton is an extended
Page 13 and 14: Concepts invariant mass W² c² = P
Page 15 and 16: Inelastic scattering Displaying the
Page 17 and 18: Inelastic scattering d² σ dΩdE
Page 19 and 20: Quarks Existence of Quarks there is
Page 21 and 22: Quark model Problems • non-observ
Page 23 and 24: Necessity of the colour Quarks are
Page 25 and 26: Colour • in 1965 O.W.Greenberg in
Page 27 and 28: Colour The additive colour model Si
Page 29: Quark model • why are there three
Page 33 and 34: Ratio of the cross section Comparis
Page 35 and 36: Gluons • gluons are the gauge bos
Page 37 and 38: SU(N) • group of the non-abelian
Page 39 and 40: SU(3) Why SU(3)-flavour? With the S
Page 41 and 42: The Baryon-Oktet Start from the fun
Page 43 and 44: References T. Muta, World Scientif

History, quark model and the SU(3)-symmetry

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