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Introduction to forces and particles. The four forces; classification of leptons, hadrons, mesons, baryons. Strangeness. The quark model: quark model of mesons and baryons; charm (J/ø-particle); QCD; asymptotic freedom. Isospin. Neutrinos and neutrino masses. Electro-weak theory and Higg''s bosons. Symmetries. Conservation laws. Discrete symmetries.(CPT).C, P, T violation. (KL-KS_oscillations). Grand unification; Proton decay; Supersymmetry. Current developments:Elementary discussion of string theory, current topics.
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