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Standard model of particle physics
wan ahmad tajuddin wan abdullah jabatan fizik universiti malaya
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Elementary particles and fields
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hadrons
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EM Quantum Electrodynamics (local) gauge invariance
ψ(x) → eiθ ψ(x) U(1) gauge field theory minimal coupling Hamiltonian: +
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Electroweak Unified weak + EM [couplings related e.g. e+e- W+W-]
SU(2)xU(1) gauge field theory A+ A- A B0 Spontaneous symmetry breaking – Higgs mechanism A+ A- A B W+ W- Z0 g W and Z acquires mass Flavour mixing
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strong SU(3) gauge field theory – colour charges Gluons has colour:
confinement Asymptotic freedom
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Gravity General relativity Gravitational lensing
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