Standard model of particle physics

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Presentation transcript:

Standard model of particle physics wan ahmad tajuddin wan abdullah jabatan fizik universiti malaya

Elementary particles and fields

hadrons

EM Quantum Electrodynamics (local) gauge invariance ψ(x) → eiθ ψ(x) U(1) gauge field theory minimal coupling Hamiltonian: +

Electroweak Unified weak + EM [couplings related e.g. e+e-  W+W-] SU(2)xU(1) gauge field theory A+ A- A0 B0 Spontaneous symmetry breaking – Higgs mechanism A+ A- A0 B0  W+ W- Z0 g W and Z acquires mass Flavour mixing

strong SU(3) gauge field theory – colour charges Gluons has colour: confinement Asymptotic freedom

Gravity General relativity Gravitational lensing