Introduction to Particle Physics

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Presentation transcript:

Introduction to Particle Physics NCPP School 2017 Wan Ahmad Tajuddin Wan Abdullah NCPP, UM

Particle Physics Building blocks of the universe Things Interactions

Building blocks

Things

Fundamental things

Dirac equation

Fundamental interactions

Quantum fields

Path integrals

Gauge symmetry local gauge field  coupling term (force field) y (possibly a spinor) respects certain symmetry (L invariant)

Feynman diagrams

QED: Muon g-2 U(1) symmetry

QCD: gluon bremsstrahlung SU(3) symmetry

Weak Interactions: weak neutral current

Handedness, Flavours Wu 1956 weak eigenstates ≠ energy eigenstates ??? the lepton sector ??? weak interaction left-handed ??? the neutrino story ???

Electroweak Unification SU(2)xU(1) → spontaneous → weak + e/m symmetry symmetry breaking (Z0, W±, γ) (massless (Higgs-Kibble mechanism) bosons) ↑ Higgs field H

Grand Unified Theories

Standard Model

Gravitation General Relativity ↑ Equivalence principle local SR

Standard Cosmology

Inflationary Big Bang age ~ length scale ~ radiation frequency ~ energy ~ temperature

Contemporary puzzles Dark matter Dark energy SUSY? Quantum gravity, TOE SM structure Spacetime structure; “particles” etc

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