Flashcards : Fundamentals of Particle Interactions — 24 cartes

Approximate invariance treating quark flavours interchangeably.

Groups up and down quarks into a doublet.

Organizes light quarks into multiplets, relates hadron properties.

Classify hadron states with related quantum numbers.

Combines quark-flavour states into hadron wavefunctions.

Quantum field theory of strong interactions via colour charge.

Physics unchanged under position-dependent gauge transformations.

Non-Abelian gauge symmetry governing quark transformations.

Gauge boson mediating the strong force, carries colour.

Generators do not commute, gluons self-interact.

Coloured quarks/gluons cannot be isolated as free particles.

Weakens at high energies, allows perturbative QCD.

Produces hadrons via quark hadronization after annihilation.

Parton model treats hadrons as quark/gluon constituents.

Numerical weights from colour algebra affecting amplitudes.

Gluons mediate strong interaction between coloured partons.

Couples quarks/leptons, changes flavour via W exchange.

Sets interaction strength; amplitude scales with g².

Mediator of charged-current weak interactions, changes flavour.

Weak interactions couple differently to left/right-handed fermions.

Arrow points to antiparticle: electron antineutrino.

Weak coupling is equal for all charged leptons.

Neutrinos transfer energy/momentum to matter.

Largest, scales as 1/v².