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Transcript of Particle Physics
W & Z Bosons
Collectively known as gauge bosons
These are emitted by particles constantly.
This forms a field
Range of field depends on the mass of the boson.
Two fields interacting can cause entanglement.
Emitted whenever a charged particle accelerates
Only found in hadrons
They have a property known as colour
Colours change when gluons exchanged
Red, Green, Blue and antimatter versions
Any particles colour must add up to white
Red + Green + Blue
Red + anti-red
Causes β decay
Electrons or Positrons emitted
Interact through strong force
Flavour changed by weak force
Never observed on their own
Discovered by firing electrons at protons
(deep inelastic scattering experiment)
Theorized to explain combinations created in the 'particle zoo'
Property of colour used to bypass the exclusion principle
Can change into other leptons through weak force.
6 flavours 3 generations/branches
Neutrinos have very few interactions
'Conservation of branch lepton number' rule
lepton = 1
anti-lepton = -1
non lepton = 0
What is spin?
Property of matter
Intrinsic angular momentum
Production of magnetic fields
Mini 'bar magnets'
Cannot be considered to be actually moving
Would require more than light speed
½ integer spin
angular momentum = ½h
=6.62 × 10⁻³⁴ m² kg / s
3 quarks or
decay into smaller
1 quarks +
All coloured white
Quantum Chromo Dynamics
Red, Green, Blue
All very unstable
Spin and it's effects
What is it's effect?
½ integer spin
Can cancel out
Electrons pair with opposite spins
Can add up
Pauli Exclusion principle
Conservation of strangeness -
Only strange and anti strange quarks have this.
Conserved in strong interactions but not in weak
'Conservation of baryon number' rule
baryon = 1
anti-baryon = -1
non baryon = 0