Unit 1: Quarks And Leptons Flashcards
What is a pion?
It is a meson which can have either charge.
What is a muon?
A lepton that is a negatively charged particle and it is heavier than an electron.
What is a kaon?
It is a meson which can have either charge.
When are mesons produced?
Through the strong interaction yet they decay through the weak interaction.
Which particles are hadrons?
Particles that experience the strong interaction.
What are leptons?
Particles and antiparticles that do not interact through the stone interaction. They interact through the weak interaction and through the electromagnetic interaction if charged.
How do hadrons decay?
Through the weak interaction.
Leptons are…
Light and weak
Hadrons are…
Strong and heavy
Which baryon does not decay?
Proton
What is the total energy of a particle and antiparticle before the collision?
Their rest energies + kinetic energy
What is the rest energy of the products equal to?
Total energy before - the kinetic energy of the products.
What is one GeV equal to?
1000 MeV
What are mesons?
Hadrons that do not include protons in their decay products.
How can leptons change into other leptons?
Through the weak interaction.
Are leptons fundamental particles?
Yes
Which interaction is strangeness conserved in?
The strong interaction.
Which interaction is strangeness not conserved in?
The weak interaction
What are the three types of quark?
Up, down and strange.
What are mesons made up of?
A quark and anti-quark.
K0?
Down and anti-strange.
K+?
Up and antistrange
Pi-?
Down and anti-up
Pi0?
Up and antiup or down and antidown
Pi+?
Up and anti-down
K-?
Strange and antiup
K0?
Strange and antidown
How many quarks do baryons have?
3
What is the quark composition of a proton?
Uud
What is the quark composition for a neutron?
Udd
What is conserved during an interaction?
Strangeness, charge, lepton number and baryon number.
