Chapter 2 Flashcards
What different ways do hadrons interact?
Weak
Electromagnetic
Gravity
Strong
What different ways do Leptons interact?
Weak
Electromagnetic
Gravity
What are the two subgroups of Hadrons?
Baryons
Mesons
What do Baryons consist of?
3 quarks
What do Mesons consist of?
2 quarks (quark/antiquark pair)
What is the only stable Baryon?
Proton
What do all baryons eventually decay into?
Protons
What are the 4 Baryons?
Sigma, Lambda, neutron and proton
What are the 3 strange Hadrons?
Sigma, Lambda and Kaon
What are the two mesons?
Kaon and Pion
What interaction produces mesons and which interaction do they decay via?
Produced by strong interaction but decay via weak
What are the 4 leptons?
Muon, electron, muon neutrino, electron neutrino
What two things do muons decay into?
Electrons and antineutrinos
What 3 things can Kaons decay into?
Pions or Muons & antineutrinos
What 3 things can pions decay into?
Photons (pion with 0 charge) or muons and antineutrinos (if they are charged)
Values for Baryon and lepton numbers
Baryons: Baryon no. +1
Antibaryons: Baryon no. -1
Leptons: Lepton no. +1
Antileptons: Lepton no. -1
What are the 4 coservation laws for charge, Baryon Number, Lepton Number and Strangeness?
1) Charge is Always conserved
2) Baryon no. is Always conserved
3) Lepton no. is always conserved (Lepton number separate for muons and electrons)
4) Strangeness Always conserved in strong interactions
Can change by 0, +1, -1 in weak interactions
