Particle Physics Flashcards
(24 cards)
What particle mediates the Strong Force?
Gluons mediate the stong interaction
What particles mediate the Weak Force?
W and Z bosons mediate the weak interaction
What particle mediates the Electromagnetic force?
Photons mediate the electromagnetic force and make up light and other electromagnetic waves.
Antiparticles compared to particles
Antiparticles have the same mass but opposite charge to their equivalent ordinary particles.
Baryons
Contain 3 quarks (examples: hadron, proton)
Mesons
Contain a quark and an antiquark
Baryon number is conserved in:
Strong, Weak and Electromagnetic forces (also gravitational)
Strangeness is conserved in:
Strong and Electromagnetic forces (also gravitational)
Protons are made of
Up Up Down quarks
Neutrons are made of
Up Down Down quarks
Leptons
Example: Electron
All quarks have a baryon number of
+ 1/3
The lepton number of the electron neutrino is
1
The lepton number of the electron antineutrino is
-1
Quarks
Quarks are the type of particles that combine to form Baryons and Mesons.
Strangeness Number
The number of every particle except s is 0. S is -1
Up Quark
Charge: +2/3
Symbol: u
Down Quark
Charge: - 1/3
Symbol: d
Charm Quark
Charge: +2/3
Symbol: c
Strange Quark
Charge: -1/3
Symbol: s
Top Quark
Charge: +2/3
Symbol: t
Bottom Quark
Charge: -1/3
Symbol: u
Beta Minus Decay
n –> p + electron + antineutrino
Beta Positive Decay
p –> n + positron + neutrino
