Fundamental Particles Flashcards
What are the Four Fundamental Forces
- Gravity
- Weak Nuclear
- Electromagnetic
- Strong Nuclear
What are the Fundamental Particles Carried by and Act on
What are Exchange Particles
Particles that carry energy and momentum between elementary particles
What are the Feynman Diagram Rules
- Particles are represented by straight lines
- Exchange particles are represented by wavy lines
- Particles are annihilated and created at the vertices
What is the Advantage of Feynman Diagram over symbol equation
The feynman diagram shows us the interactions that occur rather that just what goes in and what comes out
Describe the Beta Minus Decay Feynman Diagram
- n = neutron
- p = proton
- W- = exchange particle
- e- = electron
- ̅νe= electron antineutrino
Describe the Beta Plus Decay Feynman Diagram
- p = proton
- n = neutron
- W+ = exchange particle
- e+ = positron
- ve = electron neutrino
What is Electron Capture
When an electron is absorbed by a proton so the proton decays into a neutron and a neutrino, a W+ exchange particle is exchanged
Describe the Electron Capture Feynman Diagram
What is Electron Proton Collision
When a proton and electron collide, the proton turns into a neutron and the electron turns into a neutrino, a W- exchange particle is exchanged
Electron Proton Collision Feynman Diagram
What are Quarks
Fundamental particles, there are 6 and they are composite (come in pairs)
What are the Flavours of Quarks
- Up
- Down
- Top
- Bottom
- Charm
- Strange
Describe the Classification of Particles
What does a muon decay into
Electron ( e −) + Electron Anti-neutrino + ( ̅ νe) + muon neutrino (νμ)
