Extra Credit 5

The Particle Adventure

Go to http://www.particleadventure.org/.
A mirror site is http://pdg.web.cern.ch/pdg/particleadventure/index.html.

Take the interactive tour of quarks, neutrinos, antimatter, extra dimensions dark matter, accelerators and particle detectors!  Tour each section, and then answer the questions below!  Have fun!


Section/Page: Question:
What is Fundamental?
  • In order for a particle to be considered fundamental,
    what must be true about it?
  • Are quarks considered to be fundamental?
  • What is the maximum size (in meters) of electrons and quarks?
  • According to the Standard Model, what accounts for all of the
     subatomic particles and the interactions between them?
What is the World Made of?
  • In what way is a particle different from its antiparticle?
  • What is the unusual characteristic of quarks?
  • How are the generations of matter organized? 
  • Which generation(s) of matter is the visible matter
    in the universe made of?
  • Why arenít other particles included in visible matter?
What Holds it Together?
  • Whatís the difference between a force and an interaction?
  • What is a force at the fundamental level?
  • What does the residual E-M force allow atoms to do?
  • What two types of charge do quarks have?
  • What does the residual strong force do thatís so important?
  • What are weak interactions responsible for?
Particle Decays and Annihilations
  • What does particle decay refer to when we are talking
    about fundamental particles?
  • Give examples of decays caused by the strong, electromagnetic,
    and weak interactions!
Unsolved Mysteries
  • At approximately what particle energies do some GUTs predict
    that the strong, electromagnetic and weak forces merge?
  • What is supersymmetry?
How do we know any of this?
  • How do we improve the resolution of our probes?
How Do We Experiment With Tiny Particles?
  • What is used to accelerate particles in an accelerator?
  • What is the advantage the colliding-beam arrangement?
  • What types of particles are detected in the tracking chamber?
  • What does the hadron calorimeter measure?
  • Why are muons and neutrinos the only particles detected in the
    muon chambers?
  • How is the presence of neutrinos inferred from muon chamber data?
How Do We Interpret Our Data?
  • Why arenít neutrons and photons detected in the tracking chamber?
  • How do researchers know that a particle detected in the muon chamber
    is actually a muon and not some other particle?