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What gives particles their property?

  1. Jun 5, 2006 #1
    Yes, the same questions as in the topic. What gives particles their property, like charge, structure, what to interact with, amount of energy and all the like?

    And also another question, are 2 protons the same? From a visible world, me may easily conclude that no 2 things exactly alike. Even if they look alike at a first glance, when examining the positions of molecules, microscopic shapes, etc, they aren't alike anymore. So is it possible that even no 2 particles are exactly the same, and even if they're very similar, there's even a real tiniest difference in for example amount of energy they have has etc.?

    Also, does a field arise by interactions of particles, or field already exists and particles are shaped by the already existing fields?

  2. jcsd
  3. Jun 6, 2006 #2
    Well, properties like charge, mass and spin of elementary particles are instrinic by nature and it is independent of external factors.
    Yes, two protons are same in terms of their intrinsic properties. But protons belong to a class of particles called Fermions. As a result of the antisymmetric wavefunction, fermions obey Fermi-Dirac statistics, whose consequence is the Pauli exclusion principle - no two fermions can occupy the same quantum mechanical state at the same time.
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