Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Heard of these even more elementary particles

  1. Jul 16, 2010 #1
    I don't know if anyone has heard of these even more elementary particles, http://en.wikipedia.org/wiki/Preon
    There even more fundamental than quarks, i was wondering if they are well excepted into the scientific community or if its a very unlikely that they are real.
  2. jcsd
  3. Jul 16, 2010 #2
    Re: Preons

    They are well excepted but not well accepted.
  4. Jul 17, 2010 #3


    User Avatar
    Science Advisor

    Re: Preons

    The problem with sub-leptonic particles is that up to now nobody understands how bound states (ordinary leptons like electrons, neutrinos and quarks) of these sub-leptonic particles can be light.

    Usually bound state masses scale with some power of 1/x where x is a typical length scale. This is a rather simple consideration which already works in quantum mechanics: from the size of the Hydrogen atom you can estimate its ionization energy. The order of magnitude comes out right.

    But neutrinos are (nearly) massles and (nearly) point like, so somehow the usual mechanism do no longer work.

    So it is not enough to put together these objects algebraically, one has to find a theory with correct dynamics.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook