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Are forces mixed together?

  1. Sep 10, 2004 #1
    The graviton is postulated to be spin 2.
    But if a spin 2 became 2 x spin 1 sometimes then
    the force of gravity could become the electric force.
    And similarly 2 x spin 1 could become 1 x spin 2 sometimes.
    How would the effects of such transformations be detected in
    the laboratory?
    The force of gravity between two masses would be larger than predicted
    by relativity theory wouldn't it because there would be more spin 2 around than expected?
    Last edited: Sep 10, 2004
  2. jcsd
  3. Sep 10, 2004 #2
    This is an easy picture. There are many other conservation laws that have to be respected when interactions occur. eg energy conservation, conservation of baryonnumber and lepton number, conservation of isospin etc...

  4. Sep 10, 2004 #3
    Initially forces do not mix together, by definition. Then renormalisation includes all the fluctuations you propose. And finally renormalized interaction do not mix together either. So basically : no.
  5. Sep 10, 2004 #4
    Paul Dirac said a theory that is right should not need to be renormalised.
  6. Sep 10, 2004 #5
    I agree with him. That can't be a QFT.
  7. Sep 10, 2004 #6
    Be careful : believing we will ultimately find a theory that works at arbitrary energy is a religion. Believing Nature is not chaos is a religion too, but much less crazy.
  8. Sep 11, 2004 #7


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    It could be if we could just solve the damn path integral directly, or figure out a way to borel resum it.

    In a sense, we might already have the master equation (with suitable caveats). We just don't know what to do with it.

    Then again, thats probably not the full story either, depending on who you talk too.
  9. Sep 11, 2004 #8
    Yes right, thanks Haelfix for the precision ! Zee in his (not-too-high-level-)book claimed the statement I just repeated, in the introduction to renormalization chapter, but he also indicated earlier in the book that computing non-trivial path integrals could be considered as one of the "holy-graal"
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