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

Parity - what does it matter?

  1. Feb 10, 2013 #1
    The parity operator has eigenvalues of +/- 1 and particles can have intrinsic parity of +/- 1. What does it matter? Does a P=-1 particle behave physically different from a P=+1 particle?

    Is parity a useful concept only in the sense that one can check if an interaction conserves parity (parity of final state particles is same as parity of initial state particles) or not and then conclude something about the nature of the coupling (the mathematical form of the vertex factor, say)?
     
  2. jcsd
  3. Feb 10, 2013 #2

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    Parity is useful there. The electromagnetic and strong interaction conserve parity, for example.
    The Tau Theta puzzle is an interesting example how parity considerations lead to new insights.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook