1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Masses of fundamental particles

  1. Jul 3, 2010 #1
    How were the masses of fundamental particles(electrons,protons,neutrons) determined?
  2. jcsd
  3. Jul 3, 2010 #2
    Each is a long story of it's own...

    Start with the Electron:-
    Google the names JJ Thompson and Robert Millikan
  4. Jul 4, 2010 #3
    experimentally. we have no theory which describes their masses. They are inputs to the standard model of particle physics....not derived from it. (only because we are not smart enough yet.)
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook