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

What is the difference between string that make phontons and proton?

  1. Sep 29, 2012 #1
    according to the string theory, what is the difference between the strings that make the photons and the strings that make the protons? photons don't have mass and protons do, does it all ultimately rely on simply how the strings vibrate, or what? do photons' strings have lowest energy possible, or they have very few strings, so that's why they are massless??
  2. jcsd
  3. Sep 29, 2012 #2


    User Avatar
    2017 Award

    Staff: Mentor

    Protons are not elementary particles, they consist of quarks (with mass) and gluons (massless). In the Standard Model, this mass comes from the interaction with the Higgs field, the particles itself are introduced as massless. String theory should reproduce that, so no particles (apart from the Higgs boson) have an intrinsic mass, that just emerges from the interactions.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook