Confinement potential

  1. When we derive the Bethe-Salpeter equation, we have the relations of mass of constitute m, transverse momentum, q-hat and energy ω for equal mass constitute as
    ω^{2}=m^{2}+(q-hat)^{2}. What is the relations of ω,m and q-hat for low energy or long distance or low momentum? Can we say q-hat≈m?

    Thank you for taking time to help me!
  2. jcsd
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