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Trying to understand (E2 - p2c2 = m2c2 )

  1. Mar 22, 2012 #1
    I am trying to understand the following equation:
    what is P?
  2. jcsd
  3. Mar 22, 2012 #2


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    p is the normal 3-momentum of the particle.
  4. Mar 22, 2012 #3
    thank you Nabeshin
    if P is momentum of a particle that already exist
    how can this equation explain the create of virtual particle from nothing?
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