Recent content by etayf

  1. E

    Particle Physics: O(1 TeV) and O(1 pb^-1)

    thanks for answers
  2. E

    Particle Physics: O(1 TeV) and O(1 pb^-1)

    I saw a sign in particle physics ;O(1 TeV) and O(1 pb^-1). TeV is unit of energy and pb^-1 is unit of cross scetin I wonder why these signs are putting into parahenthesis
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