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The invariant momentum-space volume element?

  1. Feb 21, 2014 #1
    When we way that

    [tex]\frac{d^3p}{p_0}=\frac{d^3p}{\sqrt{m^2+\vec{p}^2}}[/tex]

    is the invariant volume element, is that with respect to all Lorentz transformations or just proper orthochronous Lorentz transformations?
     
  2. jcsd
  3. Feb 21, 2014 #2

    WannabeNewton

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    The latter
     
  4. Feb 21, 2014 #3
    Thanks.
     
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