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Homework Help: Four-derivative expression help

  1. Mar 30, 2008 #1
    1. The problem statement, all variables and given/known data
    I need to take the derivative of this expression explicitly

    2. Relevant equations
    [tex]\partial_{\mu}Ae^{(-i/\hbar)x\bullet p}u(p)[/tex]

    3. The attempt at a solution
    I tried to take the derivative of it by taking the derivatives of components of the momentum four vector "p".
    However, I got stuck while trying to recombine the expression left from derivation.
    Last edited: Mar 30, 2008
  2. jcsd
  3. Mar 30, 2008 #2


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    [tex]\partial_{\mu}Ae^{(-i/\hbar)x\bullet p}u(p)
    =Ae^{(-i/\hbar)x\bullet p}u(p)[-i\hbar\partial_{\mu}(x^{\nu}p_{\nu})][/tex],
    which should be easy.
    Last edited: Mar 30, 2008
  4. Mar 30, 2008 #3
    thanks a lot!
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