- #1
GreyBadger
- 23
- 0
Hi all,
I have an exceptionally basic question, taken from P21 of Zee. Eq. 14 is
[tex]Z=\int D\psi e^{i\int d^4x(\frac{1}{2}[(\partial\psi )^2-m^2\psi^2] + J\psi)}[/tex]
The statement is then made that 'Integrating by parts under the [tex]\int d^4x[/tex]' leads to Eq. 15:
[tex]Z=\int D\psi e^{i\int d^4x[-\frac{1}{2}\psi(\partial^2+m^2)\psi + J\psi]}[/tex].
Now, I am being supremely thick, but I don't see how this follows. Could somebody please spell it out in small words?
I have an exceptionally basic question, taken from P21 of Zee. Eq. 14 is
[tex]Z=\int D\psi e^{i\int d^4x(\frac{1}{2}[(\partial\psi )^2-m^2\psi^2] + J\psi)}[/tex]
The statement is then made that 'Integrating by parts under the [tex]\int d^4x[/tex]' leads to Eq. 15:
[tex]Z=\int D\psi e^{i\int d^4x[-\frac{1}{2}\psi(\partial^2+m^2)\psi + J\psi]}[/tex].
Now, I am being supremely thick, but I don't see how this follows. Could somebody please spell it out in small words?