I am trying to study QFT from Weinberg's Vol. 1.(adsbygoogle = window.adsbygoogle || []).push({});

I am at the moment stuck at the path integral quantization of QED (Weinberg's treatment).

I am not sure how he integrates out the matter field momenta (for the spinor field) in eq. (9.6.5). I thought for spinor fields you don't do that.

I thought that there should be integration with respect to p_m as given in eq. (9.5.56).

Any help will be much appreciated.

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# Weinberg, Vol. 1: Path Integrals Query

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