Talk:Ward–Takahashi identity

Added the actual formulas for the identity
I added the actual formulas for the Ward-Takahashi identity and for the Ward identity (since Ward identity redirects here). HEL 00:17, 5 November 2006 (UTC)

There is obviously a mistake
There is obviously a mistake in this formula. I don't feel qualified enough to edit it myself, but I believe the last integral should be a path integral (instead of being a space-time integral). Thanks.


 * $$\int \delta_\epsilon \left(\mathcal{F} e^{iS}\right) \mathcal{D}\phi = \int \epsilon \lambda \mathcal{F} e^{iS} \mathrm{d}^dx $$ — Preceding unsigned comment added by 2A02:6B8:0:408:36E6:D7FF:FE1D:A653 (talk) 10:40, 30 July 2015 (UTC)

Could anybody comment on how to express the rather abstract expression into the explicit expression for the Ward-Takahashi identity
The abstract expression from the path integral formalism does not seem to be so friendly expressible to the explicit expression given at the beginning of the page. Can anybody help on establishing the link between these? True bsmile 14:08, 14 Janunary 2010 (UTC)

And what is the connection with Noether's theorem except that Mμ formally looks like a conserved current in momentum space? Well, that's explained a bit in the last section. I would still like to see some more exposition though. YohanN7 (talk) 12:14, 28 January 2013 (UTC)