Timeline for The poles of Feynman propagator in position space
Current License: CC BY-SA 3.0
5 events
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| May 3, 2015 at 11:20 | comment | added | Eden Harder | Yeah, they show the details of calculation. But I want someone to teach me how to finish the last step in the calculation shown in the post, i.e., $$ \frac{-1}{16\pi^2} \int_0^\infty d\beta~ e^{-\frac{i\beta x^2}{4}-\frac{i(m^2-i\epsilon)}{\beta}} $$ Many thanks! | |
| May 3, 2015 at 10:51 | comment | added | Herr_Mitesch | You have to use many integral representations of the Bessel functions for explicitly computing the propagator. Why don't you have a look on the computation here which may be exactly what you are looking for. The poles are found at $x²-i\epsilon$ = 0, so $t_{1/2} = \pm (|\vec{x}| + i \epsilon)$. | |
| May 3, 2015 at 2:13 | comment | added | Eden Harder | Thanks! Could you show your idea by formulas? | |
| May 2, 2015 at 22:27 | review | First posts | |||
| May 3, 2015 at 0:20 | |||||
| May 2, 2015 at 22:25 | history | answered | Herr_Mitesch | CC BY-SA 3.0 |