Timeline for What's the "propagator for real particles"?
Current License: CC BY-SA 4.0
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| when toggle format | what | by | license | comment | |
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| Oct 30, 2019 at 10:08 | history | edited | jak | CC BY-SA 4.0 |
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| Oct 30, 2019 at 9:44 | comment | added | jak | @ohneVal Thanks. If post this comment as an answer I can accept it. | |
| Oct 30, 2019 at 9:21 | comment | added | ohneVal | Virtual is usually a term used to describe propagators that are not subject to the on-shell condition, these appear in intermediate states in Feynman diagrams but that's the only difference. One normally calls particles that are on shell, I.e. they follow $E^2-m^2=p^2$, real. So the simple answer is, it is the Feynman propagator plus the on-shell condition, that means integrating four momenta subject to $k_0 = \sqrt{p^2+m^2}$. | |
| Oct 30, 2019 at 8:56 | history | answered | jak | CC BY-SA 4.0 |