I'm studying the $e^{+}e^{-}\rightarrow f^{+} f^{-}$ scattering, where $f$ is a generic fermion ($f^{\pm}\not=e^{\pm}$). I know the process is described by the $s$-channel, but why the $t$-channel or the $u$-channel can't describe it? How can I understand which channel to use to describe the process?
3
-
1$\begingroup$ Have your written down the Feynman diagrams involved in all s,t,u processes? $\endgroup$– Cosmas ZachosCommented Feb 10, 2020 at 17:43
-
$\begingroup$ see the answer here physics.stackexchange.com/questions/112957/… $\endgroup$– anna vCommented Feb 12, 2020 at 5:02
-
$\begingroup$ Related? physics.stackexchange.com/questions/330717/… $\endgroup$– SRSCommented Mar 1, 2020 at 6:43
Add a comment
|