Question

Verify that crossing relation (4.42) is of the form $$ \Re_{e^{-} e^{+}}(s, t, u)=\Re_{e^{-} e^{-}}(u, t, s) $$

   Verify that crossing relation (4.42) is of the form
$$
\Re_{e^{-} e^{+}}(s, t, u)=\Re_{e^{-} e^{-}}(u, t, s)
$$

Quarks and leptons: introductory course in modern particle physics

Quarks and leptons: introductory course in modern particle physics

Francis Halzen, Alan… 1st Edition

Chapter 4, Problem 9

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In particle physics, the crossing relation is a property of scattering amplitudes which states that the amplitude for a certain process involving particles and antiparticles can be obtained from another process by exchanging the roles of particles going into and Show more…

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Verify that crossing relation (4.42) is of the form $$ \Re_{e^{-} e^{+}}(s, t, u)=\Re_{e^{-} e^{-}}(u, t, s) $$

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