Lagrangian I have is little bit massy so I don't write in here.(adsbygoogle = window.adsbygoogle || []).push({});

Like in ψψ(dagger) , or ψ∅ -> ψ∅, How can I calculate the differential cross section or total, or amplitudes?

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# How can I calculate the differential cross section, amplitude for given Lagrangian?

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