Why is it that the differential cross section for processes like Inverse Muon Decay (IMD) are always given in the CM frame? Every paper I have seen that discusses Inverse Muon Decay gives the differential cross section in CM frame. Is it very hard to calculate the differential cross section in the lab frame where the electron is at rest?(adsbygoogle = window.adsbygoogle || []).push({});

To be clear, IMD is this process:

[itex]\nu[/itex]_{[itex]\mu[/itex]}+ e [itex]\rightarrow[/itex] [itex]\nu[/itex]_{e}+ [itex]\mu[/itex]

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# Inverse Muon Decay differential cross section

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