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• CommentRowNumber1.
• CommentAuthorUrs
• CommentTimeApr 18th 2020

starting something – not done yet, but need to save

• CommentRowNumber2.
• CommentAuthorUrs
• CommentTimeMay 2nd 2020
• (edited May 2nd 2020)

have added more actual content and details to the entry.

In particular, I made explicit the Lagrangian densities corresponding to the Dalitz decay Feynman amplitudes:

$\mathbf{L}_{rad} \;\sim\; d A \wedge d \pi^0 \wedge (\overline{L} \!\cdot\!\gamma_\mu \!\cdot\! L) d x^\mu$

for the radiative pion Dalitz decay, and

$\mathbf{L}_{sem} \;\sim\; d V \wedge d P \wedge (\overline{L} \!\cdot\!\gamma_\mu \!\cdot\! L) d x^\mu$

for the semileptonic Dalitz decay of a vector meson $V$ to a pseudoscalar $P$.

This is immediate enough, but none of the reference that I find ever bother to speak in terms of Lagrangian densities, they all just write Feynman amplitudes.

• CommentRowNumber3.
• CommentAuthorUrs
• CommentTimeSep 17th 2020