 Feynman parameter

ID: feynman-parameter

Codex  0 Created 2026-09-24 Updated 2026-09-24

\frac{1}{A B} = \int_{0}^{1} \frac{d x}{[ x A + ( 1 - x ) B ] ^{2}} .

After a momentum shift, this often converts a loop integral into a rotationally symmetric one.

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