 P13 contribution to the one-loop matter power spectrum

ID: p13-contribution-to-the-one-loop-matter-power-spectrum

Codex  0 Created 2026-09-28 Updated 2026-11-05

The

P_{13}

contribution correlates a linear density field with a third-order field:

P_{13} (k) = 3 P (k) \int \frac{d ^{3} q}{( 2 π ) ^{3}} F_{3} (k, q, - q) P (q) .

Both orderings contribute

2 P_{13}

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