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Slides from the talk - CP3-Origins

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The matter bispectrum and PNG: large scales<br />

In Perturbation Theory ...<br />

P = P 0 + P loop<br />

G<br />

[P 0]+P loop<br />

NG [P 0,B 0 ]<br />

matter power spectrum<br />

Linear power<br />

spectrum<br />

Gravity-induced<br />

contributions<br />

(depending on P0 alone)<br />

Additional gravity-induced contributions<br />

present only for NG initial conditions (B0)<br />

B = B 0 + B tree<br />

G<br />

[P 0 ]+B loop<br />

G<br />

[P 0]+B loop<br />

NG [P 0,B 0 ]<br />

& bispectrum<br />

Primordial<br />

component<br />

If B0 was <strong>the</strong> only effect of NG initial conditions on <strong>the</strong> LSS<br />

<strong>the</strong>n future, large volume surveys (~100 Gpc 3 ) could<br />

provide:<br />

ΔfNL local < 5 and ΔfNL eq < 10<br />

Scoccimarro, ES & Zaldarriaga (2004), ES & Komatsu (2007)

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