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2014

The Bispectrum in the Effective Field Theory of Large Scale Structure

Baldauf, Tobias, Mercolli, Lorenzo, Mirbabayi, Mehrdad et al.

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We study the bispectrum in the Effective Field Theory of Large Scale Structure, consistently accounting for the effects of short-scale dynamics.

We begin by proving that, as long as the theory is perturbative, it can be formulated to arbitrary order using only operators that are local in time.
We then derive all the new operators required to cancel the UV-divergences and obtain a physically meaningful prediction for the one-loop bispectrum.
In addition to new, subleading stochastic noises and the viscosity term needed for the one-loop power spectrum, we find three new effective operators.

The Bispectrum in the Effective Field Theory of Large Scale Structure · Around

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