On the Bispectra of Very Massive Tracers in the Effective Field Theory of Large-Scale Structure

Understand

The Effective Field Theory of Large-Scale Structure (EFTofLSS) provides a consistent perturbative framework for describing the statistical distribution of cosmological large-scale structure.

• In a previous EFTofLSS calculation that involved the one-loop power spectra and tree-level bispectra, it was shown that the $k$-reach of the prediction for biased tracers is comparable for all investigated masses if suitable higher-derivative biases, which are less suppressed for more massive tracers, are added.
• However, it is possible that the non-linear biases grow faster with tracer mass than the linear bias, implying that loop contributions could be the leading correction to the bispectra.
• To check this, we include the one-loop contributions in a fit to numerical data in the limit of strongly enhanced higher-order biases.