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- W3103318728 abstract "We have continued the development of Lagrangian, cosmological perturbation theory for the low-order correlators of the matter density field. We provide a new route to understanding how the effective field theory (EFT) of large-scale structure can be formulated in the Lagrandian framework and a new resummation scheme, comparing our results to earlier work and to a series of high-resolution N-body simulations in both Fourier and configuration space. The `new' terms arising from EFT serve to tame the dependence of perturbation theory on small-scale physics and improve agreement with simulations (though with an additional free parameter). We find that all of our models fare well on scales larger than about two to three times the non-linear scale, but fail as the non-linear scale is approached. This is slightly less reach than has been seen previously. At low redshift the Lagrangian model fares as well as EFT in its Eulerian formulation, but at higher $z$ the Eulerian EFT fits the data to smaller scales than resummed, Lagrangian EFT. All the perturbative models fare better than linear theory." @default.
- W3103318728 created "2020-11-23" @default.
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- W3103318728 date "2015-09-02" @default.
- W3103318728 modified "2023-09-30" @default.
- W3103318728 title "A Lagrangian effective field theory" @default.
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- W3103318728 doi "https://doi.org/10.1088/1475-7516/2015/09/014" @default.
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