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On the EFTofLSS in Redshift-Space | | Matthew Lewandowski
; Leonardo Senatore
; Francisco Prada
; Cheng Zhao
; Chia-Hsun Chuang
; | | Date: |
21 Dec 2015 | | Abstract: | We further develop the description of redshift space distortions within the
Effective Field Theory of Large Scale Structures. First, we generalize the
counterterms to include the effect of baryonic physics and primordial
non-Gaussianity. Second, we evaluate the IR-resummation of the dark matter
power spectrum in redshift space. This requires us to identify a controlled
approximation that makes the numerical evaluation straightforward and
efficient. Third, we compare the predictions of the theory at one loop with the
power spectrum from numerical simulations up to $ell=6$. We find that the
IR-resummation allows us to correctly reproduce the BAO peak. The $k$-reach, or
equivalently the precision for a given $k$, depends on additional counterterms
that need to be matched to simulations. Since the non-linear scale for the
velocity is expected to be longer than the one for the overdensity, we consider
a minimal and a non-minimal set of counterterms. The quality of our numerical
data makes it hard to firmly establish the performance of the theory at high
wavenumbers. Within this limitation, we find that the theory at redshift
$z=0.56$ and up to $ell=2$ matches the data to percent level approximately up
to $k sim 0.13 , h {
m Mpc^{-1}}$ or $k sim 0.18 , h {
m Mpc^{-1}}$,
depending on the number of counterterms used, with potentially large
improvement over former analytical techniques. | | Source: | arXiv, 1512.6831 | | Services: | Forum | Review | PDF | Favorites | |
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