Peeking into the next decade in Large-Scale Structure Cosmology with its Effective Field Theory - INSPIRE

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Peeking into the next decade in Large-Scale Structure Cosmology with its Effective Field Theory

Diogo Braganca
(
- Stanford U., ITP and
- KIPAC, Menlo Park
)
,
Yaniv Donath
(
- Cambridge U., DAMTP
)
,
Leonardo Senatore
(
- Zurich, ETH
)
,
Henry Zheng
(
- Stanford U., ITP and
- KIPAC, Menlo Park
)

Jul 10, 2023

52 pages

e-Print:

2307.04992 [astro-ph.CO]

View in:

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Abstract: (arXiv)

After the successful full-shape analyses of BOSS data using the Effective Field Theory of Large-Scale Structure, we investigate what upcoming galaxy surveys might achieve. We introduce a ``perturbativity prior" that ensures that loop terms are as large as theoretically expected, which is effective in the case of a large number of EFT parameters. After validating our technique by comparison with already-performed analyses of BOSS data, we provide Fisher forecasts using the one-loop prediction for power spectrum and bispectrum for two benchmark surveys: DESI and MegaMapper. We find overall great improvements on the cosmological parameters. In particular, we find that MegaMapper (DESI) should obtain at least a 12

\sigma

(

2\sigma

) evidence for non-vanishing neutrino masses, bound the curvature

\Omega_k

to 0.0012 (0.012), and primordial inflationary non-Gaussianities as follows:

f_{\text{NL}}^{\text{loc.}}

to

\pm 0.26

(3.3),

f_{\text{NL}}^{\text{eq.}}

to

\pm16

(92),

f_{\text{NL}}^{\text{orth.}}

to

\pm 4.2

(27). Such measurements would provide much insight on the theory of Inflation. We investigate the limiting factor of shot noise and ignorance of the EFT parameters.

Note:

38+14 pages, 12 figures, 8 tables

neutrino: mass
inflation: non-Gaussianity
effective field theory
DESI
structure
power spectrum
noise
bispectrum
benchmark
curvature

References(125)

Figures(23)

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,
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