Snowmass white paper: Effective field theories in cosmology

Cabass, Giovanni; Ivanov, Mikhail M.; Lewandowski, Matthew; Mirbabayi, Mehrdad; Simonović, Marko

doi:10.1016/j.dark.2023.101193

Cited by 28 publications

(18 citation statements)

References 474 publications

(434 reference statements)

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“…6 To solve the Boltzmann equations in the presence of IDM, we use a modified version of the Boltzmann solver CLASS, which allows for DM-baryon scattering parameterized by a momentum transfer cross section σ 0 . 7 In order to make a prediction for late-time evolution of the matter power spectrum on scales corresponding to galaxy clustering, weak lensing, and related LSS observables, we merge the modified IDM CLASS code with a CLASS-PT module, previously developed as a tool for the computation of LSS power spectra in the mildly nonlinear regime (Baumann et al 2012;Carrasco et al 2012;Cabass et al 2023;Ivanov 2022). 8 CLASS-PT is a nonlinear perturbation theory extension of CLASS that calculates nonlinear 1-loop corrections to the linear matter power spectrum and outputs the redshift-space galaxy power spectrum (Chudaykin et al 2020).…”

Section: Matter Perturbations In Idmmentioning

confidence: 99%

S₈ Tension in the Context of Dark Matter–Baryon Scattering

He,

Ivanov,

et al. 2023

ApJL

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We explore an interacting dark matter (IDM) model that allows for a fraction of dark matter (DM) to undergo velocity-independent scattering with baryons. In this scenario, structure on small scales is suppressed relative to the cold DM scenario. Using the effective field theory of large-scale structure, we perform the first systematic analysis of BOSS full-shape galaxy clustering data for the IDM scenario, and we find that this model ameliorates the S 8 tension between large-scale structure and Planck data. Adding the S 8 prior from the Dark Energy Survey (DES) to our analysis further leads to a mild ∼3σ preference for a nonvanishing DM–baryon scattering cross section, assuming ∼10% of DM is interacting and has a particle mass of 1 MeV. This result produces a modest ∼20% suppression of the linear power at k ≲ 1 h Mpc−1, consistent with other small-scale structure observations. Similar scale-dependent power suppression was previously shown to have the potential to resolve S 8 tension between cosmological data sets. The validity of the specific IDM model explored here will be critically tested with upcoming galaxy surveys at the interaction level needed to alleviate the S 8 tension.

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Section: Matter Perturbations In Idmmentioning

confidence: 99%

S₈ Tension in the Context of Dark Matter–Baryon Scattering

He,

Ivanov,

et al. 2023

ApJL

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“…Whilst analytic methods for bispectrum convolution now exist (at least for the monopole, see [e.g., 52,53] for recent progress), this route still leads to a significant amplification in model complexity, which may make typical Monte Carlo Markov Chain (MCMC) analyses (with ∼ 10 6 steps [54]) infeasible. Our efforts herein are a natural extension of our previous full-shape BOSS analyses of the galaxy power spectrum [55][56][57], BAO [58], real-space power spectrum proxy [59], and bispectrum monopole [16,60,61], based on the effective field theory of large-scale structure (EFTofLSS; [62][63][64][65]). Alternative BOSS full-shape P + Q 0 + B 0 0.140 +0.010 Table 1.…”

Section: Introductionmentioning

confidence: 99%

Cosmology with the Galaxy Bispectrum Multipoles: Optimal Estimation and Application to BOSS Data

Ivanov¹,

Philcox²,

Cabass³

et al. 2023

Preprint

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We present a framework for self-consistent cosmological analyses of the full-shape anisotropic bispectrum, including the quadrupole ( = 2) and hexadecapole ( = 4) moments. This features a novel window-free algorithm for extracting the latter quantities from data, derived using a maximum-likelihood prescription. Furthermore, we introduce a theoretical model for the bispectrum multipoles (which does not introduce new free parameters), and test both aspects of the pipeline on several high-fidelity mocks, including the PT Challenge suite of gigantic cumulative volume. This establishes that the systematic error is significantly below the statistical threshold, both for the measurement and modeling. As a realistic example, we extract the large-scale bispectrum multipoles from BOSS DR12 and analyze them in combination with the power spectrum data. Assuming a minimal ΛCDM model, with a BBN prior on the baryon density and a Planck prior on n s , we can extract the remaining cosmological parameters directly from the clustering data. The inclusion of the unwindowed higher-order ( > 0) large-scale bispectrum multipoles is found to moderately improve one-dimensional cosmological parameter posteriors (at the 5% − 10% level), though these multipoles are detected only in three out of four BOSS data segments at ≈ 5σ. Combining information from the power spectrum and bispectrum multipoles, the real space power spectrum, and the post-reconstructed BAO data, we find H 0 = 68.2 ± 0.8 km s −1 Mpc −1 , Ω m = 0.33 ± 0.01 and σ 8 = 0.736 ± 0.033 (the tightest yet found in perturbative full-shape analyses). Our estimate of the growth parameter S 8 = 0.77 ± 0.04 agrees with both weak lensing and CMB results. The estimators and data used in this work have been made publicly available.

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“…The covariant formulation for the EFT of curvature gravity with a single scalar field was originally studied by Weinberg [61], while the EFT of inflation around a fixed background was studied in [62]. Thus, it is a very active field of research, with important phenomenological applications to inflation, scalar-tensor theories, dark energy, gravitational waves and black holes [63][64][65][66][67][68][69][70] (for reviews on EFT formulation see [71][72][73]).…”

Section: Introductionmentioning

confidence: 99%

General effective field theory of teleparallel gravity

Mylova

Said

Saridakis

2023

Class. Quantum Grav.

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We construct the Eﬀective Field Theory (EFT) of the teleparallel equivalent of general relativity (TEGR). Firstly, we present the necessary ﬁeld redeﬁnitions of the scalar ﬁeld and the tetrads. Then we provide all the terms at next-to-leading-order, containing the torsion tensor and its derivatives, and derivatives of the scalar ﬁeld, accompanied by generic scalar-ﬁeld-dependent couplings, where all operators are suppressed by a scale Λ. Removing all redundant terms using the ﬁeld redeﬁnitions we result to the EFT of TEGR, which includes signiﬁcantly more terms comparing to the EFT of General Relativity. Finally, we present an application in a cosmological framework. Interestingly enough, although GR and TEGR are completely equivalent at the level of classical equations, we ﬁnd that their corresponding EFTs possess minor but non-zero diﬀerences. Hence, we do verify that at higher energies the excitation and the features of the extra degrees of freedom are slightly diﬀerent in the two theories, thus making them theoretically distinguishable. Nevertheless, we mention that these diﬀerences are suppressed by the heavy mass scale Λ and thus it is not guaranteed that they could be measured in future experiments and observations.

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Snowmass white paper: Effective field theories in cosmology

Cited by 28 publications

References 474 publications

S₈ Tension in the Context of Dark Matter–Baryon Scattering

S₈ Tension in the Context of Dark Matter–Baryon Scattering

Cosmology with the Galaxy Bispectrum Multipoles: Optimal Estimation and Application to BOSS Data

General effective field theory of teleparallel gravity

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Snowmass white paper: Effective field theories in cosmology

Cited by 28 publications

References 474 publications

S8 Tension in the Context of Dark Matter–Baryon Scattering

S8 Tension in the Context of Dark Matter–Baryon Scattering

Cosmology with the Galaxy Bispectrum Multipoles: Optimal Estimation and Application to BOSS Data

General effective field theory of teleparallel gravity

Contact Info

Product

Resources

About

S₈ Tension in the Context of Dark Matter–Baryon Scattering

S₈ Tension in the Context of Dark Matter–Baryon Scattering