332 citations · 3.6k across the 37 of their papers we have counts for
37 papers
The two-loop bispectrum in the effective theory of large-scale structure
Tobias Baldauf, Mathias Garny, Petter Taule +1
We study the bispectrum of large-scale structure in the EFTofLSS including corrections up to two-loop. We derive an analytic result for the double-hard limit of the two-loop correc…
The two-loop bispectrum of large-scale structure
Tobias Baldauf, Mathias Garny, Petter Taule +1
The bispectrum is the leading non-Gaussian statistic in large-scale structure, carrying valuable information on cosmology that is complementary to the power spectrum. To access thi…
Precise Calibration of the One-Loop Trispectrum in the Effective Field Theory of Large Scale Structure
Theodore Steele, Tobias Baldauf
The Large-Scale Structure (LSS) of the universe has the potential to provide decisive answers to the remaining open questions in cosmology. Early attempts at modelling it analytica…
Non-perturbative halo clustering from cosmological density peaks
Tobias Baldauf, Sandrine Codis, Vincent Desjacques +1
Associating the formation sites of haloes with the maxima of the smoothed linear density field, we present non-perturbative predictions for the Lagrangian and evolved halo correlat…
Precise Calibration of the One-Loop Bispectrum in the Effective Field Theory of Large Scale Structure
Theodore Steele, Tobias Baldauf
The bispectrum is the leading non-Gaussian statistic in Large-Scale Structure (LSS) clustering and encodes the interactions in the underlying field. It is thus an important diagnos…
Projected two- and three-point statistics: Forecasts and mitigation of non-linear RSDs
Oliver Leicht, Tobias Baldauf, James Fergusson +1
The combination of two- and three-point clustering statistics of galaxies and the underlying matter distribution has the potential to break degeneracies between cosmological parame…
Density reconstruction from biased tracers and its application to primordial non-Gaussianity
Omar Darwish, Simon Foreman, Muntazir M. Abidi +3
Large-scale Fourier modes of the cosmic density field are of great value for learning about cosmology because of their well-understood relationship to fluctuations in the early uni…
Primordial non-Gaussianity without tails -- how to measure fNL with the bulk of the density PDF
Oliver Friedrich, Cora Uhlemann, Francisco Villaescusa-Navarro +3
We investigate the possibility to detect primordial non-Gaussianity by analysing the bulk of the probability distribution function (PDF) of late-time cosmic density fluctuations. F…
Primordial Non-Gaussianity
P. Daniel Meerburg, Daniel Green, Muntazir Abidi +175
Our current understanding of the Universe is established through the pristine measurements of structure in the cosmic microwave background (CMB) and the distribution and shapes of…
Cubic Halo Bias in Eulerian and Lagrangian Space
Muntazir Mehdi Abidi, Tobias Baldauf
Predictions of the next-to-leading order, i.e. one-loop, halo power spectra depend on local and non-local bias parameters up to cubic order. The linear bias parameter can be estima…
Cosmological Perturbation Theory Using the FFTLog: Formalism and Connection to QFT Loop Integrals
Marko Simonović, Tobias Baldauf, Matias Zaldarriaga +2
We present a new method for calculating loops in cosmological perturbation theory. This method is based on approximating a CDM-like cosmology as a finite sum of complex power-la…
Iterative initial condition reconstruction
Marcel Schmittfull, Tobias Baldauf, Matias Zaldarriaga
Motivated by recent developments in perturbative calculations of the nonlinear evolution of large-scale structure, we present an iterative algorithm to reconstruct the initial cond…
Phenomenology of BAO evolution from Lagrangian to Eulerian Space
Tobias Baldauf, Vincent Desjacques
The baryon acoustic oscillation (BAO) feature provides an important distance scale for the measurement of the expansion history of the Universe. Theoretical models of the BAO in th…
Verifying the consistency relation for the scale-dependent bias from local primordial non-Gaussianity
Matteo Biagetti, Titouan Lazeyras, Tobias Baldauf +2
We measure the large-scale bias of dark matter halos in simulations with non-Gaussian initial conditions of the local type, and compare this bias to the response of the mass functi…
LSS constraints with controlled theoretical uncertainties
Tobias Baldauf, Mehrdad Mirbabayi, Marko Simonović +1
Forecasts and analyses of cosmological observations often rely on the assumption of a perfect theoretical model over a defined range of scales. We explore how model uncertainties a…
Linear response to long wavelength fluctuations using curvature simulations
Tobias Baldauf, Uroš Seljak, Leonardo Senatore +1
We study the local response to long wavelength fluctuations in cosmological -body simulations, focusing on the matter and halo power spectra, halo abundance and non-linear trans…
Peak exclusion, stochasticity and convergence of perturbative bias expansions in 1+1 gravity
Tobias Baldauf, Sandrine Codis, Vincent Desjacques +1
The Lagrangian peaks of a 1D cosmological random field representing dark matter are used as a proxy for a catalogue of biased tracers in order to investigate the small-scale exclus…
On the reach of perturbative methods for dark matter density fields
Tobias Baldauf, Emmanuel Schaan, Matias Zaldarriaga
We study the mapping from Lagrangian to Eulerian space in the context of the Effective Field Theory (EFT) of Large Scale Structure. We compute Lagrangian displacements with Lagrang…
The Effective Field Theory of Large Scale Structure at Two Loops: the apparent scale dependence of the speed of sound
Tobias Baldauf, Lorenzo Mercolli, Matias Zaldarriaga
We study the Effective Field Theory of Large Scale Structure for cosmic density and momentum fields. We show that the finite part of the two-loop calculation and its counterterms i…
On the reach of perturbative descriptions for dark matter displacement fields
Tobias Baldauf, Emmanuel Schaan, Matias Zaldarriaga
We study Lagrangian Perturbation Theory (LPT) and its regularization in the Effective Field Theory (EFT) approach. We evaluate the LPT displacement with the same phases as a corres…
Equivalence Principle and the Baryon Acoustic Peak
Tobias Baldauf, Mehrdad Mirbabayi, Marko Simonović +1
We study the dominant effect of a long wavelength density perturbation on short distance physics. In the non-relativistic limit, the result is a uniform acceleration, fixe…
Testing Inflation with Large Scale Structure: Connecting Hopes with Reality
Marcelo Alvarez, Tobias Baldauf, J. Richard Bond +25
The statistics of primordial curvature fluctuations are our window into the period of inflation, where these fluctuations were generated. To date, the cosmic microwave background h…
Near optimal bispectrum estimators for large-scale structure
Marcel Schmittfull, Tobias Baldauf, Uroš Seljak
Clustering of large-scale structure provides significant cosmological information through the power spectrum of density perturbations. Additional information can be gained from hig…
Lagrangian perturbation theory at one loop order: successes, failures, and improvements
Zvonimir Vlah, Uroš Seljak, Tobias Baldauf
We apply the convolved Lagrangian perturbation theory (CLPT) formalism, in which one can express the matter density power spectrum in terms of integrals over a function of cumulant…