Screening in perturbative approaches to LSS

Abstract

A specific value for the cosmological constant, Λ, can account for late-time cosmic acceleration. However, motivated by the so-called cosmological constant problem(s), several alternative mechanisms have been explored. To date, a host of well-studied dynamical dark energy and modified gravity models exists. Going beyond ΛCDM often comes with additional degrees of freedom (dofs). For these to pass existing observational tests, an efficient screening mechanism must be in place. The linear and quasi-linear regimes of structure formation are ideal probes of such dofs and can capture the onset of screening. We propose here a semi-phenomenological treatment to account for screening dynamics on LSS observables, with special emphasis on Vainshtein-type screening.

7 pages, two figures

References in corpus (5)

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• The IR-resummed Effective Field Theory of Large Scale Structures
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Cited by in corpus (14)

• Nonlinear Effective Theory of Dark Energy
• A comparison of Einstein-Boltzmann solvers for testing General Relativity
• Towards Precision Constraints on Gravity with the Effective Field Theory of Large-Scale Structure
• Testing (modified) gravity with 3D and tomographic cosmic shear
• Lagrangian perturbation theory for modified gravity
• An accurate perturbative approach to redshift space clustering of biased tracers in modified gravity
• Nonlinear evolution of initially biased tracers in modified gravity
• Convolution Lagrangian perturbation theory for biased tracers beyond general relativity
• Screenings in Modified Gravity: a perturbative approach
• The CMB lensing bi-spectrum as a probe of modified gravity theories
• fkPT: Constraining scale-dependent modified gravity with the full-shape galaxy power spectrum
• Growth of non-linear structures and spherical collapse in the Galileon Ghost Condensate model
• On the galaxy 3-point correlation function in Modified Gravity
• A Tale of Two Scales: Screening in Large Scale Structure