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Beyond ΛCDM: Problems, solutions, and the road ahead

TLDR
There is a persistent interest in extending cosmology beyond the standard model, ΛCDM, motivated by a range of apparently serious theoretical issues, involving such questions as the cosmological constant problem, the particle nature of dark matter, the validity of general relativity on large scales, the existence of anomalies in the CMB and on small scales, and the predictivity and testability of the inflationary paradigm as mentioned in this paper.
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This article is published in Physics of the Dark Universe.The article was published on 2016-06-01 and is currently open access. It has received 378 citations till now. The article focuses on the topics: Cosmological constant problem.

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Sterile neutrino Dark Matter

TL;DR: A comprehensive overview of the current status of the research on sterile neutrino Dark Matter can be found in this paper, where the authors discuss the motivation and limits obtained through astrophysical observations.
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Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies

Elcio Abdalla, +202 more
TL;DR: In this paper , the authors focus on the 5.0σ tension between the Planck CMB estimate of the Hubble constant H0 and the SH0ES collaboration measurements and discuss the importance of trying to fit a full array of data with a single model.
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A systematic approach to generalisations of General Relativity and their cosmological implications

TL;DR: A review of the recent progress in constructing consistent field theories of gravity based on additional scalar, vector and tensor fields can be found in this article, where the authors discuss theories with Galileons, with Lagrange densities as constructed by Horndeski and beyond, extended to DHOST interactions, or several Proca fields, as well as bigravity theories and scalar-vector-tensor theories.
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Tests of chameleon gravity

TL;DR: A review of the state-of-the-art searches for screened scalars coupled to matter can be found in this article, where the authors summarize the results of these searches and discuss the future prospects for constraining screened modified gravity models further using upcoming and planned experiments.
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Fundamental physics with the Square Kilometre Array

Amanda Weltman, +60 more
TL;DR: The Square Kilometre Array (SKA) is a planned large radio interferometer designed to operate over a wide range of frequencies, and with an order of magnitude greater sensitivity and survey speed than any current radio telescope as mentioned in this paper.
References
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Journal ArticleDOI

A new look at the statistical model identification

TL;DR: In this article, a new estimate minimum information theoretical criterion estimate (MAICE) is introduced for the purpose of statistical identification, which is free from the ambiguities inherent in the application of conventional hypothesis testing procedure.
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Estimating the Dimension of a Model

TL;DR: In this paper, the problem of selecting one of a number of models of different dimensions is treated by finding its Bayes solution, and evaluating the leading terms of its asymptotic expansion.
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The Large N limit of superconformal field theories and supergravity

TL;DR: In this article, it was shown that the large-N limits of certain conformal field theories in various dimensions include in their Hilbert space a sector describing supergravityon the product of anti-de Sitter spacetimes, spheres, and other compact manifolds.
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