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EuCAPT White Paper: Opportunities and Challenges for Theoretical Astroparticle Physics in the Next Decade

R. Alves Batista, +131 more
TLDR
The European Consortium for Astroparticle Theory (EuCAPT) white paper as mentioned in this paper explores upcoming theoretical opportunities and challenges for our field of research with particular emphasis on the possible synergies among different subfields, and the prospects for solving the most fundamental open questions with multi-messenger observations.
Abstract
Astroparticle physics is undergoing a profound transformation, due to a series of extraordinary new results, such as the discovery of high-energy cosmic neutrinos with IceCube, the direct detection of gravitational waves with LIGO and Virgo, and many others. This white paper is the result of a collaborative effort that involved hundreds of theoretical astroparticle physicists and cosmologists, under the coordination of the European Consortium for Astroparticle Theory (EuCAPT). Addressed to the whole astroparticle physics community, it explores upcoming theoretical opportunities and challenges for our field of research, with particular emphasis on the possible synergies among different subfields, and the prospects for solving the most fundamental open questions with multi-messenger observations.

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Citations
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The Observation of Gravitational Waves from a Binary Black Hole Merger

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Bow-Shock Pulsar Wind Nebulae Searches Aided by the North American Nanohertz Observatory for Gravitational Waves

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Oscillons after Inflation

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A Reverse Shock in GRB 130427A

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Posted Content

A response to O. Arandjelovic's critique of "The reproducibility of research and the misinterpretation of p-values"

TL;DR: The main criticism of my piece in this article seems to be that my calculations rely on testing a point null hypothesis, i.e. the hypothesis that the true effect size is zero.
References
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Testing General Relativity in Cosmology

TL;DR: A review of recent developments and results in testing general relativity (GR) at cosmological scales is presented in this paper, where the authors provide an overall picture of the subject and an entry point to students and researchers interested in joining the field.
Journal ArticleDOI

Early kinetic decoupling of dark matter: When the standard way of calculating the thermal relic density fails

TL;DR: In this paper, it was shown that the existence of local thermal equilibrium during the freeze out of annihilating dark matter particles does not always hold, and two methods for dealing with such a situation were proposed.
Journal ArticleDOI

Constraining the axion-photon coupling with massive stars.

TL;DR: It is pointed out that stars in the mass window ~8-12M([circumpunct]) can serve as sensitive probes of the axion-photon interaction, g(Aγγ), and conservatively finds g( Aγγ)
Journal ArticleDOI

Gravitational Wave signatures of inflationary models from Primordial Black Hole Dark Matter

TL;DR: In this paper, the amplitude and the range of frequencies of the primordial black hole signal depend on the statistics (Gaussian versus Ω(n) 2 ) of the curvature fluctuations, and on the evolution of the PBH mass function due to accretion and merging.
Journal ArticleDOI

keV sterile neutrino dark matter from singlet scalar decays: the most general case

TL;DR: In this article, the early Universe production of sterile neutrino Dark Matter by the decays of singlet scalars is investigated. But the authors focus on how to incorporate bounds from structure formation on the level of the linear power spectrum, since the simplistic estimate using the free streaming horizon clearly fails for highly nonthermal distributions.
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