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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

TL;DR: In this article, it was shown that in a class of well-motivated single-field models, inflation is followed by self resonance, leading to copious oscillon generation and a lengthy period of oscillon domination.

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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Journal ArticleDOI

Signals of Inflationary Models with Cosmic Strings

TL;DR: A class of well-motivated models of inflation end by producing cosmic strings is discussed in this paper, with a particular emphasis on cosmic strings and on the Cosmic Microwave Background signal.
Journal ArticleDOI

Phase Transitions in an Expanding Universe: Stochastic Gravitational Waves in Standard and Non-Standard Histories

TL;DR: In this article, a detailed analysis of stochastic gravitational wave production from cosmological phase transitions in an expanding universe was performed, where the authors studied both a standard radiation as well as a matter dominated history.
Journal ArticleDOI

What can cosmology tell us about gravity? Constraining Horndeski gravity with $\Sigma$ and $\mu$

TL;DR: In this paper, the authors consider the general Horndeski class of single-field scalar-tensor theories with second-order equations of motion and find several consistency conditions that make it possible to rule out broad classes of theories based on measurements of ε and ε that are independent of their parametric forms.
Journal ArticleDOI

Gauge coupling unification and nonequilibrium thermal dark matter.

TL;DR: It is shown that the dark matter abundance, while never having achieved thermal equilibrium, is fixed shortly after the reheating epoch by the relation T(RH)(3)/M(int)(4), and the unification of gauge couplings which determines M(int) also fixes the reheater temperature.
Journal ArticleDOI

Nonlocal gravity. Conceptual aspects and cosmological predictions

TL;DR: In this paper, a model for nonlocal gravity in the infrared was proposed, where the nonlocal term acts as an effective dark energy with a phantom equation of state, providing accelerated expansion without a cosmological constant.
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