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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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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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Saturated overburden scattering and the multiscatter frontier: Discovering dark matter at the Planck mass and beyond

TL;DR: In this paper, underground experiments like LUX/LZ, PandaX-II, XENON, and PICO were used to discover dark matter up to the Planck mass and beyond.
Journal ArticleDOI

MeV-scale sterile neutrino decays at the Fermilab Short-Baseline Neutrino program

TL;DR: In this paper, the authors studied the potential for SBN to discover nearlysterile neutrinos through their subsequent decays in its detectors, and showed that the decays can be visible at SBN in a minimal and non-minimal extension of the Standard Model, and performed simulations to compute the parameter space constraints which could be placed in the absence of a signal.
Journal ArticleDOI

ARS Leptogenesis

TL;DR: In this paper, the current status of the leptogenesis scenario originally proposed by Akhmedov, Rubakov and Smirnov (ARS) is reviewed, where the right-handed neutrinos are at the electroweak scale or below and the CP-violating effects are induced by the coherent superposition of different right-hand mass eigenstates.
Journal ArticleDOI

Testing extreme-axion wave-like dark matter using the BOSS Lyman-alpha forest data

TL;DR: In this article, the authors compare the performance of the cold dark matter (CDM) model, the free-particle wave dark matter model and the extreme-axion wave darkmatter (EA$\psi$DM) models of different initial axion field angles against the BOSS Lyman-$\alpha$ forest absorption spectra with a fixed boson mass.
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