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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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Spinning-black-hole scattering and the test-black-hole limit at second post-Minkowskian order

TL;DR: In this article, a simple extension of the 2PM mapping to 2PM order was proposed for BH spins aligned with the orbital angular momentum, which could be employed in the construction of improved effective-one-body models for the conservative dynamics of inspiraling spinning binary BHs.
Journal ArticleDOI

Radial distribution of the diffuse γ-ray emissivity in the Galactic disk

TL;DR: In this article, the Fermi-LAT data accumulated over 7 years of $\ensuremath{\gamma}$-ray observations, together with the high resolution gas (CO HI) and the dust opacity maps, are used to study the emissivity of cosmic rays (CRs) induced by interactions of CRs with the interstellar medium.
Journal ArticleDOI

Radio Signals from Axion Dark Matter Conversion in Neutron Star Magnetospheres.

TL;DR: It is shown that axion dark matter may be detectable through narrow radio lines emitted from neutron stars, and the axion-photon mixing equations are solved, including a full treatment of the magnetized plasma, to obtain the conversion probability.
Journal ArticleDOI

Observational Searches for Star-Forming Galaxies at z > 6

TL;DR: In this paper, the selection techniques for finding distant galaxies, including a summary of previous and ongoing ground and space-based searches, and spectroscopic follow-up efforts, are discussed.
Journal ArticleDOI

Black holes as particle detectors: evolution of superradiant instabilities

TL;DR: In this paper, a quasi-adiabatic, fully-relativistic analysis of the evolution of the instability of a rotating black hole is presented, showing that the mass of the scalar cloud developed through superradiance can be a sizeable fraction of the black-hole mass, but its energy-density is very low and backreaction is negligible.
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