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

TL;DR

This white paper discusses the future opportunities and challenges in theoretical astroparticle physics, emphasizing multi-messenger observations and interdisciplinary collaboration to address fundamental questions in the field.

Contribution

It provides a comprehensive overview of upcoming theoretical challenges and opportunities in astroparticle physics, highlighting the importance of multi-messenger approaches and community collaboration.

Findings

Identification of key scientific opportunities for the next decade.

Recognition of challenges in integrating multi-messenger data.

Emphasis on interdisciplinary collaboration to solve fundamental questions.

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.