To strengthen the coordination of Astroparticle Theory in Europe the EuCAPT Steering Committee has initiated the procedure that will lead to a White Paper addressed to the whole community and whose primary goal is to identify and focus on the opportunities in our field for the next decade. As such, the White Paper will emphasise the upcoming theoretical opportunities and challenges, with particular attention to the possible synergies among the different fields. The topics, the corresponding coordinators and the dedicated channels on the Mattermost community platform https://mattermost.web.cern.ch/eucapt are:
· Dark Matter (C. Byrnes, F. Calore, D. Marsh), https://mattermost.web.cern.ch/eucapt/channels/white-paper---dark-matter
· Dark Energy (J. Lesgourgues, A. Silvestri), https://mattermost.web.cern.ch/eucapt/channels/white-paper---dark-energy
· Cosmic Accelerators (S. Markoff, E. Ramirez-Ruiz), https://mattermost.web.cern.ch/eucapt/channels/white-paper---cosmic-accelerators
· Cosmic Rays (D. Gaggero, K. Kotera), https://mattermost.web.cern.ch/eucapt/channels/white-paper---cosmic-rays
· Dynamical Spacetimes (P. Moesta, R. Porto), https://mattermost.web.cern.ch/eucapt/channels/white-paper---dynamical-spacetimes
· Early Universe (D. Baumann, L. Covi), https://mattermost.web.cern.ch/eucapt/channels/white-paper---early-universe
· Nuclear Astrophysics (T. Galatyuk, T. Hinderer), https://mattermost.web.cern.ch/eucapt/channels/white-paper---nuclear-astrophysics
· Neutrino Properties (O. Mena, T. Schwetz-Mangold), https://mattermost.web.cern.ch/eucapt/channels/white-paper---low-energy-neutrinos
· Particles from Stars (A. Serenelli, I. Tamborra), https://mattermost.web.cern.ch/eucapt/channels/white-paper---particles-from-stars
· Astrostatistics (R. Trotta, C. Weniger), https://mattermost.web.cern.ch/eucapt/channels/white-paper---astrostatistics
A maximum of five pages will be dedicated to each topic, and those interested in this effort are invited to participate in the brainstorming sessions at the forthcoming EuCAPT Annual Symposium on May 5, 2021.
