The Dark Universe in Phase Space
IFPU
17 – 21 November 2025
Understanding the dark universe remains a major challenge in fundamental physics. A key approach is to study the cosmological imprints of hypothetical dark particles, a strategy set to benefit from upcoming data. Accurately tracking their evolution and abundances is essential for linking them to cosmological observables. Current analyses often rely on approximations, assuming a thermal phase space distribution. However, recent theoretical advances and new observations call for a more precise approach: following the full phase space distribution of dark particles over cosmic history. This presents significant computational challenges, requiring the solution of integro-differential equations in a high-dimensional space. This focus week will assess the state of the field and key challenges. We will explore (i) the prospects for phase space analyses of dark particles and their role in constraining cosmological observables, and (ii) practical strategies to overcome the computational challenges of tracking their phase space distribution across cosmological time scales.
Meeting webpage: https://sites.google.com/view/darkphasespace25
Organisers:
- Francesco D’Eramo (University of Padua, INFN Padua)
- Dimitros Karamitros (University of Jyvaskyla)
- Alessandro Lenoci (Hebrew University of Jerusalem)
- Matteo Viel (SISSA, INFN Trieste)
Participants:
- Marcin Badziak (Institute of Theoretical Physics, University of Warsaw)
- Tobias Binder (Technical University of Munich)
- Torsten Bringmann (University of Oslo)
- Francesco D’Eramo (University of Padua & INFN Padua)
- Martina Gerbino (INFN Ferrara)
- Andreas Goudelis (Laboratoire de Physique de Clermont Auvergne (LPCA), CNRS/Université Clermont Auvergne)
- Matti Heikinheimo (University of Helsinki and Helsinki Institute of Physics)
- Andrzej Hryczuk (National Centre for Nuclear Research, Poland)
- Fei Huang (Weizmann Institute of Science)
- Ayuki Kamada (University of Warsaw)
- Dimitrios Karamitros (University of Padua & INFN Padua)
- Massimiliano Lattanzi (INFN Ferrara)
- Oleg Lebedev (University of Helsinki)
- Alessandro Lenoci (The Hebrew University of Jerusalem)
- Stefano Moretti (Southampton University (UK) & Uppsala University (SE))
- Simona Vegetti (Max Planck for Astrophysics)