Identification of Dark Matter 2026

Session

Parallel Session - Cosmology

Cosmo

1 Jun 2026, 17:10

PilarSinues

Conveners

Parallel Session - Cosmology

• Javier Redondo (CAPA, DPTUZ)

98. Light, Warm and Noisy Dark Matter

Mustafa Amin (Rice University)

01/06/2026, 17:10

Cosmology DM

Oral presentation

Light post-inflationary axions are generically warm and noisy, leading to early, scale-dependent structure formation on observationally accessible scales. I will highlight results from a general, multi-species–friendly analytical framework, together with lattice numerical simulations, of such structure formation and its implications. In particular, the absence of both (1)...

19. Tracking Dark Matter through Cosmic Magnetism: Can the Footprint of Dark Matter Survive Nonlinear Evolution?

Marco José Molina Pradillo (Universitat de València)

01/06/2026, 17:30

Cosmology DM

Oral presentation

The origin and evolution of cosmological magnetic fields remain open problems with potential implications for physics beyond the standard cosmological model. In particular, several dark matter scenarios predict non-trivial interactions with primordial magnetic fields, either modifying their initial spectrum or imprinting characteristic signatures during structure formation. Assessing whether...

175. The spectrum of axions in a scaling string network

José Ricardo Correia (University of Oslo / Institute of Astrophysics)

01/06/2026, 17:50

Cosmology DM

Oral presentation

A promising dark matter candidate, which arises from a proposed solution to the strong CP problem is the pseudo scalar axion. If the PQ symmetry is broken after inflation, a network of cosmic strings forms and emits axions until the QCD phase transition, where a hybrid string-wall system forms and collapses. Characterizing both the evolution of the network and the emission of axions by the...

219. Seasons of Dark Matter Freeze-In Shaped by the Weather of the Early Universe

Tommaso Sassi (University of Padua, INFN Padua)

01/06/2026, 18:10

Cosmology DM

Oral presentation

Quantifying the imprints of freeze-in dark matter (DM) on cosmological structures requires the knowledge of its phase-space momentum distribution. We investigate how different cosmological histories before nucleosynthesis, what we refer to as “weather” of that epoch, give rise to distinct “seasons” in the DM momentum distribution that govern its warmness. Studying decay-driven production...