IRN Terascale @ Montpellier

Session

Dark Universe

26 nov. 2025, 09:00

13. XLZD Sensitivity to WIMPs via the Migdal Effect

Lorenzo Principe (SUBATECH)

26/11/2025 09:00

Dark Universe

This talk presents a projected sensitivity for the XLZD detector to Weakly Interacting Massive Particles (WIMPs) via the Migdal effect. For very light WIMPs, the nuclear recoils they induce are often below detection threshold, but the associated Migdal ionisations may still produce detectable signals. The study models the expected Migdal ionisation signal and background response under...

20. The Hubble tension: A health check of cosmological models

Dr Elsa Teixeira (LUPM Montpellier)

26/11/2025 09:30

Dark Universe

Review talk on the Hubble tension

9. No room for monopole dark matter

Théodore Fischer (LUPM)

26/11/2025 10:00

Dark Universe

The magnetic monopole of a dark sector has been advocated as an appealing dark matter candidate. We recently revisited the computation of the monopole abundance, produced by a thermal phase transition in the minimal 't Hooft-Polyakov model. We explored the three regimes where the phase transition is second order, weakly first order, or supercooled, identifying the regions of parameter space...

14. Freeze-in with low reheating temperature

Thomas REGGIO (LPCA)

26/11/2025 11:00

Dark Universe

The freeze-in mechanism is an alternative mechanism for dark matter production to standard thermal freeze-out. Freeze-in computations are typically performed assuming a very high initial ("reheating") temperature. However, this temperature is poorly constrained and can take relatively small values. I will discuss dark matter freeze-in in such a scenario and highlight how dark matter production...

21. Ultra-Relativistic Freeze-Out During Reheating

Mathieu GROSS (IJCLab)

26/11/2025 11:30

Dark Universe

Dark matter remains one of the major puzzles of both modern cosmology and particle physics. While the freeze-out mechanism is getting more and more constrained, motivating revisions during non-standard cosmologies such as reheating, the freeze-in mechanism is intrinsically difficult to probe, motivating people to invoke stronger couplings. In this talk, I will present an alternative through...