Rencontres de Physique des Particules 2026

Session

Dark matter

12 mars 2026, 09:00

10. Review talk: Status and perspectives of Direct Dark Matter searches

Luca Scotto Lavina (LPNHE Paris)

12/03/2026 09:00

11. The Galactic Centre Excess via leptophilic dark matter in $U(1)_{L_i-L_j}$ models

Jordan Koechler (INFN Turin)

12/03/2026 09:40

The particle nature of dark matter remains one of the most important open questions in physics. An intriguing clue is the γ-ray excess observed by Fermi-LAT toward the Galactic Center, whose spectrum resembles the expected signal from annihilating weakly interacting massive particles. However, many conventional dark matter models are now strongly constrained by direct detection and collider...

12. Indirect searches for realistic sub-GeV Dark Matter models in present and upcoming observations

Arpan Kar (LPTHE, Sorbonne University)

12/03/2026 10:00

Indirect searches for Dark Matter (DM) particles with mass in the MeV - GeV scale have received significant attention lately. Pair-annihilations of such DM particles in the Galaxy can give rise to MeV - GeV gamma-rays via prompt emission, sub-GeV e+e-'s in cosmic-rays, as well as a broad photon spectrum ranging from X-rays to soft gamma-rays, produced by the secondary emissions from DM induced...

13. Freeze-in with low reheating temperature

Thomas REGGIO (LPCA)

12/03/2026 10:20

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...

14. Review talk: Gravitational probes of ultralight dark matter

Hyungjin Kim

12/03/2026 11:10

16. Piezoaxionic Detection of Axion Dark Matter with Precessing Nuclear Spins

Baraa Yahya (IPhT (CEA-SACLAY))

12/03/2026 11:50

The piezoaxionic effect enables the conversion of axion-induced nuclear Schiff moments into measurable voltages in piezoelectric crystals. We propose a heterodyne implementation in which controlled nuclear spin dynamics are used to mix the axion oscillation frequency with the nuclear Larmor frequency. This produces sideband signals that allow frequency scanning through the applied magnetic field.

4. No room for monopole dark matter

Giacomo Ferrante

12/03/2026 12:10

The magnetic monopole of a dark sector has been advocated as an appealing dark matter candidate, since its stability naturally follows from topological arguments. I will revisit the computation of the monopole abundance generated by a thermal phase transition, exploring the three regimes where the phase transition is second order, weakly first order, or supercooled. This will allow us to...