Dark Matter 2025: From the Smallest to the Largest Scale

Session

Thursday Afternoon II

Jun 5, 2025, 5:00 PM

Santander, Spain

97. Cosmological concordance from the early universe to the near field

Vera Gluscevic (University of Southern California)

6/5/25, 5:00 PM

Galaxies, Dynamics and Cosmology

Invited Talk

[Connecting via Zoom] Cosmological observables, from the Lyman-alpha forest to the Milky Way substructure, offer unique avenues for probing dark matter and neutrino sectors. Moreover, they often reveal anomalies and tensions that could signal new physics. I will review the status of the recent early-universe and late-universe searches for dark matter and neutrino interactions, highlighting in...

95. Unexplained correlation between Local Matter Density Distribution and the Cosmic Microwave Background Temperature

Marcos Cruz (IFCA (UC-CSIC, Santander))

6/5/25, 5:35 PM

Galaxies, Dynamics and Cosmology

Contributed Talk

Recent observations have revealed a Cosmic Microwave Background (CMB) temperature decrement toward local galaxies within the 2MASS Redshift Survey. We examine this detection by investigating its frequency dependence and sensitivity to component separation methods, indicating that Galactic foregrounds are unlikely responsible. Unlike previous studies, our findings show the decrement is...

94. Impact of heavy axions on gamma-ray bursts

Oindrila Ghosh (OKC, Stockholm)

6/5/25, 5:55 PM

DM Indirect Detection and Astrophysics

Contributed Talk

Short gamma-ray bursts (GRBs) are some of the brightest transients in the universe. Heavy axion-like particles (ALPs) can be produced in the hot plasma of GRB fireballs and escape, transporting energy away the from the source. When they decay outside the source, we show that the resulting photon field is too rarefied to re-thermalize, effectively preventing the re-emergence of the fireball,...

30. Quantum Technology searches for axion dark matter

Sreemanti Chakraborti (IPPP, Durham University)

6/5/25, 6:15 PM

DM Models and Theory

Contributed Talk

Axion-like particles (ALPs) are compelling dark matter candidates, particularly in the "ultralight mass regime." In this talk, I will discuss the theoretical framework for ALP interactions with Standard Model fields, emphasising the renormalization group (RG) running and low-energy matching in quantum field theory. Many quantum sensor experiments are designed to probe very light ALPs, which...