New directions EXploring the Unknown beyond the Standard Model (NEXUS 2026)

Session

Parallel talks (1C)

10 Sept 2026, 16:20

Tsung-Dao Lee Institute/S5F-S500 - Lecture Room (Tsung-Dao Lee Institute)

3. Environmental Paths of Dwarf Galaxies in Self-Interacting Dark Matter with Mass Segregation

Daneng Yang (Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, China)

10/09/2026, 16:20

Oral Presentation

Dwarf galaxies evolve in diverse environments and serve as important probes of dark matter physics and galaxy formation. In this talk, I will present the environmental evolution of dwarf galaxies within a two-component self-interacting dark matter (SIDM) model featuring mass segregation. In this model, energy exchange between heavy and light dark matter particles causes the heavier component...

2. Enhanced Cosmic-Ray Cooling in AGN from Dark Matter Deep Inelastic Scattering

Dr Chih-Ting Lu (Nanjing Normal University)

10/09/2026, 16:40

Oral Presentation

The diffusion of high-energy cosmic rays (CRs) through the dark matter (DM) spikes of active galactic nuclei entails significant energy loss via interactions with DM. While previous studies of sub-GeV DM have focused on elastic scattering, this process becomes insufficient at higher proton energies and DM masses. In this work, we investigate the CR-DM deep inelastic scattering (DIS) as...

28. Galactic Center gamma-ray excess from a generic triaxial halo

Leo Qiyuan Hu (City University of Hong Kong)

10/09/2026, 17:00

Oral Presentation

Recent studies of Galactic surveys, such as Gaia, have revealed that the Milky Way's gravitational potential comes from a matter distribution that is triaxial and rotated with respect to the Galactic center-Sun axis. This, in turn, could mean that the dark matter halo also shares these properties. In this talk, I will discuss e.g. the compatibility of the morphology of the Galactic Center...

57. Mechanisms of Kinetic Equilibrium between SIMP and radiation

Yassine El Mohtadi (ICTP-AP, UCAS)

10/09/2026, 17:20

Oral Presentation

We propose a novel mechanism for achieving the required kinetic equilibrium between dark matter and a radiation bath during the freeze-out of self-annihilating dark matter. This mechanism arises naturally in a class of strongly coupled models containing nearly massless axions. Focusing on a strongly interacting massive particle (SIMP) scenario augmented by a dark axion, we demonstrate that the...

88. Baryogenesis from the Decay of Primordial U(1)_{L_\mu-L_\tau} Magnetic Helicity

di wu (HIAS)

10/09/2026, 17:40

We study baryogenesis from a helical U(1){L\mu-L_\tau} gauge field generated during axion inflation. If Schwinger production is suppressed during inflation, a sizable magnetic helicity can survive reheating while the initial fermion asymmetry remains negligible. In the radiation-dominated era, finite conductivity gradually dissipates the helicity. Through the chiral anomaly, this produces...