Higgs Potential 2025: Exploring Symmetry Breaking in Particle Physics and the Early Universe

Session

Special Session of Higgs Cosmology I

21 Dec 2025, 08:15

Conveners

Special Session of Higgs Cosmology I

• Wei Chao (BNU)

69. GW-Collider interface

Michael Ramsey-Musolf (TDLI-SJTU)

21/12/2025, 08:15

70. Bridging the MeV-Gap for Light Higgs Portal Dark Matter

Yue-Lin Sming Tsai (Purple Mountain Observatory)

21/12/2025, 08:45

We explore the surviving parameter space for sub-GeV thermal Dark Matter (DM) within Higgs-portal models, analyzing both a minimal Majorana DM scenario with a singlet scalar mediator and leptophilic DM scenarios. These light DM candidates face severe constraints from the observed relic density, Cosmic Microwave Background (CMB) measurements, and direct detection experiments. Our comprehensive...

25. Cosmological and gravitational-wave phenomenology of phase transitions

Shao-Jiang Wang (Institute of Theoretical Physics, Chinese Academy of Sciences)

21/12/2025, 09:15

I will introduce cosmological and gravitational-wave aspects of phase-transition phenomenology, including bubble nucleation and expansion dynamics, gravitational-wave generations, curvature perturbations, primordial black holes, and, in particular, the induced gravitational waves from primordial gravitational collapse at non-linear and non-perturbative levels.

8. Domain walls beyond Z2

Ye-Ling Zhou (HIAS-UCAS)

21/12/2025, 09:45

Domain walls (DWs) are topological defects arising from spontaneous breaking of discrete symmetries. The DW property is determined by both the symmetry and potential of the new Higgs which triggers the symmetry breaking. While most phenomenological studies on GWs from DWs focus on those from Z2 breaking, I will extend to those beyond Z2. The latter are widely predicted in, e.g., flavour...