Conveners
Session 9
- Yongcheng Wu (Nanjing Normal University)
Huaike Guo
(University of Chinese Academy of Sciences)
23/11/2025, 09:00
I will discuss how to measure the gravitational wave spectrum from cosmological first order phase transitions, in particular the Electroweak phase transitions, and how to then predict observables which are important but difficult to measure by other experiments, like the Higgs self-couplings.
Chayan Majumdar
(IMP, CAS)
23/11/2025, 09:25
Heavy neutral leptons (HNLs) are constrained by requirements of Big Bang Nucleosynthesis (BBN) as their decays significantly impact the formation of the primordial elements. We propose here a model where the primary decay channel for the HNLs is to an axion-like particle (ALP) and a neutrino. Consequently, HNLs can decay earlier and evade the BBN bound for lower masses, provided the ALPs...
