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Focus Workshop on Cosmological Phase Transitions: Theory, Dark Matter Genesis, and Gravitational Wave Signatures

20–23 Nov 2025
IBS, Daejeon
Asia/Seoul timezone

Contribution List

24 out of 24 displayed
  1. 23. Consistent Thermal Resummation and Phase Transitions with 2PI Methods
    Amitayus Banik (Chungbuk National University)
    20/11/2025, 10:30

    The scalar potential at finite temperature is often used to track the thermal evolution of the universe and in the study of cosmological phase transitions (PTs). As observables, such as the spectrum of gravitational waves (GWs), can ultimately be derived from this quantity, it must be computed accurately. We first review the calculation of the finite-temperature effective potential,...

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  2. 24. Discussion
    20/11/2025, 11:30
  3. 1. Probing CP violation for electroweak baryogenesis in 2HDM
    Yushi Mura
    20/11/2025, 14:00

    In this talk, we discuss CP violation and electroweak baryogenesis in 2HDM.
    We consider a scenario where the top quarks generate the baryon asymmetry, but the light-fermion couplings are suppressed to avoid strong constraints from EDM measurements.
    In our scenario, it is found that the leading contributions arise in the top-quark EDMs at the two-loop level, which induce the electron,...

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  4. 2. Discussion
    20/11/2025, 15:00
  5. 3. An Invitation to the Hamiltonian Formulation of Lattice Gauge Theories
    Kohei Fujikura
    20/11/2025, 16:00

    Nonperturbative first-principles calculations are central to studies of cosmological phase transitions, including the hot electroweak and QCD phase diagrams. Euclidean path-integral Monte Carlo has yielded reliable results for thermal transitions. However, real-time dynamics, the QCD phase diagram at finite baryon density, and θ terms suffer from the sign problem. The Hamiltonian formulation...

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  6. 4. Discussion
    20/11/2025, 17:00
  7. 5. Extended Higgs sectors and EW baryogenesis
    Shinya Kanemura (University of Toyama)
    21/11/2025, 10:30

    We discuss various phenomenological aspects of physics in the model for EW baryogenesis based on the extended Higgs sectors. Important discriminative predictions of the scenario of EW baryogenesis are the phenomena from extra CP violation and the first order EW phase transition. We discuss some phenomenological features of models of EW baryogenesis and how to test such models by future...

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  8. 6. Discussion
    21/11/2025, 11:30
  9. 7. MeV First-Order Dark Phase Transitions
    Shaoping Li
    21/11/2025, 14:00

    MeV-scale first-order phase transitions (FOPT) can generate stochastic gravitational waves (GW) in
    the nanohertz frequency, which can now be probed by Pulsar Timing Array experiments and will be targeted by
    Square Kilometer Array. Nanohertz GW can also give rise to spectral distortions in the cosmic microwave
    background and modification of the effective number of neutrino species,...

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  10. 8. Discussion
    21/11/2025, 15:00
  11. 9. TBA
    Venus Keus (Dublin Institute for Advanced Studies (DIAS))
    21/11/2025, 16:00
  12. 10. Discussion
    21/11/2025, 17:00
  13. 11. Thermal nucleation: bridging simulations and analytics
    Joonas Hirvonen (University of Nottingham)
    22/11/2025, 10:00

    TBA

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  14. 12. Discussion
    22/11/2025, 11:00
  15. 13. Primordial Black Hole catalyzes the First-Order Electroweak Phase Transition and its Parameter Space
    Jiang Zhu (Shanghai jiao tong univercity)
    22/11/2025, 11:30

    We discuss the catalysis of the primordial black holes(PBH) on the first-order electroweak phase transition(FOEWPT). We accurately studied the nucleation rate for bubbles around the PBH by solving the Einstein and bounce equations rather than applying the thin-wall approximation. We found the ordinary thin-wall approximation will overestimate the nucleation rate. For the first time, we showed...

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  16. 14. Discussion
    22/11/2025, 12:30
  17. 15. Statistical Analysis of FOPT over an Extended Bandwidth as a Probe of New Physics
    Liliana Velasco Sevilla (Sogang University)
    22/11/2025, 14:30

    Collider-based searches for new physics are inherently limited in both energy reach and experimental precision. In contrast, first-order phase transitions (FOPTs) in the early universe can probe much higher fundamental scales, making it valuable to place observational constraints on a broad class of models. We propose a combined statistical analysis across multiple frequency bands that can set...

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  18. 16. Discussion
    22/11/2025, 15:30
  19. 17. Nonthermal heavy dark matter from a first-order phase transition
    Hyun Min Lee (Chung-Ang University)
    22/11/2025, 16:30

    We study nonthermal production of heavy dark matter from the dynamics of the background scalar field during a first-order phase transition, predominantly from bubble collisions. In scenarios where bubble walls achieve runaway behavior and get boosted to very high energies, we find that it is possible to produce dark matter with mass several orders of magnitude above the symmetry breaking scale...

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  20. 18. Discussion
    22/11/2025, 17:30
  21. 19. TBA
    Ryusuke Jinno
    23/11/2025, 10:00
  22. 20. Discussion
    23/11/2025, 11:00
  23. 21. Gravitational Wave Signals from Dark Higgs Inflation and Grand Unification
    Joern Kersten (Yonsei University)
    23/11/2025, 11:30

    I will discuss the production of gravitational waves from a first-order phase transition in a "Dark Higgs Inflation" model (providing a unified framework for inflation and observable gravitational waves from a phase transition) and in an SO(10) Grand Unified Theory.

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  24. 22. Discussion
    23/11/2025, 12:30