Name: International Symposium on Cosmology and Particle Astrophysics: CosPA 2025
Start: 2025-07-07T08:25:00+09:00
End: 2025-07-11T18:00:00+09:00
Location: IBS Science Culture Center

International Symposium on Cosmology and Particle Astrophysics: CosPA 2025

from Monday, July 7, 2025 (8:25 AM) to Friday, July 11, 2025 (6:00 PM)

Monday, July 7, 2025

4:50 PM Welcome to CosPA 2025 by Prof. Bin Wang
Welcome to CosPA 2025 by Prof. Bin Wang
4:50 PM - 4:55 PM

4:55 PM Welcome to IBS by Prof. Masahide Yamaguchi
Welcome to IBS by Prof. Masahide Yamaguchi
4:55 PM - 5:00 PM
5:00 PM chaired by Masahide Yamaguchi
chaired by Masahide Yamaguchi
5:00 PM - 6:00 PM
Contributions

5:00 PM Flavours of flavoured axion cosmology - Raymond Volkas (U of Melbourne)

5:30 PM Oscillations and parity violation in gravitational wave background from extra tensor modes - Mohammad Ali Gorji (IBS CTPU-CGA)
6:00 PM

6:00 PM - 8:50 PM
Tuesday, July 8, 2025
9:00 AM chaired by Raymond Volkas
chaired by Raymond Volkas
9:00 AM - 10:30 AM
Contributions

9:00 AM PQ quality and scale hierarchy of extra dimensional axions - Kiwoon Choi (IBS CTPU-PTC)

9:30 AM Searching for WIMPs in celestial bodies - Stefano Scopel (Sogang U)

10:00 AM A New Probe to DE & DM Interaction - Bin Wang (SJTU/Yangzhou)
10:30 AM Coffee Break
Coffee Break
10:30 AM - 11:10 AM
11:10 AM chaired by Dong-Won Jung
chaired by Dong-Won Jung
11:10 AM - 12:30 PM
Contributions

11:10 AM Strong First-Order Electroweak Phase Transition in the Type-I two-Higgs doublet model via multi-step transitions - Jeonghyeon Song (Konkuk U)

11:30 AM WIMP and FIMP Dark Matter in Singlet-Triplet Fermionic Model - Abhishek Roy (CQUeST)

11:50 AM Oscillon decay accelerated by coupling external scalar field - Siyao Li (IBS CTPU-CGA)

12:10 PM Second leptogenesis for large baryon-lepton asymmetry discrepancy - Yechan Kim (KAIST)
chaired by Yudai Suwa
chaired by Yudai Suwa
11:10 AM - 12:30 PM
Contributions

11:10 AM Cooling the Shock: New Supernova Constraints on Dark Photons - Seokhoon Yun (IBS CTPU-PTC)

11:30 AM The Neutron Capture Process Low-Mass Dark Matter Experiments - Anthony Villano (U of Colorado, Denver)

11:50 AM Probing Terrestrial Relic Neutrino Charge with Mach-Zehnder Interferometer - Vincent Gene Otero (National Taiwan Normal U)

12:10 PM Some studies on dark matter self-interaction - Chian-Shu Chen (Tamkang U)
12:30 PM Lunch
Lunch
12:30 PM - 2:00 PM
2:00 PM chaired by Xiao-Gang He
chaired by Xiao-Gang He
2:00 PM - 4:00 PM
Contributions

2:00 PM Cogenesis by Majoron - Eung Jin Chun (KIAS)

2:30 PM Universe with a large lepton asymmetry - Masahiro Kawasaki (ICRR/U of Tokyo)

3:00 PM Topological Instanton for curved space particle creation and quantum reflections - Ue-Li Pen (Academia Sinica)

3:30 PM Decoding Stellar Core-Collapse and Compact-Object Formation with Neutrinos - Yudai Suwa (U of Tokyo)
4:00 PM Coffee Break
Coffee Break
4:00 PM - 4:40 PM
4:40 PM chaired by Rinku Maji
chaired by Rinku Maji
4:40 PM - 6:20 PM
Contributions

4:40 PM Microscopic Theory for DM from Topological Gravity - Jianqiao Deng (CUHK)

5:00 PM Evading the Current Direct Detection Bound through Metastable Particle-Assisted Freeze-Out - Sarif Khan (CAU)

5:20 PM Dark gauge-mediated supersymmetry breaking - Jiheon Lee (KAIST)

5:40 PM Void spin distribution as a powerful probe of σ8 - Geonwoo Kang (SNU)

6:00 PM empty
chaired by Seokhoon Yun
chaired by Seokhoon Yun
4:40 PM - 6:20 PM
Contributions

4:40 PM Nailing down the theoretical uncertainties of $\bar{D}$ spectrum produced from dark matter - Adil Jueid (IBS CTPU-PTC)

5:00 PM Dynamical friction for circular orbits in self-interacting ultralight dark matter and Fornax globular clusters - Hyeonmo Koo (U of Seoul)

5:20 PM Can white dwarfs be powered by self-annihilating dark matter? - Cheuk Nam Chu (CUHK)

5:40 PM How a local structure impacts our understanding on fundamental physics - Qianhang Ding (IBS CTPU-CGA)

6:00 PM The holographic TT¯bar deformation of the entanglement entropy in (A)dS/CFT - Jing-Cheng Chang (Lanzhou U)
Wednesday, July 9, 2025
9:00 AM chaired by Kiwoon Choi
chaired by Kiwoon Choi
9:00 AM - 10:30 AM
Contributions

9:00 AM Unexplored gravitational wave backgrounds on intergalactic scales - Misao Sasaki (APCTP/IPMU)

9:30 AM Cosmological Implications of Unification: Topological Structures and Gravitational Waves - Rinku Maji (IBS CTPU-CGA)

10:00 AM Real-time analysis of vacuum decay in curved spacetime - Jun'ichi Yokoyama (IPMU)
10:30 AM Coffee Break
Coffee Break
10:30 AM - 11:10 AM
11:10 AM chaired by Mohammad Ali Gorji
chaired by Mohammad Ali Gorji
11:10 AM - 12:30 PM
Contributions

11:10 AM A Match Made in Heaven: Linking Observables in Inflationary Cosmology - Yuhang Zhu (IBS CTPU-CGA)

11:30 AM Open system EFT for gauge fields and gravity - Perseas Christodoulidis (Ewha Womans U)

11:50 AM Regularized pole inflation and Einstein-Cartan gravity - Minxi He (IBS CTPU-PTC)

12:10 PM Bimodal distributions in the stochastic-δN formalism with the inflaton and the curvaton - Tomotaka Kuroda (IBS CTPU-CGA)
chaired by Shi Pi
chaired by Shi Pi
11:10 AM - 12:30 PM
Contributions

11:10 AM Memory Burden Effects and New Mass Ranges of Primordial Black Hole Dark Matter - Kazunori Kohri (NAOJ)

11:30 AM Primordial Black Hole Reformation in the Early Universe - Philip Lu (KIAS)

11:50 AM Peaks sphericity of non-Gaussian random fields - Michiru Uwabo-Niibo (IBS CTPU-CGA)

12:10 PM Schwinger pair production in global (anti-)de Sitter spacetimes - Chiang-Mei Chen (NCU)
12:30 PM Lunch
Lunch
12:30 PM - 2:00 PM
2:00 PM chaired by Jun'ichi Yokoyama
chaired by Jun'ichi Yokoyama
2:00 PM - 4:00 PM
Contributions

2:00 PM Early Dark Energy Models and Cosmological Tensions - Bum-Hoon Lee

2:30 PM Sommerfeld effect and unitarity - Ryosuke Sato (Osaka U)

3:00 PM (ZOOM) Electroweak phase transition and cosmological magnetic field from a symmetry perspective - Yuta Hamada (KEK)

3:30 PM The SABRE South Experiment at the Stawell Underground Physics Laboratory - Phillip Urquijo (U of Melbourne)
4:00 PM Coffee Break
Coffee Break
4:00 PM - 4:40 PM
4:40 PM chaired by Han Gil Choi
chaired by Han Gil Choi
4:40 PM - 6:00 PM
Contributions

4:40 PM Gravitational-wave Extraction using Independent Component Analysis - Hisaaki Shinkai (Osaka Institute of Technology)

5:00 PM Detection of Gravitational Waves using Electromagnetic Waves beyond Geometrical Optics - Chan Park (Henan Academy of Science)

5:20 PM Binary strange quark star merger in fully general-relativistic simulation - Ho Ching Luk (CUHK)

5:40 PM Novel Polarization Modes of Gravitational Waves - Yu-Qi Dong (Lanzhou U)
chaired by Ying-li Zhang
chaired by Ying-li Zhang
4:40 PM - 6:00 PM
Contributions

4:40 PM Cosmological stimulated emission - Atsuhisa Ota (Chongqing U)

5:00 PM Signatures of Primordial Gravitational Waves on the Large-Scale Structure of the Universe - Pritha Bari (IBS CTPU-CGA)

5:20 PM Primordial Gravitational Waves from Phase Transitions During Reheating - Amitayus Banik (CBNU)

5:40 PM Can Horndeski Genesis be Nonpathological? - Pavel Petrov (IBS CTPU-CGA)
6:30 PM

6:30 PM - 8:30 PM
Room: Convention Hall C, 2F
Thursday, July 10, 2025
9:00 AM chaired by Sang Pyo Kim
chaired by Sang Pyo Kim
9:00 AM - 10:30 AM
Contributions

9:00 AM More fields are different: Stochastic view of multi-field inflationary scenario - Tomo Takahashi (Saga U)

9:30 AM Resolving the neutrino mass and DESI BAO tensions with neutrino chemical potential - Ming-Chung Chu (CUHK)

10:00 AM Metric-Affine Theories of Gravity: From theory to new possible effects - Sebastian Bahamonde (IPMU)
10:30 AM Coffee Break
Coffee Break
10:30 AM - 11:10 AM
11:10 AM chaired by Sebastian Bahamonde
chaired by Sebastian Bahamonde
11:10 AM - 12:30 PM
Contributions

11:10 AM Black holes in nonlinear electrodynamics - Sang Pyo Kim (Kunsan Nat'l U)

11:30 AM New results in bumblebee gravity - Nils Albin Nilsson (IBS CTPU-CGA)

11:50 AM O(D,D) string cosmology from double field theory - Stephen Angus (Sogang U)

12:10 PM Black holes in string-inspired Euler-Heisenberg theory - Theodoros Nakas (IBS CTPU-CGA)
chaired by Arman Shafieloo
chaired by Arman Shafieloo
11:10 AM - 12:30 PM
Contributions

11:10 AM Quantum Gravity Meets DESI: Dynamical Dark Energy in Light of Swampland Trans‐Planckian Censorship Conjecture - Junkai Wang (Tsinghua U)

11:30 AM Tightening dynamical dark energy constraints with galaxy alignments - Junsup Shim (Academia Sinica)

11:50 AM Can blue-tilted primordial power spectrum save the small scale crisis in MW? – From the perspective of Zoom-In simulation for MW host size dark matter halo - Jianhao Wu (CUHK)

12:10 PM Holographic Correlators of Boundary/Crosscap CFTs in Two Dimensions - Song He (Ningbo U)
12:30 PM Lunch
Lunch
12:30 PM - 2:00 PM
2:00 PM chaired by Kazunori Kohri
chaired by Kazunori Kohri
2:00 PM - 4:00 PM
Contributions

2:00 PM Are we entering a new era of modern cosmology? - Rong-Gen Cai (ITP/Ningbo)

2:30 PM Is a stable anisotropic inflation viable? - Tuan Quoc Do (Phenikaa U)

3:00 PM Reconstructing Dark Energy - Arman Shafieloo (KASI)

3:30 PM (ZOOM) Disentangling Modified Gravity and Massive Neutrinos with Intrinsic Shape Alignments of Massive Halos - Jounghun Lee (SNU)
4:00 PM Coffee Break
Coffee Break
4:00 PM - 4:40 PM
4:40 PM chaired by Nils Albin Nilsson
chaired by Nils Albin Nilsson
4:40 PM - 6:20 PM
Contributions

4:40 PM De Sitter cosmological correlators via wormholes - Sunghoon Jung (SNU)

5:00 PM Crunch from AdS bubble collapse in unbounded potentials - Kaloian Lozanov (APCTP)

5:20 PM Bound on Lyapunov exponent in Charged and Rotating AdS Black Hole - Hocheol Lee (Dongguk U)

5:40 PM Entropy created when colliding particles fall into a black hole - De-Chang Dai (Nat'l Dong Hwa U, Taiwan)

6:00 PM Boulware Vacuum vs. Regularity: Vacuum State on the Horizonless Regular Spacetime - Kota Numajiri (YITP, Kyoto U)
chaired by Yuhang Zhu
chaired by Yuhang Zhu
4:40 PM - 6:20 PM
Contributions

4:40 PM Synaptic Field Theory - Jaeok Yi (KAIST)

5:00 PM Constraining the Type 3 interacting dark-energy model using matter pairwise velocity - Kin Ho Luo (CUHK)

5:20 PM How Anisotropic can the Universe be: Constraining Axially Symmetric Bianchi Type I Model with Self-Consistent Recombination History and Observables - Boris Hoi-Lun Ng (CUHK)

5:40 PM Modified Gravity After GW170817: A window via Scalar-Photon Couplings? - Mauricio Valencia-Villegas (Lomonosov Moscow State U)

6:00 PM Magnetar Formation via Accretion Induced Collpase of White Dwarfs - Cheung Siu Hei (CUHK)
Friday, July 11, 2025
9:00 AM chaired by Stefano Scopel
chaired by Stefano Scopel
9:00 AM - 10:30 AM
Contributions

9:00 AM Flavorful Light Dark Matter Window From NA62 K -> π invisible - Xiao-Gang He (TDLI)

9:30 AM Complications in Simple Dark Sectors - David McKeen (TRIUMF)

10:00 AM Phenomenological Consequences of Phase Transitions During Inflation - Haipeng An (Tsinghua U)
10:30 AM Coffee Break
Coffee Break
10:30 AM - 11:10 AM
11:10 AM chaired by Theodoros Nakas
chaired by Theodoros Nakas
11:10 AM - 12:30 PM
Contributions

11:10 AM Non-linearities in black hole perturbation theory - Sam Wong (CUHK)

11:30 AM Quasinormal modes of an accelerating black hole in the near-Nariai limit - Hyewon Han (Dongguk U)

11:50 AM Photon rings of stationary hairy black holes - Xiao-Mei Kuang (Yangzhou U)

12:10 PM A Photon Cloud Induced from an Axion Cloud - Zi-Yu Tang (IBS CTPU-CGA)
chaired by Chan Park
chaired by Chan Park
11:10 AM - 12:30 PM
Contributions

11:10 AM Gravitational wave lensing as a probe of small-scale structures in our universe - Han Gil Choi (IBS CTPU-CGA)

11:30 AM Investigating ultra-high-density equations of state through gravitational waves from binary neutron stars mergers - Luca Baiotti (U of Osaka)

11:50 AM Gravitational waveforms from periodic orbits around a quantum-corrected black hole - Sen Yang (Lanzhou U)

12:10 PM Superradiant Bosons Driving Supermassive Black Hole Mergers - Huiyu Zhu (IBS CTPU-CGA)
12:30 PM Lunch
Lunch
12:30 PM - 2:00 PM
2:00 PM chaired by Masahide Yamaguchi
chaired by Masahide Yamaguchi
2:00 PM - 3:30 PM
Contributions

2:00 PM Confronting IR divergences in de Sitter QFT - Spyros Sypsas (Centro de Ciencias Exactas, UBB)

2:30 PM Inflation beyond slow-roll, non-Gaussianity, and primordial black holes - Shi Pi (ITP)

3:00 PM Formation of primordial black holes from inflationary models - Ying-li Zhang (Tongji U)
3:30 PM by Masahide Yamaguchi
by Masahide Yamaguchi
3:30 PM - 3:40 PM