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, 7 July 2025 (08:25) to Friday, 11 July 2025 (18:00)

Monday, 7 July 2025

16:50 Welcome to CosPA 2025 by Prof. Bin Wang
Welcome to CosPA 2025 by Prof. Bin Wang
16:50 - 16:55

16:55 Welcome to IBS by Prof. Masahide Yamaguchi
Welcome to IBS by Prof. Masahide Yamaguchi
16:55 - 17:00
17:00 chaired by Masahide Yamaguchi
chaired by Masahide Yamaguchi
17:00 - 18:00
Contributions

17:00 Flavours of flavoured axion cosmology - Raymond Volkas (U of Melbourne)

17:30 Oscillations and parity violation in gravitational wave background from extra tensor modes - Mohammad Ali Gorji (IBS CTPU-CGA)
18:00

18:00 - 20:50
Tuesday, 8 July 2025
09:00 chaired by Raymond Volkas
chaired by Raymond Volkas
09:00 - 10:30
Contributions

09:00 PQ quality and scale hierarchy of extra dimensional axions - Kiwoon Choi (IBS CTPU-PTC)

09:30 Searching for WIMPs in celestial bodies - Stefano Scopel (Sogang U)

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

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

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

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

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

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

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

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

12:10 Some studies on dark matter self-interaction - Chian-Shu Chen (Tamkang U)
12:30 Lunch
Lunch
12:30 - 14:00
14:00 chaired by Xiao-Gang He
chaired by Xiao-Gang He
14:00 - 16:00
Contributions

14:00 Cogenesis by Majoron - Eung Jin Chun (KIAS)

14:30 Universe with a large lepton asymmetry - Masahiro Kawasaki (ICRR/U of Tokyo)

15:00 Topological Instanton for curved space particle creation and quantum reflections - Ue-Li Pen (Academia Sinica)

15:30 Decoding Stellar Core-Collapse and Compact-Object Formation with Neutrinos - Yudai Suwa (U of Tokyo)
16:00 Coffee Break
Coffee Break
16:00 - 16:40
16:40 chaired by Rinku Maji
chaired by Rinku Maji
16:40 - 18:20
Contributions

16:40 Microscopic Theory for DM from Topological Gravity - Jianqiao Deng (CUHK)

17:00 Evading the Current Direct Detection Bound through Metastable Particle-Assisted Freeze-Out - Sarif Khan (CAU)

17:20 Dark gauge-mediated supersymmetry breaking - Jiheon Lee (KAIST)

17:40 Void spin distribution as a powerful probe of σ8 - Geonwoo Kang (SNU)

18:00 empty
chaired by Seokhoon Yun
chaired by Seokhoon Yun
16:40 - 18:20
Contributions

16:40 Nailing down the theoretical uncertainties of $\bar{D}$ spectrum produced from dark matter - Adil Jueid (IBS CTPU-PTC)

17:00 Dynamical friction for circular orbits in self-interacting ultralight dark matter and Fornax globular clusters - Hyeonmo Koo (U of Seoul)

17:20 Can white dwarfs be powered by self-annihilating dark matter? - Cheuk Nam Chu (CUHK)

17:40 How a local structure impacts our understanding on fundamental physics - Qianhang Ding (IBS CTPU-CGA)

18:00 The holographic TT¯bar deformation of the entanglement entropy in (A)dS/CFT - Jing-Cheng Chang (Lanzhou U)
Wednesday, 9 July 2025
09:00 chaired by Kiwoon Choi
chaired by Kiwoon Choi
09:00 - 10:30
Contributions

09:00 Unexplored gravitational wave backgrounds on intergalactic scales - Misao Sasaki (APCTP/IPMU)

09:30 Cosmological Implications of Unification: Topological Structures and Gravitational Waves - Rinku Maji (IBS CTPU-CGA)

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

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

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

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

12:10 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 - 12:30
Contributions

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

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

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

12:10 Schwinger pair production in global (anti-)de Sitter spacetimes - Chiang-Mei Chen (NCU)
12:30 Lunch
Lunch
12:30 - 14:00
14:00 chaired by Jun'ichi Yokoyama
chaired by Jun'ichi Yokoyama
14:00 - 16:00
Contributions

14:00 Early Dark Energy Models and Cosmological Tensions - Bum-Hoon Lee

14:30 Sommerfeld effect and unitarity - Ryosuke Sato (Osaka U)

15:00 (ZOOM) Electroweak phase transition and cosmological magnetic field from a symmetry perspective - Yuta Hamada (KEK)

15:30 The SABRE South Experiment at the Stawell Underground Physics Laboratory - Phillip Urquijo (U of Melbourne)
16:00 Coffee Break
Coffee Break
16:00 - 16:40
16:40 chaired by Han Gil Choi
chaired by Han Gil Choi
16:40 - 18:00
Contributions

16:40 Gravitational-wave Extraction using Independent Component Analysis - Hisaaki Shinkai (Osaka Institute of Technology)

17:00 Detection of Gravitational Waves using Electromagnetic Waves beyond Geometrical Optics - Chan Park (Henan Academy of Science)

17:20 Binary strange quark star merger in fully general-relativistic simulation - Ho Ching Luk (CUHK)

17:40 Novel Polarization Modes of Gravitational Waves - Yu-Qi Dong (Lanzhou U)
chaired by Ying-li Zhang
chaired by Ying-li Zhang
16:40 - 18:00
Contributions

16:40 Cosmological stimulated emission - Atsuhisa Ota (Chongqing U)

17:00 Signatures of Primordial Gravitational Waves on the Large-Scale Structure of the Universe - Pritha Bari (IBS CTPU-CGA)

17:20 Primordial Gravitational Waves from Phase Transitions During Reheating - Amitayus Banik (CBNU)

17:40 Can Horndeski Genesis be Nonpathological? - Pavel Petrov (IBS CTPU-CGA)
18:30

18:30 - 20:30
Room: Convention Hall C, 2F
Thursday, 10 July 2025
09:00 chaired by Sang Pyo Kim
chaired by Sang Pyo Kim
09:00 - 10:30
Contributions

09:00 More fields are different: Stochastic view of multi-field inflationary scenario - Tomo Takahashi (Saga U)

09:30 Resolving the neutrino mass and DESI BAO tensions with neutrino chemical potential - Ming-Chung Chu (CUHK)

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

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

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

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

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

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

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

11:50 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 Holographic Correlators of Boundary/Crosscap CFTs in Two Dimensions - Song He (Ningbo U)
12:30 Lunch
Lunch
12:30 - 14:00
14:00 chaired by Kazunori Kohri
chaired by Kazunori Kohri
14:00 - 16:00
Contributions

14:00 Are we entering a new era of modern cosmology? - Rong-Gen Cai (ITP/Ningbo)

14:30 Is a stable anisotropic inflation viable? - Tuan Quoc Do (Phenikaa U)

15:00 Reconstructing Dark Energy - Arman Shafieloo (KASI)

15:30 (ZOOM) Disentangling Modified Gravity and Massive Neutrinos with Intrinsic Shape Alignments of Massive Halos - Jounghun Lee (SNU)
16:00 Coffee Break
Coffee Break
16:00 - 16:40
16:40 chaired by Nils Albin Nilsson
chaired by Nils Albin Nilsson
16:40 - 18:20
Contributions

16:40 De Sitter cosmological correlators via wormholes - Sunghoon Jung (SNU)

17:00 Crunch from AdS bubble collapse in unbounded potentials - Kaloian Lozanov (APCTP)

17:20 Bound on Lyapunov exponent in Charged and Rotating AdS Black Hole - Hocheol Lee (Dongguk U)

17:40 Entropy created when colliding particles fall into a black hole - De-Chang Dai (Nat'l Dong Hwa U, Taiwan)

18:00 Boulware Vacuum vs. Regularity: Vacuum State on the Horizonless Regular Spacetime - Kota Numajiri (YITP, Kyoto U)
chaired by Yuhang Zhu
chaired by Yuhang Zhu
16:40 - 18:20
Contributions

16:40 Synaptic Field Theory - Jaeok Yi (KAIST)

17:00 Constraining the Type 3 interacting dark-energy model using matter pairwise velocity - Kin Ho Luo (CUHK)

17:20 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)

17:40 Modified Gravity After GW170817: A window via Scalar-Photon Couplings? - Mauricio Valencia-Villegas (Lomonosov Moscow State U)

18:00 Magnetar Formation via Accretion Induced Collpase of White Dwarfs - Cheung Siu Hei (CUHK)
Friday, 11 July 2025
09:00 chaired by Stefano Scopel
chaired by Stefano Scopel
09:00 - 10:30
Contributions

09:00 Flavorful Light Dark Matter Window From NA62 K -> π invisible - Xiao-Gang He (TDLI)

09:30 Complications in Simple Dark Sectors - David McKeen (TRIUMF)

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

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

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

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

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

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

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

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

12:10 Superradiant Bosons Driving Supermassive Black Hole Mergers - Huiyu Zhu (IBS CTPU-CGA)
12:30 Lunch
Lunch
12:30 - 14:00
14:00 chaired by Masahide Yamaguchi
chaired by Masahide Yamaguchi
14:00 - 15:30
Contributions

14:00 Confronting IR divergences in de Sitter QFT - Spyros Sypsas (Centro de Ciencias Exactas, UBB)

14:30 Inflation beyond slow-roll, non-Gaussianity, and primordial black holes - Shi Pi (ITP)

15:00 Formation of primordial black holes from inflationary models - Ying-li Zhang (Tongji U)
15:30 by Masahide Yamaguchi
by Masahide Yamaguchi
15:30 - 15:40