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2024 CAU-PNU Beyond the Standard Model Workshop

19–23 Feb 2024
Chung-Ang University
Asia/Seoul timezone

Contact: Prof. Hyun Min Lee

Contribution List

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  1. 1. Bubbles and Walls in Axion Cosmology
    Prof. Fuminobu Takahashi (Tohoku University)
    19/02/2024, 09:30
  2. 3. Search for Axions and ALPs
    Dr SungWoo Youn (Institute for Basic Science)
    19/02/2024, 11:00
  3. 5. Cosmological dark photons and their implications
    Dr Seokhoon Yun (University of Padova)
    19/02/2024, 11:30
  4. 4. Common origin of dark matter, baryon asymmetry and neutrino masses in the standard model with extended scalars
    Sin Kyu Kang (Seoul-Tech)
    19/02/2024, 14:00
  5. 15. Dark matter searches at LHC
    Chang-Seong Moon (Kyungpook National University (KR))
    19/02/2024, 14:30
  6. 16. Probing dark Z decays at the HL-LHC using Transformer Encoder
    Prof. Myeonghun Park (Seoultech)
    19/02/2024, 15:00
  7. 7. Dark sector particle searches with NaI(Tl) crystals
    Prof. Hyunsu Lee (IBS CUP)
    19/02/2024, 16:00
  8. 8. Probing sterile neutirno-tau neutrino mixing at SHiP experiment
    Ki-Young Choi (Sungkyunkwan University (KR))
    19/02/2024, 16:40
  9. 9. Probing the Migdal effect in the precise angular distribution
    Prof. Bin Zhu (Yantai University)
    19/02/2024, 17:10
  10. 10. QFT methods for Gravitational Waves Physics
    Chia-Hsien Shen (National Taiwan University)
    20/02/2024, 09:30
  11. 38. Scalar Field in Black Holes and Interactions
    Bogeun Gwak (Dongguk University)
    20/02/2024, 10:50

    We introduce the scattering of a scalar field in the black hole spacetime. Based on our recent studies, various sides of a black hole are presented. When a scalar field is scattered by a black hole, there are fluxes going into the black hole. From the fluxes of the scalar field flowing into the black hole, the changes in mass and angular momenta of the black hole are obtained. These can affect...

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  12. 11. Ringdown gravitational waves from close scattering of two black holes
    Dr Young-Hwan Hyun (KASI)
    20/02/2024, 11:20
  13. 6. Detection of high frequency gravitational waves in EM cavities
    Dr Sang Hui Im (IBS CTPU)
    20/02/2024, 11:50
  14. 2. Probing the PQ quality with Electric Dipole Moments
    Prof. Kiwoon Choi (IBS CTPU)
    20/02/2024, 14:00
  15. 14. A Cosmic Window on the Dark Axion Portal
    Minho SON
    20/02/2024, 14:40
  16. 13. Axion Dark Matters from Cosmic String Network
    Heejoo Kim (KAIST)
    20/02/2024, 15:10

    Global cosmic string simulation is revisited on the lattice of the size of 4096^3. The simulation result supports the recently observed logarithmic growth in both the string number density and the power-law spectral index for the instantaneous axion emission spectra from string. It is found that these results stay robust against various simulation setups differing by the initial conditions and...

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  17. 17. The Weak Scale Circa 2024: Crisis of Naturalness, or of Aesthetics? (zoom)
    Matthew Philip Mccullough (CERN)
    20/02/2024, 16:00

    Zoom talk
    Time: Feb 20, 2024 04:00 PM Seoul

    https://cau.zoom.us/j/83446216531?pwd=L3FFMTBmN1hlNUdXSFA0WGlWeWM1dz09

    Meeting ID: 834 4621 6531
    Passcode: CAUBSM

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  18. 18. The latest results from the LHC
    Tae Jeong Kim (Hanyang University (KR))
    20/02/2024, 16:40
  19. 19. Geometric view for the pNGB potential
    Dongwoo Kang
    20/02/2024, 17:10

    We investigate the pseudo-Nambu-Goldstone bosons (pNGBs) potential in the geometrical point of view. In this talk, first I will review about spontaneous symmetry breaking and NGB and how to construct the effective Lagrangian. Then I will discuss about pNGB with explicit symmetry breaking and how to essentially organise or structurally understand the pNGB potential without recourse to the UV symmetries.

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  20. 20. Current status of dark matter and cosmology
    Nicolás Bernal (New York University Abu Dhabi)
    21/02/2024, 09:30
  21. 21. The baryon asymmetry from a scale hierarchy
    Chang Sub Shin (Institute for Basic Science)
    21/02/2024, 11:00
  22. 22. BBN constraint on majoron
    Dr Tae Hyun Jung (Institute for Basic Science)
    21/02/2024, 11:30

    In this talk, I will introduce the Big Bang nucleosynthesis (BBN) constraint on the majoron-like particle in the mass range between 1MeV to 10GeV which dominantly decays into the standard model neutrinos. For a lifetime shorter than 1 sec, the majoron heats up the background plasma by injecting neutrinos and changes the relation of photon temperature and background neutrino temperature,...

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  23. 23. Halo-independent bounds of WIMP-nucleon couplings from direct detection and neutrino observations in elastic and inelastic scatterings
    Sunghyun Kang (Sogang University)
    21/02/2024, 12:00

    I will discuss the halo-independent bounds on the WIMP-nucleon couplings of the non-relativistic effective Hamiltonian that drives the scattering process off nuclei of a WIMP of spin 1/2 combining direct detection experiments and neutrino telescopes data in order to cover the full WIMP incoming speed range.
    In the elastic interactions, for most of the couplings the degree of relaxation of...

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  24. 24. Lattice Cosmology
    Daniel G. Figueroa (Univ. of Valencia and CSIC (ES))
    21/02/2024, 14:00

    We will introduce 'Lattice Cosmology' techniques and explain how these can be used to solve non-linear dynamics of interactive fields in an expanding Universe. As a demonstration of these ideas we apply them to solve three different problems of early Universe cosmology: i) the non-linear dynamics of axion inflation, iii) the dynamics and gravitational wave emission of string loops, and if time...

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  25. 25. High-Frequency Gravitational Waves in Axion Haloscopes
    Sung Mook Lee (Yonsei University (KR))
    21/02/2024, 15:00
  26. 26. The fall and the rise of Weyl gauge theory (zoom)
    Dumitru Ghilencea (Horia Hulubei National Institute of Physics and Nuclear Engineering (RO))
    21/02/2024, 16:00

    Zoom talk
    Time: Feb 21, 2024 04:00 PM Seoul

    https://cau.zoom.us/j/82398189490?pwd=VkpWSEpqVGh5Vnc1ODRhZmdtdGRUdz09

    Meeting ID: 823 9818 9490
    Passcode: CAUBSM

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  27. 12. Imprint of inflationary gravitational waves and WIMP dark matter in pulsar timing array data
    Suruj Jyoti Das (Indian Institute of Technology Guwahati)
    21/02/2024, 16:40

    Motivated by the recent release of new results from five different pulsar timing array (PTA) experiments claiming to have found compelling evidence for primordial gravitational waves (GW) at nano-Hz frequencies, we consider the prospects of generating such a signal from inflationary blue-tilted tensor power spectrum in a specific dark matter (DM) scenario dubbed as Miracle-less WIMP. While...

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  28. 28. Higgs pole inflation
    Mrs Adriana Guerrero Menkara
    21/02/2024, 17:00
  29. 29. Primordial black holes from inflation
    Guillermo Ballesteros (IFT UAM-CSIC)
    22/02/2024, 09:30
  30. 30. Euclidean wormholes and the origin of alpha-vacua
    Prof. Dong-han Yeom (Asia Pacific Center for Theoretical Physics)
    22/02/2024, 11:00

    We investigate Euclidean wormholes and their cosmological implications. Generically it was known that the Euclidean compact instantons explain the Bunch-Davies vacuum. If we make the assumption weeker and consider the Euclidean wormholes, we have the freedom to choose another vacuum condition. If we impose the de Sitter invariance condition, we can conclude that the Euclidean wormholes can be...

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  31. 31. Gauged Quintessence
    Jaeok Yi (KAIST)
    22/02/2024, 11:30

    We introduce the gauged quintessence model, in which the dark energy field (quintessence) has a gauge symmetry. This is a kind of realization of the interacting quintessence model and the first quintessence model under a gauge symmetry. We identify the radial part of the complex scalar as the dark energy field (quintessence), while the angular part is the longitudinal component of a new gauge...

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  32. 32. Non gravitational signals of dark energy under a gauge symmetry
    Jiheon Lee (KAIST)
    22/02/2024, 11:50

    We investigate non-gravitational signals of dark energy within the framework of gauge symmetry in the dark energy sector. Traditionally, dark energy has been primarily studied through gravitational effects within general relativity or its extensions. On the other hand, the gauge principles have played a central role in the standard model sector and dark matter sector. If the dark energy field...

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  33. 33. New physics search via angular distribution of B→D∗ℓν decay in the light of the new lattice data
    Emi Kou (LAL-IN2P3)
    22/02/2024, 14:00

    A recent theory work on new physics search in the B->D*l nu decay (including Vcb puzzle etc) will be discussed.

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  34. 34. Recent highlights from the Belle II experiment
    Youngjoon Kwon
    22/02/2024, 14:30
  35. 35. Exciting prospects for dark matter at neutrino and direct detection
    Prof. Jong-Chul Park (Chungnam National University (KR))
    22/02/2024, 15:00
  36. 36. Recent B+ → Kνν Excess, Muon (g − 2) and thermal WIMP DM in U(1)𝑳𝝁−𝑳𝝉 Model
    Dr Jongkuk Kim (Korea Institute for Advanced Study)
    22/02/2024, 15:30

    The Belle II collaboration recently announced that they observed the B+ → K+νν decay process for the first time. This dineutrino mode of B+ → K+νν has been theoretically identified as a very clean channel. However, their result encounters a 2.8σ deviation from the Standard Model (SM) calculation. On the other hand, last year, Fermilab released new data on muon (g − 2) away from the SM...

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  37. 37. New Dynamical Degrees of Freedom from Invertible Transformations
    Masahide Yamaguchi (Tokyo Institute of Technology)
    23/02/2024, 09:30
  38. 27. Inflationary Correlators with Dynamical Mass
    Shuntaro AOKI
    23/02/2024, 10:10

    Massive fields can imprint unique oscillatory features on primordial correlation functions or inflationary correlators, which is dubbed the cosmological collider signal. In this work, we analytically investigate the effects of a time-dependent mass of a scalar field on inflationary correlators, extending previous numerical studies and implementing techniques developed in the cosmological...

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  39. 39. Lessons from the bygone anomalies : Personal viewpoints
    Prof. Pyungwon Ko (KIAS (Korea Institute for Advanced Study))
    23/02/2024, 11:00
  40. 40. Hunting for Hypercharge Anapole Dark Matter
    Jaehoon Jeong (KIAS)
    23/02/2024, 11:40

    We conduct a combined analysis to investigate dark matter (DM) with hypercharge anapole
    moments, focusing on scenarios where Majorana DM particles with spin 1/2 or 1 interact
    exclusively with Standard Model particles through U(1)Y hypercharge anapole terms. For
    completeness, we construct general, effective, and hypercharge gauge-invariant three-point
    vertices. These enable the generation...

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  41. 41. Uncovering Secret Neutrino Interactions at Tau Neutrino Experiments
    Prof. Seodong Shin (Jeonbuk National University)
    23/02/2024, 14:00
  42. 42. Bounds to dark photon model from invisible and semi-invisible meson decays
    Alexey Zhevlakov (Joint Institute for Nuclear Research (RU))
    23/02/2024, 14:30

    Invisible and semi-invisible decays of mesons are good tools for testing dark matter models. In particular, we consider the possibility to study dark photon model parameter space in experiments at fixed target (for NA64 and other). We discuss limits from fixed target experiments using leptonic or hadronic beams.

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  43. 43. Searching for Heavy Leptophilic $Z'$ at the Future Lepton Colliders
    Ms ROJALIN PADHAN (Institute of Physics, Bhubaneswar)
    23/02/2024, 14:50

    We study the phenomenology of leptophilic $Z'$ gauge bosons at the future high-energy $e^+e^-$ or $\mu^+\mu^-$ colliders. The leptophilic $Z'$ model remains largely unconstrained from current low-energy and collider searches for $Z'$ masses above ${\cal O}(100~{\rm GeV})$, thus providing a unique opportunity for future lepton colliders. Taking leptophilic...

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  44. 45. Light thermal dark matter via type-I seesaw portal
    Satyabrata Mahapatra (Sungkyungkwan University)
    23/02/2024, 15:40

    We propose a minimal scenario for light thermal dark matter (DM) in sub-GeV to GeV ballpark by incorporating a scalar singlet DM in a type-I seesaw scenario extended by an additional Higgs doublet ϕ2. The latter permits efficient annihilation of light scalar DM into leptonic final states including right-handed neutrinos (RHN). While DM annihilation into charged lepton final states is kept...

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  45. 46. WIMPs in Dilatonic Einstein Gauss-Bonnet Cosmology
    Arpan Kar (Center for Quantum Spacetime (CQUeST), Sogang University)
    23/02/2024, 16:00

    In this talk I will discuss how the Weakly Interacting Massive Particle (WIMP) thermal decoupling scenario can be used to probe Cosmologies in dilatonic Einstein Gauss-Bonnet (dEGB) gravity, where the Gauss–Bonnet term is non–minimally coupled to a scalar field with vanishing potential. Constraints on the model parameters can be obtained when the ensuing modified cosmological scenario drives...

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  46. 44. Forbidden Conformal Dark Matter
    Seung J. Lee (Korea University)

    In recent years, there has been growing interest and progress in high-frequency gravitational waves (HFGWs) within both theoretical and experimental realms. Particularly noteworthy is the emergence of oscillating magnetic fields induced by both axions and GWs in the presence of electromagnetic fields—an intriguing intersection that holds the potential for a detectable fingerprint. This...

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