KEK Theory Meeting on Particle Physics Phenomenology (KEK-PH2025winter)

Session

plenary

Feb 18, 2025, 10:10 AM

seminar hall (Building 3)

Conveners

plenary: Christophe Grojean

• Ryuichiro Kitano

plenary: Ian Low

• Ryuichiro Kitano

plenary: Shigeki Hirose, Koji Hashimoto

• Ian Low

plenary: Zoltan Ligeti, Abner Soffer

• Motoi Endo

plenary: Sokratis Trifinopoulos, Shingo Kazama

• Motoi Endo

plenary: Takeo Moroi, Motoko Fujiwara

• Kyohei Mukaida

plenary: Wen Yin, Akito Kusaka

• Kyohei Mukaida

plenary: Jacob Moritz

• Yuta Hamada

plenary: Kyohei Mukaida, Jorinde van de Vis

• Yuta Hamada

4. CERN Future Circular Collider: an electroweak and flavour factory

Christophe Grojean

2/18/25, 10:10 AM

5. Quantum Entanglement and Emerging Symmetry

Ian Low

2/18/25, 11:10 AM

6. Recent results from ATLAS and prospects for HL-LHC

Shigeki Hirose

2/18/25, 1:30 PM

7. Recent results in MLPhys --- "Machine Learning Physics" initiative in Japan

Koji Hashimoto

2/18/25, 2:10 PM

8. Majorana phases beyond neutrinoless double beta decay

Zoltan Ligeti

2/19/25, 9:00 AM

9. Recent updates and future prospects of the Belle II experiment

Abner Soffer

2/19/25, 9:40 AM

I will report recent results and prospects for future results from the Belle II experiment

10. Flavor Patterns of Fundamental Particles from Quantum Entanglement?

Sokratis Trifinopoulos

2/19/25, 10:30 AM

The Cabibbo-Kobayashi-Maskawa (CKM) matrix, which controls flavor mixing between the three generations of quark fermions, is a key input to the Standard Model of particle physics. In this paper, we identify a surprising connection between quantum entanglement and the degree of quark mixing. Focusing on a specific limit of 2→2 quark scattering mediated by electroweak bosons, we find that the...

11. Direct Dark Matter Detection with Liquid Xenon Detectors

Shingo Kazama

2/19/25, 11:10 AM

12. Dark Matter Detection using Quantum Bits

Takeo Moroi

2/20/25, 9:00 AM

I will discuss a possibility to use quantum bits (qubits) for wave-like-dark-matter detection. I will explain the basic idea and show the expected sensitivity. I will also discuss an idea to enhance the sensitivity using quantum nature of the qubits.

13. Soft Collinear Effective Theory for heavy dark matter annihilation

Motoko Fujiwara

2/20/25, 9:40 AM

Electroweakly interacting stable particles in the (1 − 10) TeV mass range can be a dark matter candidate with rich testability.
In particular, gamma-ray line-like features are expected to be a smoking-gun signature for indirect detection.
In this framework, one fundamental question follows; how to distinguish DM spin among DM candidates with the same electroweak interaction by contrasting...

14. Undulators as axion factories

Wen Yin

2/20/25, 10:30 AM

I will present a low-cost experimental proposal for axion searches at synchrotron radiation facilities, such as SPring-8, NanoTerasu, and Photon Factory. Specifically, I will discuss the method for calculating axion production in an undulator, a type of light source widely used across various fields. By positioning an axion detector outside the shield used in the primary experiments, we can...

15. Cosmic Microwave Background

Akito Kusaka

2/20/25, 11:10 AM

16. Candidate de Sitter Vacua

Jacob Moritz

2/21/25, 9:00 AM

17. Cascade of Energetic SM Particles

Kyohei Mukaida

2/21/25, 11:00 AM

18. The bubble wall velocity in cosmological phase transitions

Jorinde van de Vis

2/21/25, 11:40 AM

Cosmological first order phase transitions are a promising source of gravitational waves, and a possible explanation of the baryon asymmetry and dark matter abundance.
Predicting the phenomenological consequences of such phase transitions requires knowledge of the expansion velocity of the bubbles formed in a phase transition.
In this talk, I will present WallGo, a software package for the...