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Session I:Dark Metter I (12:30-14:10)
Chair:--- (---) |
| 12:30 | Venue Information (12:30-12:40)
abstract/pdf | Kazama, Shingo (Institute of Scinence Tokyo)
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Opening (12:40-12:50)
abstract/pdf | Kishimoto, Yasuhiro (RCNS, Tohoku Univ.)
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The WIMP Paradigm and Beyond: Status and Future Directions (12:50-13:30)
Abstract:
The WIMP paradigm, in which dark matter particles are assumed to interact with the Standard Model and to have been thermalized in the early universe, remains one of the most compelling scenarios. It provides robust and testable predictions across a variety of interaction channels. Driven by significant experimental advances in both direct and indirect detection, increasingly precise theoretical calculations now enable the identification of dark matter signatures in observational data. In this talk, we review the current status and future prospects of the standard WIMP paradigm and discuss recent efforts to explore physics beyond it.
| Motoko Fujiwara (Kyushu University) |
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| 13:00 |
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| 13:30 | Axion (13:30-14:10)
abstract/pdf | Saikawa, Ken-ichi (Kanazawa University)
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| 14:00 |
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| Coffee Break(14:10-14:40) |
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| 14:30 |
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Session II:Dark Metter II (14:40-15:25)
Chair:--- (---) |
| 14:40 | Axion Summary+ADMX (14:40-15:25)
abstract/pdf | Gray Rybka (University of Washington)
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| 15:00 |
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TBA (15:25-15:50)
Abstract:
Uploaded later
| Atsushi Tokiyasu (Tohoku University) |
| 15:30 |
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Poster session (15:50-16:50)
Chair:--- (---) |
| 15:50 | Poster session(15:50-16:50) |
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| 16:00 |
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| 16:30 |
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Session III:LowBG Technologies (16:50-18:05)
Chair:--- (---) |
| 16:50 | Activities of D01 group (16:50-17:15)
Abstract:
This presentation provides an overview of the research activities conducted under Research Project D01, with particular emphasis on the current status of collaborations with other research projects and their potential future development. The research achievements obtained since FY2024 are then presented. Finally, future directions and prospects for the project are discussed.
| Yuuki Nakano (University of Toyama) |
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| 17:00 |
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Radon removal using silver-ion exchanged zeolite (17:15-17:40)
Abstract:
One of the common major backgrounds in underground experiments is the radioactive noble gas radon-222 (hereafter, radon).
It has been reported up to around 2023 that certain types of silver ion–exchanged zeolites (hereafter, silver zeolites) exhibit excellent adsorption performance for xenon and radon in air at room temperature. Motivated by this, in this Transformative Research Areas we have initiated a study in collaboration with zeolite specialists to develop original silver zeolites with superior radon adsorption capability in air, and to apply the developed materials to underground experiments both within and outside the research area.
In this talk, I will report on the current progress of this research.
| Yasuo Takeuchi (Kobe University) |
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| 17:30 |
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KERNEL (17:40-18:05)
abstract/pdf | --- (--)
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| 18:00 |
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Session IV:Double Beta Decay I (09:00-10:20)
Chair:--- (---) |
| 09:00 | Neutrinoless Double Beta Decay: A Theoretical Overview (09:00-09:40)
Abstract:
I will review the theoretical aspects of neutrinoless double beta decay, touching on recent developments in the field.
| Kaori Fuyuto (KEK) |
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| 09:30 |
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Neutrinoless double-beta decay nuclear matrix elements from the shell-model perpective (09:40-10:20)
Abstract:
We briefly review recent progress in the evaluation
of nuclear matrix elements (NMEs) of neutrinoless double-beta decay.
The estimation by the shell-model calculations is limited to light nuclei,
but the quasiparticle vacua shell model (QVSM) enables us to estimate the NMEs
of 96Zr and 150Nd, which are also reported here.
| Noritaka Shimizu (University of Tsukuba) |
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| 10:00 |
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| Coffee Break(10:20-10:50) |
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| 10:30 |
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Session V:Double Beta Decay II (10:50-12:10)
Chair:--- (---) |
| 10:50 | Latest LEGEND results and future prospects (10:50-11:30)
Abstract:
I'll report recent limits on neutrinoless double-beta decay in Ge-76 from LEGEND-200, which deploys an array of Ge crystal diodes into a liquid argon scintillation detector, reaching record half-life sensitivity for this process when combined with previous-generation HPGe searches. LEGEND-200 continues to run at the Gran Sasso laboratory in Italy and is poised to break new ground in the coming years. I'll also give an update on progress toward the future phase of the experiment, LEGEND-1000, which will deploy 1 ton of Ge detectors in underground-sourced liquid argon. For most phenomenological nuclear matrix element calculations, LEGEND-1000 will have discovery sensitivity covering the entire parameter space for light neutrino exchange with inverted-ordered masses.
| Jason Detwiler (University of Washington) |
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| 11:00 |
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| 11:30 | To be decided (CUPID experiment) (11:30-12:10)
Abstract:
To be decided
| Thomas O'Donnell (Virginia Tech) |
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| 12:00 |
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| Coffee Break(12:10-13:40) |
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| 12:30 |
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| 13:00 |
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| 13:30 |
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Session VI:Double Beta Decay III/Dark Matter III (13:40-14:55)
Chair:--- (---) |
| 13:40 | KamLAND-Zen (13:40-14:05)
Abstract:
In this presentation, we will discuss the current status and future prospects of the KamLAND-Zen experiment.
| Koji Ishidoshiro (Tohoku University) |
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| 14:00 |
Laser isotope separation of 48Ca for the CANDLES experiment (14:05-14:30)
Abstract:
The CANDLES experiment searches for neutrinoless double-beta decay (0νββ) using 48Ca. Because of its large Q-value (4.3 MeV), 48Ca is a promising isotope for next-generation experiments. However, its natural abundance is only 0.187%, making isotope enrichment essential.
We are developing a laser isotope separation (LIS) system based on the atomic beam deflection method at RCNP, Osaka University. A diode laser resonant with the 4s2 1S0 → 4s4p 1P1 transition (422.79 nm) selectively deflects 48Ca atoms, and the isotope composition is measured by TOF after Nd:YAG laser ionization.
By optimizing the laser and atomic beam, we achieved 20% 48Ca enrichment, about 100 times the natural abundance. We report the performance of the LIS system and the current status of enriched 48Ca target fabrication.
| KENJI MISHIMA (RCNP, the university of Osaka) |
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| 14:30 | XENONnT (14:30-14:55)
abstract/pdf | Tianyu Zhu (IPMU)
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Poster session (14:55-15:55)
Chair:--- (---) |
| 14:55 | Poster session(14:55-15:55) |
| 15:00 |
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| 15:30 |
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Session VII:Dark Matter IV (15:55-17:30)
Chair:--- (---) |
| 15:55 | Towards new physics: from LZ to XLZD (15:55-16:40)
Abstract:
Liquid xenon detectors have transformed the search for rare particle interactions and nuclear decays. Owing to the combination of ultra-low backgrounds with low energy thresholds in a scalable technology, they have led the global search for electroweak dark matter for more than a decade. I will review recent results from the LUX-ZEPLIN (LZ) experiment, which has been operating at SURF since 2021, including searches for dark matter, neutrino interactions, and neutrinoless double-beta decay. Then I will introduce XLZD, the next-generation rare event observatory containing up to 100 tonnes of liquid xenon. XLZD aims to perform the definitive search for dark matter scattering above the “neutrino floor” and provide world-leading sensitivity to neutrinoless double-beta decay in Xe-136.
| Henrique Araujo (Imperial College London & STFC Rutherford Appleton Laboratory) |
| 16:00 |
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| 16:30 |
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Direction-sensitive dark matter search using low pressure gaseous detectors (16:40-17:05)
Abstract:
The sensitivity of the direct dark matter search is being improved by various energy-sensitive experiments such as dual-phase liquid xenon detectors. In parallel, direction-sensitive dark matter searches are designed and taken place to reveal properties of the dark matter particle after its discovery or to explore beyond the neutrino fog.
B03 group is engaged in directional dark matter searches using high precision tracking detectors. This talk will focus on activities using low pressure gaseous detectors. We present the latest status of the underground dark matter search experiment and related activities.
| Satoshi Higashino (Kobe University) |
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| 17:00 |
NEWSdm (17:05-17:30)
abstract/pdf | Chin, Natsuki (Nagoya University)
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| 17:30 | Coffee Break(17:30-18:00) |
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Banquet (18:00-20:00)
Chair:--- (---) |
| 18:00 | Banquet(18:00-20:00) |
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| 18:30 |
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| 19:00 |
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| 19:30 |
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| Time | Title | Speaker |
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Session VIII:Supernova I (09:30-11:00)
Chair:--- (---) |
| 09:30 | Crossroads of Particle Physics and Core-Collapse Supernovae (09:30-10:10)
Abstract:
Core-collapse supernova explosions are among nature's most powerful astrophysical events. The associated hot and dense conditions provide complementary probes of unknown physics within and beyond the Standard Model (BSM). In this talk, I will discuss how different traditional and novel supernova-related observables can be used to explore various BSM candidates. I will also briefly discuss recent developments in understanding a puzzling aspect of neutrino physics, namely their collective flavor oscillations, and progress toward fully incorporating them into supernova modeling.
| Meng-Ru Wu (Institute of Physics, Academia Sinica) |
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| 10:00 |
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Supernova physics (10:10-10:35)
abstract/pdf | Takiwaki, Tomoya (NAOJ)
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| 10:30 |
DSNB (10:35-11:00)
abstract/pdf | Horiuchi, Shunsaku (Institute of Science Tokyo)
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| 11:00 | Coffee Break(11:00-11:30) |
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Session IX:Supernova II (11:30-12:40)
Chair:--- (---) |
| 11:30 | Overview of Experimental Searches for the Diffuse Supernova Neutrino Background (11:30-11:55)
Abstract:
The diffuse supernova neutrino background (DSNB), formed by MeV-scale neutrinos released from core collapse of massive stars over the cosmic history and floating in the Universe, is a key probe for stellar astrophysics as well as cosmic chemical evolution picture. It has been searched in various underground experiments, in particular, at water Cherenkov and liquid scintillation detectors. This talk overviews efforts and benefits in both type experiments, highlights the latest search results at Super-Kamiokande, KamLAND and JUNO, and discusses prospects in the next generation experiments.
| Yosuke Ashida (Tohoku University) |
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Hyper-Kamiokande (11:55-12:20)
Abstract:
Hyper-Kamiokande, an underground water Cherenkov detector with 260 kton total mass, is currently under construction and is scheduled to begin operation in 2028. Its primary scientific goals are the study of neutrino oscillations, the search for proton decay, and neutrino astronomy. In this talk, I will present the current status of the project and its expected physics sensitivity.
| Masashi Yokoyama (University of Tokyo) |
| 12:00 |
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Poster Award (12:20-12:30)
abstract/pdf | --- (---)
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| 12:30 | Closing (12:30-12:40)
abstract/pdf | --- (---)
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| Break(12:40-12:50) |
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closed session (12:50-13:50)
Chair:---- (----) |
| 12:50 | (closed session)総括班会議(12:50-13:50) |
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| 13:00 |
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| 13:30 |
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