A5056735605- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Strong Light-Matter Interactions
- Black Holes and Theoretical Physics
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Particle Detector Development and Performance
- Nuclear physics research studies
- Quantum Information and Cryptography
- Astrophysics and Cosmic Phenomena
- Physics of Superconductivity and Magnetism
- Cold Atom Physics and Bose-Einstein Condensates
- Superconducting and THz Device Technology
- Scientific Research and Discoveries
- Advanced NMR Techniques and Applications
- Enzyme Structure and Function
- Advanced Sensor Technologies Research
- Advanced MEMS and NEMS Technologies
- Radiation Detection and Scintillator Technologies
Chung-Ang University
2023-2025
Institute for Basic Science
2019-2024
Institute of High Energy Physics
2023-2024
Soochow University
2022-2023
Inner Mongolia University
2023
Henan University
2023
University of Groningen
2023
Korea Advanced Institute of Science and Technology
2017-2022
RIKEN
2022
RIKEN Center for Quantum Computing
2022
The Center for Axion and Precision Physics Research at the Institute Basic Science is searching axion dark matter using ultralow temperature microwave resonators. We report exclusion of mass range $10.7126--10.7186\text{ }\text{ }\ensuremath{\mu}\mathrm{eV}$ with near Kim-Shifman-Vainshtein-Zakharov (KSVZ) coupling sensitivity $10.16--11.37\text{ about 9 times larger 90% confidence level. This first search result in these ranges. It also a resonator physical less than 40 mK.
We report an axion dark matter search at Dine-Fischler-Srednicki-Zhitnitskii sensitivity with the CAPP-12TB haloscope, assuming axions contribute 100% of local density. The excluded axion-photon coupling g_{aγγ} down to about 6.2×10^{-16} GeV^{-1} over mass range between 4.51 and 4.59 μeV a 90% confidence level. achieved experimental can also exclude Kim-Shifman-Vainshtein-Zakharov that makes up just 13% haloscope will continue wide masses.
We present the first results of a search for invisible axion dark matter using multiple-cell cavity haloscope. This concept was proposed to provide highly efficient approach high mass regions compared conventional multiple-cavity design, with larger detection volume, simpler detector setup, and unique phase-matching mechanism. Searches double-cell superseded previous reports axion-photon coupling over range between 13.0 13.9$\,\mu$eV. result not only demonstrates novelty high-mass searches,...
In cavity-based axion dark matter search experiments exploring high mass regions, multiple-cavity design is under consideration as a method to increase the detection volume within given magnet bore. We introduce new idea, referred multiple-cell cavity, which provides various benefits including larger volume, simpler experimental setup, and easier phase-matching mechanism. present characteristics of this concept demonstrate feasibility with an example double-cell cavity.
The axion has emerged as the most attractive solution to two fundamental questions in modern physics related charge-parity invariance strong interactions and invisible matter component of our Universe. Over past decade, there have been many theoretical efforts constrain mass based on various cosmological assumptions. Interestingly, different approaches from independent groups produce good overlap between 20 30 μeV. We performed an experimental search probe presence dark axions within this...
We report an extensive high-sensitivity search for axion dark matter above 1 GHz at the Center Axion and Precision Physics Research (CAPP). The cavity resonant search, exploiting coupling between axions photons, explored frequency (mass) range of 1.025 (<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>4.24</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi mathvariant="normal">μ</a:mi><a:mi>eV</a:mi></a:mrow></a:math>) to 1.185 (<d:math...
In the search for axion dark matter, cavity-based haloscope offers most sensitive approach to theoretically interesting models in microwave region. However, experimental searches have been limited relatively low masses up a few tens of $\mathrm{\ensuremath{\mu}}\mathrm{eV}$, benefiting from large detection volumes and high-quality factors given setup. We propose new cavity design suitable higher mass regions with enhanced performance. The features periodic arrangement dielectric material...
The haloscope is one of the most sensitive approaches to QCD axion physics within region where considered be a dark matter candidate. Current experimental sensitivities, which rely on lowest fundamental TM010 mode cylindrical cavity, are limited relatively low mass regions. Exploiting higher-order resonant modes would beneficial because it will enable us extend search range with no volume loss and higher quality factors. This approach has been discarded mainly significant degradation form...
The cavity haloscope has been employed to detect microwave photons resonantly converted from invisible cosmic axions under a strong magnetic field. In this scheme, the axion-photon conversion power formulated be valid for certain conditions, either Q ≪ axion or ≫ . This remedy, however, fails when these two quantities are comparable each other. Furthermore, noise flow treated independently of impedance mismatch system, which could give rise misleading estimates experimental sensitivity. We...
The axion offers a well-motivated solution to two fundamental questions in modern physics: the strong CP problem and dark matter mystery. Cavity haloscopes, exploiting resonant enhancement of photon signals, provide most sensitive searches for microwave region. However, current experimental sensitivities are limited <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="m1"><mml:mi mathvariant="script">O</mml:mi><mml:mrow><mml:mo...
We report an extensive high-sensitivity search for axion dark matter above 1\,GHz at the Center Axion and Precision Physics Research (CAPP). The cavity resonant search, exploiting coupling between axions photons, explored frequency (mass) range of 1.025\,GHz (4.24\,$\mu$eV) to 1.185\,GHz (4.91\,$\mu$eV). have introduced a number innovations in this field, demonstrating practical approach optimizing all relevant parameters haloscopes, extending presently available technology. CAPP 12\,T...
We describe a new axion search method based on measuring the variance in interference of signal using injected photons with power detector. The need for linear amplifier is eliminated by putting strong into microwave cavity, to acquire not only excess but also measure output power. external photon converted greatly enhances at particular frequency, providing evidence its existence. This has an advantage that it can always obtain sensitivity near quantum noise limit even detector high dark...
We report the first search for Sagittarius tidal stream of axion dark matter around $4.55\text{ }\text{ }\mathrm{\ensuremath{\mu}eV}$ using CAPP-12 TB haloscope data acquired in March 2022. Our result excluded Dine-Fischler-Srednicki-Zhitnitskii and Kim-Shifman-Vainshtein-Zakharov densities ${\ensuremath{\rho}}_{a}\ensuremath{\gtrsim}0.184$ $\ensuremath{\gtrsim}0.025\text{ }\mathrm{GeV}/{\mathrm{cm}}^{3}$, respectively, over a mass range from 4.51 to $4.59\text{ at 90% confidence level.
Quantification of radioactivity in the body by vivo bioassay uses counting efficiencies obtained from calibration a phantom. Usually standardised BOMAB (Bottle Manikin Absorption) phantom is employed for whole-body counting. The physical size workers being counted, however, may differ phantom, and can be source significant errors dose estimates. A methodology was developed applying subject-specific efficiency data determined Monte Carlo simulation based on voxel that constructed photographic...
We obtain a phenomenologically acceptable Cabibbo-Kobayashi-Maskawa matrix in flipped SU(5) model inspired by the compactification of heterotic string $E_8\times E_8'$.
We obtain a phenomenologically acceptable PMNS matrix in flipped SU(5) model inspired by the compactification of heterotic string $E_8\times E_8'$. To analyze Jarlskog determinant efficiently, we include simple Kim-Seo form for Pontecorbo-Maki-Nakagawa-Sakata matrix. also noted that $|\delta_{\rm PMNS}|\lesssim 64^{\rm o}$ normal hierarchy neutrino masses with PDG book parametrization.
We report an axion dark matter search at Dine-Fischler-Srednicki-Zhitnitskii sensitivity with the CAPP-12TB haloscope, assuming axions contribute 100\% of local density. The excluded axion--photon coupling $g_{aγγ}$ down to about $6.2\times10^{-16}$ GeV$^{-1}$ over mass range between 4.51 and 4.59 $μ$eV a 90\% confidence level. achieved experimental can also exclude Kim-Shifman-Vainshtein-Zakharov that makes up just 13\% haloscope will continue wide masses.
Axion, a hypothetical particle originally emerging from proposed solution to the strong $CP$ problem of physics, is one favored candidates addressing dark matter puzzle. As part efforts within Center for Axion and Precision Physics Research Institute Basic Science, we are searching axion using haloscope method sensitive masses around $24.5~\mathrm{eV}$ at Kim-Shifman-Vainshtein-Zakharov (KSVZ) sensitivity. A unique 8-cell cavity, used first time in search KSVZ axions, cooled down...
The axion offers a well-motivated solution to two fundamental questions in modern physics: the strong CP problem and dark matter mystery. Cavity haloscopes, exploiting resonant enhancement of photon signals, provide most sensitive searches for microwave region. However, current experimental sensitivities are limited O(10^0) ueV range, while recent theoretical predictions mass favor up O(10^2) ueV, suggesting need new approaches that suitable higher regions. CAPP has developed/proposed...
The cavity haloscope is among the most widely adopted experimental platforms designed to detect dark matter axions with its principle relying on conversion of into microwave photons in presence a strong magnetic field. Josephson parametric amplifier (JPA), known for quantum-limited noise characteristics, has been incorporated detection system capture weakly interacting axion signals. However, performance JPA can be influenced by environment, leading potential unreliability predefined...