A5103009037- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Radiation Detection and Scintillator Technologies
- Computational Physics and Python Applications
- Structural Behavior of Reinforced Concrete
- Fire effects on concrete materials
- Structural Load-Bearing Analysis
- Fire dynamics and safety research
- Statistical Mechanics and Entropy
- Theoretical and Computational Physics
- Scientific Research and Discoveries
- Noncommutative and Quantum Gravity Theories
- Drilling and Well Engineering
- Nuclear Physics and Applications
- Relativity and Gravitational Theory
- Atomic and Subatomic Physics Research
- Complex Systems and Time Series Analysis
- Innovation Policy and R&D
Seoul National University of Science and Technology
2018-2025
University of Seoul
2010-2014
Seoul National University
2002-2012
Korea University
2012
Institute of High Energy Physics
2010-2011
Cukurova University
2011
Hiroshima University
2002-2003
Korea Institute for Advanced Study
1999-2002
We study the correlation between CP violation in neutrino oscillations and leptogenesis framework with two heavy Majorana neutrinos three light neutrinos. Among unremovable phases, a phase contributes to leptogenesis. show how Jarlskog determinant J as well neutrinoless double beta decay by identifying low energy CP-violating which signals for For some specific cases of Dirac mass term neutrinos, direct relation lepton number asymmetry is obtained. also effect coming from phases are not related
In this document, the technical details of JSNS$^2$ (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) experiment are described. The search for sterile neutrinos is currently one hottest topics in neutrino physics. aims to existence oscillations with $\Delta m^2$ near 1 eV$^2$ Materials and Life Science Experimental Facility (MLF). A MW beam 3 GeV protons incident on a spallation neutron target produces an intense from muon decay rest. Neutrinos come predominantly $\mu^+$...
Abstract JSNS2 (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) is an experiment that searching for sterile neutrinos via the observation of $\bar{\nu }_{\mu } \rightarrow \bar{\nu }_e$ appearance oscillations using with muon decay-at-rest. For this search, rejecting cosmic-ray-induced neutron events by Pulse Shape Discrimination (PSD) essential because detector located above ground, on third floor building. We have achieved 94.95±0.15% rejection while keeping 92.82±1.77%...
We discuss how the cosmological baryon asymmetry can be achieved by lepton family asymmetries of heavy Majorana neutrino decays and are related to $CP$ violation in oscillation, minimal seesaw model with two neutrinos. derive most general formula for oscillation terms masses Yukawa mass term. It is shown that very useful classify several models which $e$, $\ensuremath{\mu}$, $\ensuremath{\tau}$ leptogenesis separately realized see they connected low energy violation. To make predictive, we...
Abstract JSNS $$^2$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow/> <mml:mn>2</mml:mn> </mml:msup> </mml:math> (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) is an experiment that searches for sterile neutrinos via the observation of $$\bar{\nu }_{\mu } \rightarrow \bar{\nu }_{e}$$ <mml:mrow> <mml:msub> <mml:mover> <mml:mi>ν</mml:mi> </mml:mrow> <mml:mo>¯</mml:mo> </mml:mover> <mml:mi>μ</mml:mi> </mml:msub> <mml:mo>→</mml:mo>...
How is CP violation of low energy related to required from baryon number asymmetry? We give an example which shows a direct link between neutrino oscillation and baryogenesis through leptogenesis.
We study lepton flavor number violating rare $B$ decays, $b\ensuremath{\rightarrow}s{l}_{h}^{\ifmmode\pm\else\textpm\fi{}}{l}_{l}^{\ensuremath{\mp}}$, in a seesaw model with low scale singlet Majorana neutrinos motivated by the resonant leptogenesis scenario. The branching ratios of inclusive decays $b\ensuremath{\rightarrow}s{l}_{h}^{\ifmmode\pm\else\textpm\fi{}}{\overline{l}}_{l}^{\ensuremath{\mp}}$ two almost degenerate at TeV are investigated detail. find that there exists class which...
Sterile neutrinos are one candidate to explain anomalies in neutrino oscillations. The mass-difference-driving oscillation between flavors can be probed only within specific combinations of baseline and flight energy. For a whose mass is completely unknown, it necessary scan all available ranges spectrum accessible baselines. Here, we present four-neutrino analysis the results announced by RENO Daya Bay, which performed definitive measurements $θ_{13}$ based on disappearance...
Abstract JSNS $$^2$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow /> <mml:mn>2</mml:mn> </mml:msup> </mml:math> (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) is an experiment that searching for sterile neutrinos via the observation of $${\bar{\nu }}_{\mu } \rightarrow {\bar{\nu }}_{e}$$ <mml:mrow> <mml:msub> <mml:mover> <mml:mi>ν</mml:mi> </mml:mrow> <mml:mo>¯</mml:mo> </mml:mover> <mml:mi>μ</mml:mi> </mml:msub> <mml:mo>→</mml:mo>...
This article describes the goal and expected sensitivity of JSNS$^2$-II experiment at J-PARC Materials Life Science Experimental Facility (MLF). The is second phase JSNS$^2$ (J-PARC Sterile Neutrino Search Spallation Neutron Source) with two detectors which are located in 24 m (an existing detector) 48 (new one) baselines to improve search for sterile neutrinos, especially low $Δm^2$ region, has been indicated by global fit appearance mode. new detector a similar structure as detector,...
Using the recent measurement of SNO salt phase experiment, we investigate how much solar neutrino flux deficit observed at could be due to $\nu_e$ transition into antineutrino. Our analysis leads rather optimistic conclusion that data may indicate existence Majorana magnetic moment. The prospect for future BOREXINO experiment is also discussed.
A tilted brane in theories with large compact extra dimensions leads to spontaneous symmetry breaking of the Lorentz and rotational invariance four dimensions, as shown by Dvali Shifman. In this Brief Report, we point out that mentioned breaking, although leading $\mathrm{CPT}$-violating interaction terms, cannot lead $\mathrm{CPT}$ violation experimentally interesting $K\ensuremath{-}\overline{K}$ analogous systems.
The JSNS2 (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) experiment aims to search for neutrino oscillations over a 24 m short baseline . inner detector is filled with 17 tons of gadolinium-loaded liquid scintillator (LS) and both the intermediate γ-catcher optically separated outer veto are un-loaded LS Optical photons from scintillation observed by 120 Photomultiplier Tubes (PMTs). A total 130 PMTs were either donated other experiments or purchased Hamamatsu. Donated...
이 연구에서는 구조계산이나 구조설계 시 화재에 노출된 FSFB 부재의 성능에 대한 수치적 기준을 제시하기 위해 하중비에 따른 FSFB의 내화성능에 해석적 연구를 수행하였다. 다른 종류의 슬림 플로어 보과 달리 FSFB는 제조 과정에서 공기층을 가지고 있어 내화성이 우수하다. 또한, 저방사 필름 적용으로 공기층에서의 열전달을 감소시켜 내화 성능을 향상시킨다. 이를 고려하기 유한요소모델을 사용하였고, 변수해석을 유한요소 모델은 참고문헌의 시험 및 해석결과 비교하여 타당성을 검증하였으며, 검증된 모델을 통해 하중비와 필름의 적용을 변수로 하여 해석을 해석 결과를 변수에 내화성능을 비교하였고, 하중비를 독립 한 내화성능 회귀식을 도출하였다. 이러한 적용 여부에 용도 규모별 계산하였다.
The JSNS2 (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) experiment aims to search for neutrino oscillations over a 24 m short baseline J-PARC. inner detector is filled with 17 tons of gadolinium(Gd)-loaded liquid scintillator (LS) an additional 31 unloaded LS in the intermediate γ-catcher and optically separated outer veto volumes. A total 120 10-inch photomultiplier tubes observe scintillating optical photons each analog waveform stored flash analog-to-digital...
The JSNS$^2$ experiment is aimed to search for sterile neutrino oscillations using a beam from muon decays at rest. detector contains 17 tons of 0.1\% gadolinium (Gd) loaded liquid scintillator (LS) as target. Detector construction was completed in the spring 2020. A slow control and monitoring system (SCMS) implemented reliable quick operational status environmental conditions. It issues an alarm if any monitored parameters exceed preset acceptable range. SCMS monitors high voltage (HV)...
Abstract The Sterile Neutrino Search at the J-PARC Spallation Neutron Source (JSNS$^2$) experiment aims to search for sterile neutrino oscillations using a beam from muon decays rest. JSNS$^2$ detector contains 17 tons of 0.1$\%$ gadolinium (Gd) loaded liquid scintillator (LS) as target. Detector construction was completed in spring 2020. A slow control and monitoring system (SCMS) implemented reliable quick operational status environmental conditions. It issues an alarm if any monitored...
Abstract The JSNS 2 (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) is an experiment designed for the search sterile neutrinos. currently stage of second phase named -II with two detectors near and far locations from neutrino source. One key components acrylic vessel, that used target volume detection anti-neutrinos. specifications, design, measured properties vessel are described.