A5087209263- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Neutrino Physics Research
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Solar and Space Plasma Dynamics
- Nuclear reactor physics and engineering
- Atomic and Subatomic Physics Research
- Black Holes and Theoretical Physics
- Nuclear Physics and Applications
- Advancements in Semiconductor Devices and Circuit Design
- Particle Accelerators and Free-Electron Lasers
- Radiation Therapy and Dosimetry
- Distributed and Parallel Computing Systems
- Stochastic processes and financial applications
- Noncommutative and Quantum Gravity Theories
- VLSI and Analog Circuit Testing
- Medical Imaging Techniques and Applications
- Quantum, superfluid, helium dynamics
- Ionosphere and magnetosphere dynamics
University of Seoul
2021-2025
A. Alikhanyan National Laboratory
2022-2024
Institute of High Energy Physics
2022-2024
University of Antwerp
2024
The University of Texas at Arlington
2022-2024
University of Kansas
2022-2023
Kyungpook National University
2015-2023
Abdus Salam Centre for Physics
2022-2023
University of Warsaw
2023
Yonsei University
2023
We report the observation of new properties primary iron (Fe) cosmic rays in rigidity range 2.65 GV to 3.0 TV with 0.62×106 nuclei collected by Alpha Magnetic Spectrometer experiment on International Space Station. Above 80.5 dependence ray Fe flux is identical He, C, and O fluxes, Fe/O ratio being constant at 0.155±0.006. This shows that unexpectedly belong same class which different from Ne, Mg, Si class.Received 2 October 2020Revised 22 November 2020Accepted 9 December...
We report the observation of new properties primary cosmic rays, neon (Ne), magnesium (Mg), and silicon (Si), measured in rigidity range 2.15 GV to 3.0 TV with 1.8×10^{6} Ne, 2.2×10^{6} Mg, 1.6×10^{6} Si nuclei collected by Alpha Magnetic Spectrometer experiment on International Space Station. The Ne Mg spectra have identical dependence above 3.65 GV. three 86.5 GV, deviate from a single power law 200 harden an way. Unexpectedly, rays is different He, C, O. This shows that O are two classes rays.
We present the precision measurement of daily proton fluxes in cosmic rays from May 20, 2011 to October 29, 2019 (a total 2824 days or 114 Bartels rotations) rigidity interval 1 100 GV based on 5.5×10^{9} protons collected with Alpha Magnetic Spectrometer aboard International Space Station. The exhibit variations multiple timescales. From 2014 2018, we observed recurrent flux a period 27 days. Shorter periods 9 and 13.5 are 2016. strength all three periodicities changes time rigidity....
Precision measurements by the Alpha Magnetic Spectrometer (AMS) on International Space Station of ^{3}He and ^{4}He fluxes are presented. The based 100 million nuclei in rigidity range from 2.1 to 21 GV 18 1.9 15 collected May 2011 November 2017. We observed that exhibit nearly identical variations with time. relative magnitude decreases increasing rigidity. dependence ^{3}He/^{4}He flux ratio is measured for first Below 4 GV, was found have a significant long-term time dependence. Above be...
We present the precision measurement of 2824 daily helium fluxes in cosmic rays from May 20, 2011 to October 29, 2019 rigidity interval 1.71 100 GV based on 7.6×10^{8} nuclei collected with Alpha Magnetic Spectrometer (AMS) aboard International Space Station. The flux and proton ratio exhibit variations multiple timescales. In nearly all time intervals 2014 2018, we observed recurrent a period 27 days. Shorter periods 9 days 13.5 are 2016. strength three periodicities changes rigidity....
We present the precision measurements of 11 years daily cosmic electron fluxes in rigidity interval from 1.00 to 41.9 GV based on 2.0×10^{8} electrons collected with Alpha Magnetic Spectrometer (AMS) aboard International Space Station. The exhibit variations multiple timescales. Recurrent flux periods 27 days, 13.5 and 9 days are observed. find that show distinctly different time proton fluxes. Remarkably, a hysteresis between is observed significance greater than 6σ at rigidities below 8.5...
We report the properties of sodium (Na) and aluminum (Al) cosmic rays in rigidity range 2.15 GV to 3.0 TV based on 0.46 million 0.51 nuclei collected by Alpha Magnetic Spectrometer experiment International Space Station. found that Na Al, together with nitrogen (N), belong a distinct ray group. In this group, we observe that, similar N flux, both flux Al are well described sums primary component (proportional silicon flux) secondary fluorine flux). The fraction increases for N, Na, fluxes...
Abstract This paper reports on a measurement of electron-ion recombination in liquid argon the ICARUS time projection chamber (LArTPC). A clear dependence angle ionizing particle track relative to drift electric field is observed. An ellipsoid modified box (EMB) model describes data across all measured angles. These measurements are used for calorimetric energy scale calibration TPC, which also presented. The impact EMB studied identification, as well muon and proton measurements. Accounting...
An $s$-jet tagging approach to determine the Cabibbo-Kobayashi-Maskawa matrix component $|V_{ts}|$ directly in dileptonic final state events of top pair production proton-proton collisions has been previously studied by measuring branching fraction decay one quarks $t \to sW$. The main challenge is improving discrimination performance between strange jets from decays and other jets. This study proposes novel jet discriminators, called DISAJA, using a Transformer-based deep learning method....
Flavor-changing neutral currents (FCNCs) are forbidden at tree level in the Standard Model (SM), but they can be enhanced physics Beyond (BSM) scenarios.In this paper, we investigate effectiveness of deep learning techniques to enhance sensitivity current and future collider experiments production a top quark an associated parton through $tqg$ FCNC process, which originates from $tug$ $tcg$ vertices. The events produced with either gluon or quark, while SM only has quark. We apply machine...
Abstract The Gas Electron Multiplier (GEM) detectors of the GE1/1 station CMS experiment have been operated in magnetic field for first time on 7 th October 2021. During ramps, several discharge phenomena were observed, leading to instability GEM High Voltage (HV) power system. In order reproduce behavior, it was decided conduct a dedicated test at CERN North Area with Goliath magnet, using four spare chambers. consisted studying characteristics events that occurred different detector...
<title>Abstract</title> Flavor-changing neutral currents (FCNCs) are forbidden at tree level in the Standard Model (SM), but they can be enhanced physics Beyond (BSM) scenarios.To test these potential enhancements, we investigate production of a top quark and an associated parton through $tqg$ FCNC process, which originates from $tug$ $tcg$ vertices.The events produced with either gluon or quark, while SM only has quark. We apply machine learning techniques to distinguish backgrounds,...
Abstract In 2018, a system of large-size triple-GEM demonstrator chambers was installed in the CMS experiment at CERN's Large Hadron Collider (LHC). The demonstrator's design mimicks that final detector, for Run-3. A successful Monte Carlo (MC) simulation collision-induced background hit rate this proton-proton collisions 13 TeV is presented. MC predictions are compared to measurements recorded an instantaneous luminosity 1.5 ×10 34 cm -2 s -1 . framework uses combination FLUKA and GEANT4...
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