R. Yonamine
A5084965550- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- Radiation Detection and Scintillator Technologies
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Quantum Chromodynamics and Particle Interactions
- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Particle Accelerators and Free-Electron Lasers
- CCD and CMOS Imaging Sensors
- Advanced Semiconductor Detectors and Materials
- Superconducting Materials and Applications
- International Science and Diplomacy
- Distributed and Parallel Computing Systems
- Quantum and electron transport phenomena
- Computational Physics and Python Applications
- Muon and positron interactions and applications
- Infrared Target Detection Methodologies
- Gas Sensing Nanomaterials and Sensors
- Spectroscopy and Laser Applications
- Quantum Information and Cryptography
- Environmental Impact and Sustainability
- Inorganic Fluorides and Related Compounds
- Advancements in Semiconductor Devices and Circuit Design
- Nuclear reactor physics and engineering
Université Libre de Bruxelles
2014-2023
Tohoku University
2020-2022
Parc Científic de la Universitat de València
2022
Fujikura (Japan)
2022
Instituto de Física Corpuscular
2022
Universitat de València
2022
The Graduate University for Advanced Studies, SOKENDAI
2008-2020
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2017-2018
CEA Paris-Saclay
2017-2018
Institut de Recherche sur les Lois Fondamentales de l'Univers
2017-2018
An upgrade program is planned for the LHC which will smoothly bring luminosity up to or above 5×1034 cm−2 s−1 sometimes after 2020, possibly reach an integrated of 3000 fb−1 at end that decade. In this ultimate scenario, called Phase-2, when High Luminosity phase (HL-LHC), CMS need a completely new Tracker detector, in order fully exploit highly-demanding operating conditions and delivered luminosity. The should have also trigger capabilities. To achieve such goals, R&D activities are...
Results are presented from a search in the dijet final state for new massive narrow resonances decaying to pairs of $W$ and $Z$ bosons or $W/Z$ boson quark. based on data recorded proton-proton collisions at $\sqrt{s}=13\text{ }\text{ }\mathrm{TeV}$ with CMS detector CERN LHC. The correspond an integrated luminosity $35.9\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. mass range investigated extends upwards 1.2 TeV. No excess is observed above estimated standard model background limits set 95%...
The double-differential inclusive jet cross section is measured as a function of transverse momentum $$p_{\mathrm {T}}$$ and absolute rapidity $$|y |$$ , using proton-proton collision data collected with the CMS experiment at LHC, center-of-mass energy $$\sqrt{s} = 2.76\,{\mathrm{TeV}}$$ corresponding to an integrated luminosity 5.43 $$\,\text {pb}^{-1}$$ . Jets are reconstructed within range 74 592 {GeV}$$ |<3.0$$ spectrum corrected for detector resolution. measurements compared theoretical...
An analysis of the decay $\Lambda_b \to J/\psi(\to\mu^+\mu^-)\Lambda(\to p \pi^-)$ is performed to measure $\Lambda_b$ polarization and three angular parameters in data from pp collisions at $\sqrt{s} =$ 7 8 TeV, collected by CMS experiment LHC. The measured be 0.00 $\pm$ 0.06 (stat) (syst) parity-violating asymmetry parameter determined 0.14 0.10 (syst). measurements are compared various theoretical predictions, including those perturbative quantum chromodynamics.
We report on the feasibility of direct measurement top Yukawa coupling g_t at International Linear Collider (ILC) during its first phase operation with a center-of-mass energy 500 GeV. The signal and background models incorporate non-relativistic QCD corrections which enhance production cross section near t-tbar threshold. e+e- -> t tbar H is reconstructed in 6-jet + lepton 8-jet modes. results from two channels are combined. processes considered bbar W- / b W+ (which includes tbar), Z, g*...
Results are presented from a search for supersymmetry in events with single electron or muon and hadronic jets. The data correspond to sample of proton-proton collisions at $\sqrt{s} = $ 13 TeV an integrated luminosity 35.9 fb$^{-1}$, recorded 2016 by the CMS experiment. A number exclusive regions defined according jets, b-tagged scalar sum transverse momenta missing momentum lepton. Standard model background reduced significantly requiring large azimuthal angle between direction lepton...
We present a new measurement of the bottom quark mass in MS[over ¯] scheme at renormalization scale Higgs boson from measurements decay rates LHC: m_{b}(m_{H})=2.60_{-0.31}^{+0.36} GeV. The has negligible theory uncertainty and excellent prospects to improve HL-LHC future factory. Confronting this result m_{b}(m_{b}) low-energy m_{b}(m_{Z}) Z-pole data, with prediction evolution group equations, we find strong evidence for "running" mass.
Measurements are presented of the lifetimes $${\mathrm {B}^0}$$ , $$\mathrm {B}^0_\mathrm {s}$$ {\Lambda }_\mathrm {b} ^0$$ and {B}_\mathrm {c}^+$$ hadrons using decay channels {B}^0}\!\rightarrow \! \mathrm {J}/\psi {K^{*}(892)}{}^{0}$$ {K^0_S}$$ {s} \!\rightarrow {\pi ^+}\mathrm ^-}$$ {\phi (1020)}$$ $$\varLambda _\mathrm {b}^0\!\rightarrow \!\mathrm }^{0}$$ {c}^+ ^+}$$ . The data sample, corresponding to an integrated luminosity 19.7 $$\,\text {fb}^\text {-1}$$ was collected by CMS...
Unprecedented charged particle momentum resolution is required for precision Higgs studies at the International Linear Collider (ILC), which in turn demands as many 200 sampling points with a high spatial of 100 microns or better if we are to adopt TPC central tracker. We discuss novel theoretical formula GEM-readout TPC, applicable inclined tracks opposed previous valid only normal incidence. The identifies key factors that determine and helps optimize readout pad geometry High Voltage...
To aid contributions to the Snowmass 2021 US Community Study on physics at International Linear Collider and other proposed $e^+e^-$ colliders, we present a list of study questions that could be basis useful projects. We accompany this with links references resources physics, description new software framework are preparing for studies Snowmass.
For the International Large Detector concept at planned Linear Collider, use of time projection chambers (TPC) with micro-pattern gas detector readout as main tracking is investigated. In this paper, results from a prototype TPC, placed in 1 T solenoidal field and read out three independent GEM-based modules, are reported. The TPC was exposed to 6 GeV electron beam DESY II synchrotron. efficiency for reconstructing hits, measurement drift velocity, space point resolution control...
A Time Projection Chamber (TPC) is chosen for the central tracker of ILD detector, one two detector concepts planned International Linear Collider (ILC). Physics goals at ILC will require a TPC with position resolution 100 μm and superior track separation, which are not achievable conventional Multi-Wire Proportional (MWPC) readout. MPGD readout offers improved separation due to measuring signal anode minimization E × B effect. For several years, LC collaboration has been developing using...
Positive ion feedback can be problematic in a high precision Time Projection Chamber (TPC) as proposed for the International Linear Collider (ILC). Use of traditional wire gating device would increase dead areas planned module structure. F. Sauli proposed, 2006, use Gas Electron Multiplier (GEM) device. We have measured electron transparency 14 μm thick GEM 1 T magnetic field. The does not meet requirement TPC at ILC. performed simulation study using Garfield++ to understand important...
Access to the photon polarisation in 1-100 MeV energy range is a challenge for next generation of space telescopes. The current telescopes are almost blind this range, mainly due degradation angular resolution e+e- pair and elastic scattering matter. Pair-conversion detector technologies as gaseous detectors promising alternative based on tungsten-converter/thin-sensitive-layer stacks such COS-B/EGRET/Fermi-LAT, firstly improve single-photon secondly information. use time projection chamber...
In this white paper for the Snowmass '21 community planning exercise we provide quantitative prospects bottom quark mass measurements in high-energy collisions at future colliders that can a precise test of scale evolution, or "running" masses predicted by QCD.
We have developed an optical-fiber-based Hall potential imaging system using the Pockels effect in GaAs/AlGaAs two dimensional electron systems (2DES) quantum regime to investigate current distributions. The mapping of shows concentration at bulk region 2DES samples, where critical depends on channel width sub-linearly. report detail experimental techniques operating high magnetic fields.