Ken‐ichi Hikasa
A5056736617- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Particle Detector Development and Performance
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Distributed and Parallel Computing Systems
- Atomic and Subatomic Physics Research
- Particle Dynamics in Fluid Flows
- Particle Accelerators and Free-Electron Lasers
- Muon and positron interactions and applications
- Magnetic confinement fusion research
- International Science and Diplomacy
- Advanced NMR Techniques and Applications
- Quantum, superfluid, helium dynamics
- Algebraic and Geometric Analysis
- Electromagnetic Scattering and Analysis
- Statistical Mechanics and Entropy
- Cryospheric studies and observations
- Acoustic Wave Resonator Technologies
- Climate change and permafrost
Tohoku University
2012-2024
Oklahoma State University
2004
Lawrence Berkeley National Laboratory
1996
European Organization for Nuclear Research
1994
High Energy Accelerator Research Organization
1984-1992
Deutsches Elektronen-Synchrotron DESY
1988
University of Wisconsin–Madison
1984-1987
The University of Tokyo
1980-1986
Kyoto University
1982
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,062 new measurements 721 papers, we list, evaluate, average measured properties gauge bosons the recently discovered Higgs boson, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. All search limits are listed in Summary Tables. also give numerous tables, figures, formulae, reviews...
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,873 new measurements 758 papers, we list, evaluate, average measured properties gauge bosons the recently discovered Higgs boson, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle search limits are listed in Summary Tables. give numerous tables, figures, formulae, reviews...
This biennial Review summarizes much of particle physics. Using data from previous editions, plus 2658 new measurements 644 papers, we list, evaluate, and average measured properties gauge bosons, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as Higgs heavy neutrinos, supersymmetric particles. All the search limits are listed in Summary Tables. also give numerous tables, figures, formulae, reviews topics Standard Model, detectors, probability,...
Abstract The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,143 new measurements 709 papers, we list, evaluate, average measured properties gauge bosons the recently discovered Higgs boson, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle search limits are listed in Summary Tables. give numerous tables, figures, formulae,...
Abstract The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,324 new measurements 878 papers, we list, evaluate, average measured properties gauge bosons the recently discovered Higgs boson, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle search limits are listed in Summary Tables. give numerous tables, figures, formulae,...
This biennial review summarizes much of Particle Physics. Using data from previous editions, plus 1900 new measurements 700 papers, we list, evaluate, and average measured properties gauge bosons, leptons, quarks, mesons, baryons. We also summarize searches for hypothetical particles such as Higgs heavy neutrinos, supersymmetric particles. All the particle search limits are listed in Summary Tables. give numerous tables, figures, formulae, reviews topics Standard Model, detectors,...
The summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,717 new measurements 869 papers, we list, evaluate, average measured properties gauge bosons the recently discovered Higgs boson, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle search limits are listed in Summary Tables. give numerous tables, figures, formulae, reviews topics...
This biennial Review summarizes much of Particle Physics. Using data from previous editions, plus 2205 new measurements 667 papers, we list, evaluate, and average measured properties gauge bosons, leptons, quarks, mesons, baryons. We also summarize searches for hypothetical particles such as Higgs heavy neutrinos, supersymmetric particles. All the particle search limits are listed in Summary Tables. give numerous tables, figures, formulae, reviews topics Standard Model, detectors,...
We examine the production and decay of a supersymmetric scalar top t${\ifmmode \tilde{}\else \~{}\fi{}}_{1}$ at ${e}^{+}$${e}^{\mathrm{\ensuremath{-}}}$ colliders such as TRISTAN KEK, Stanford Linear Collider, LEP CERN, based on models with soft breaking. Existing bounds for particles imply that in energy range these would be lighter than other quarks quark. make careful study available modes this scenario. The flavor-changing...
We systematically calculate various flavor-changing neutral-current top-quark processes induced by supersymmetry at the Large Hadron Collider, which include five decay modes and six production channels. To reveal characteristics of these processes, we first compare dependence rates for channels on relevant supersymmetric parameters, then scan whole parameter space to find their maximal rates, including all direct indirect current experimental constraints scharm-stop flavor mixings. that,...
A bstract Given that the LHC experiment has produced strong constraints on colored supersymmetric particles (sparticles), testing electroweak supersymmetry (EWSUSY) will be next crucial task at LHC. On other hand, light electroweakinos and sleptons in EWSUSY can also contribute to dark matter (DM) low energy lepton observables. The precision measurements of them provide indirect evidence SUSY. In this work, we confront with muon g − 2 anomaly, DM relic density, direct detection limits latest...
We perform a comprehensive study of the effects related to heavy-quark threshold in production and decay scalar or pseudoscalar Higgs particle. QCD corrections mode into quark-antiquark pair also mixing boson with quarkonium states, both below above open-flavor threshold, which can change properties drastically. Numerical results for mass around 10 GeV, where $b\overline{b}$ states has great influence on widths branching ratios, are worked out detail cases standard model minimal...
We study the production and subsequent decays of S- P-wave quarkonium states a heavy quark that may be produced at multi-TeV hadron collider. Our considerations are focused on lighter member fourth-generation doublet, for which weak expected to suppressed by mixing angles. For masses \ensuremath{\lesssim}1 TeV, dominant is via gluon fusion. In addition decay channels present in charm bottom systems, quarkonia can into ${W}^{+}$${W}^{\mathrm{\ensuremath{-}}}$, ${Z}^{0}$${Z}^{0}$,...
Motivated by the latest results of LHC Run-2 and LUX experiments, we examine status constrained minimal supersymmetric standard model (CMSSM) performing a global fit. We construct likelihood function including electroweak precision observables, $B$-physics measurements, Run-1 -2 data SUSY direct searches, Planck observation dark matter relic density combined Run-3 -4 detection limits. Based on profile functions 1 billion samples, obtain following observations: (i) The stau coannihilation...
We present an analysis of the discovery reach for supersymmetric particles at upgraded Tevatron collider, assuming that SUSY breaking results in universal soft parameters grand unification scale, and lightest particle is stable neutral. first a review literature, including issues unification, renormalization group evolution supersymmetry effect radiative corrections on effective low energy couplings masses theory. consider experimental bounds coming from direct searches those arising...
Electrons and positrons in storage rings have natural polarization which is perpendicular to the beam direction. Effects of transverse azimuthally integrated cross sections are studied. In standard model, does not affect section up a correction proportional electron mass, negligible at high energies. This fact closely related chiral symmetry model. It necessarily true if there new interactions beyond Polarization effects composite supersymmetric models studied detail. New particles such as...