Junji Hisano
A5063529959- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Quantum Chromodynamics and Particle Interactions
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- High-Energy Particle Collisions Research
- Astrophysics and Cosmic Phenomena
- Quantum, superfluid, helium dynamics
- Scientific Research and Discoveries
- Radioactive Decay and Measurement Techniques
- Particle Accelerators and Free-Electron Lasers
- Cold Atom Physics and Bose-Einstein Condensates
- Superconducting Materials and Applications
- International Science and Diplomacy
- Radiation Therapy and Dosimetry
- Radiation Detection and Scintillator Technologies
- Gamma-ray bursts and supernovae
- Quantum chaos and dynamical systems
- Physics of Superconductivity and Magnetism
- Magnetic confinement fusion research
- Characterization and Applications of Magnetic Nanoparticles
Nagoya University
2015-2024
The University of Tokyo
2010-2023
Obayashi (Japan)
2015-2022
Kavli Institute for the Physics and Mathematics of the Universe
2008-2016
Institute for Cosmic Ray Research
2006
Tohoku University
1992-2004
High Energy Accelerator Research Organization
1997-2002
European Organization for Nuclear Research
2001-2002
Japan Society for the Promotion of Science
1997
University of Minnesota
1997
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...
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,...
Various lepton-flavor violating (LFV) processes in the supersymmetric standard model with right-handed neutrino supermultiplets are investigated detail. It is shown that large LFV rates obtained when $\tan \beta $ large. In case where mixing matrix lepton sector has a similar structure as Kobayashi-Maskawa and third-generation Yukawa coupling of top quark, branching ratios can be $Br(\mu\rightarrow e\gamma)\simeq 10^{-11}$ $Br(\tau\rightarrow\mu\gamma)\simeq 10^{-7}$, which within reach...
Detection of gamma rays from dark matter annihilation in the galactic center is one feasible techniques to search for matter. We evaluate gamma-ray flux case that has an electroweak $\mathrm{S}\mathrm{U}(2{)}_{L}$ charge. Such realized minimal supersymmetric standard model (MSSM) when lightest SUSY particle Higgsino- or Wino-like neutralino. When heavy compared weak gauge bosons, leading-order calculation cross sections perturbation breaks down due a threshold singularity. take into account...
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...
In this Letter we study pair annihilation processes of dark matter (DM) in the Universe, case that DM is an electroweak gauge nonsinglet. current which highly nonrelativistic, nonperturbative effect may enhance cross sections, especially for to two photons, by several orders magnitude. We also discuss sensitivities future searches anomalous gamma rays from galactic center, originate annihilation.
We present the physics program of Belle II experiment, located on intensity frontier SuperKEKB $e^+e^-$ collider. collected its first collisions in 2018, and is expected to operate for next decade. It anticipated collect 50/ab collision data over lifetime. This book outcome a joint effort collaborators theorists through theory interface platform (B2TiP), an that commenced 2014. The aim B2TiP was elucidate potential impacts program, which includes wide scope topics: B physics, charm, tau,...
This chapter of the report "Flavor in era LHC" Workshop discusses theoretical, phenomenological and experimental issues related to flavor phenomena charged lepton sector conserving CP-violating processes. We review current limits main theoretical models for structure fundamental particles. analyze consequences available data, setting constraints on explicit beyond standard model, presenting benchmarks discovery potential forthcoming measurements both at LHC low energy, exploring options...
In the original version of this manuscript, an error was introduced on pp352. '2.7nb:1.6nb' has been corrected to '2.4nb:1.3nb' in current online and printed version. doi:10.1093/ptep/ptz106.
We discuss issues in an attempt to put the Standard Model (SM) five-dimensional anti-de Sitter spacetime compactified on $S^1/Z_2$. The recently-proposed approach gauge hierarchy problem by using this background geometry, with SM confined a boundary, is extended situation where (some of) particles reside five dimensional bulk. In particular, we find localization of zero modes bulk fermions near boundary negative tension. Unlike compactification flat metric, these fermion couple Kaluza-Klein...
Taking the solar and atmospheric neutrino experiments into account we discuss lepton flavor violating processes, such as $\tau\to\mu\gamma$ or $\mu\to e\gamma$, in minimal supersymmetric standard model with right-handed neutrinos (MSSMRN) SU(5) GUT (SU(5)RN). The predicted branching ratio of e\gamma$ MSSMRN MSW large angle solution is so that it goes beyond current experimental bound if second-generation Majorana mass $M_{\nu_2}$ greater than $\sim 10^{13}(\sim 10^{14})$GeV for...
We present a new parametrization of the minimal seesaw model, expressing heavy-singlet neutrino Dirac Yukawa couplings ${(Y}_{\ensuremath{\nu}}{)}_{\mathrm{ij}}$ and Majorana masses ${M}_{{N}_{i}}$ in terms effective light-neutrino observables an auxiliary Hermitian matrix H. In supersymmetric version latter can be related directly to other low-energy observables, including processes that violate charged lepton flavor $\mathrm{CP}.$ This enables one respect stringent constraints on...
In this article we have calculated the spin-independent cross section of nucleon-dark matter scattering process at loop level, which is relevant to dark direct detection. Paying particular attention gluon with matter, contributes as leading order in perturbation, systematically evaluated diagrams tracking characteristic momentum dominates loops. Here whose typical scales are masses quarks and other heavier particles separately presented. Then, properly taken into account each contribution...
We reformulate the calculation of dark matter-nucleon scattering cross sections based on method effective field theories. assume that scatterings are induced by exchange colored mediators, and construct theories integrating out particles. All leading order matching conditions as well renormalization group equations presented. consider a Majorana fermion, real scalar vector bosons for matter show results each case. The treatment twist-2 operators is discussed in detail, it shown scale...
We complete the calculation of wino-nucleon scattering cross section up to next-to-leading order in α s . assume that other sparticles are decoupled and wino interacts with Standard Model particles via weak interaction. As a result, uncertainties coming from perturbative QCD significantly reduced be smaller than those nucleon matrix elements. The resultant is found larger leading-order one by about 70%, which well above neutrino background. In limit large mass spin-independent proton turns...
Dark matter (DM) simplified models are by now commonly used the ATLAS and CMS Collaborations to interpret searches for missing transverse energy (ETmiss). The coherent use of these sharpened LHC DM search program, especially in presentation its results their comparison direct-detection (DD) indirect-detection (ID) experiments. However, community has been aware limitations models, particular lack theoretical consistency some them restricted phenomenology leading relevance only a small subset...
The neutralino pair annihilation into two photons in our galactic halo gives a robust dark matter signal, since it would give quasi-monotonic gamma ray. This process is radiatively-induced, and the full-one loop calculation was done previously. However, for heavy wino-like or Higgsino-like neutralino, one-loop cross section violates unitarity, therefore higher-order corrections may be important. We construct non-relativistic theory chargino two-body states, estimate all-order QED two-loop by...
The lightest neutralino is a viable dark matter (DM) candidate. In this paper we study indirect detection of the wino-like DM using positrons and antiprotons from annihilation in galactic halo. When mass around 2 TeV, which favored thermal relic abundance, nonperturbation effect significantly enhances cross sections into antiprotons. We find that positron antiproton fluxes with energies larger than 100 GeV may become expected backgrounds. Since flux less sensitive to astrophysical...