A5049750407- Particle physics theoretical and experimental studies
- Black Holes and Theoretical Physics
- Quantum Chromodynamics and Particle Interactions
- Cosmology and Gravitation Theories
- Noncommutative and Quantum Gravity Theories
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Atomic and Subatomic Physics Research
- Quantum Electrodynamics and Casimir Effect
- Medical Imaging Techniques and Applications
- Wind and Air Flow Studies
- Particle Accelerators and Free-Electron Lasers
- Physics of Superconductivity and Magnetism
- Algebraic structures and combinatorial models
- Relativity and Gravitational Theory
- Particle Detector Development and Performance
- Nuclear physics research studies
- Fluid Dynamics and Vibration Analysis
- Theoretical and Computational Physics
- Quantum Mechanics and Applications
- Neutrino Physics Research
- Stochastic processes and statistical mechanics
- Nonlinear Waves and Solitons
- Superconducting Materials and Applications
National Center for Theoretical Sciences
2021-2025
National Taiwan University
2021-2025
National Center for Theoretical Sciences, Physics Division
2021-2025
Shinshu University
2023
Kyoto University
2013-2022
The University of Tokyo
1992-2014
RIKEN Nishina Center
2009-2013
Campbell Collaboration
2012
RIKEN
2002-2010
Chiba University
2002-2010
It is pointed out that the factorization of disconnected Wilson loop amplitudes implies a major reduction in dynamical degrees freedom large-$N$ limit lattice gauge theory; original model may be replaced by much simpler one ($d$ space-time dimensionality), $Z=\ensuremath{\Pi}\stackrel{}{\ensuremath{\mu}}[\ensuremath{\int} d...
We present a simple set of rules for constructing ultraviolet-finite closed-fermionic-string models. In particular, the method easily gives four-dimensional models which possess $N=1$ super-symmetry, chiral fermions, and phenomenologically interesting gauge groups.
We study the continuum Schwinger-Dyson equations for nonperturbative two-dimensional quantum gravity coupled to various matter fields. The one-matrix model are explicitly derived and turn out be a formal Virasoro condition on square root of partition function, which is conjectured τ function KdV hierarchy. Furthermore, we argue that general multi-matrix models related W algebras suitable reductions KP hierarchy its generalizations.
The observed value of the Higgs boson mass indicates that potential becomes small and flat at scale around ${10}^{17}\text{ }\text{ }\mathrm{GeV}$. Having this fact in mind, we reconsider inflation scenario proposed by Bezrukov Shaposhnikov. It turns out nonminimal coupling $\ensuremath{\xi}$ squared to Ricci scalar can be smaller than 10. For example, $\ensuremath{\xi}=7$ corresponds tensor-to-scalar ratio $r\ensuremath{\simeq}0.2$, which is consistent with recent observation BICEP2.
We report the first observation of B-->Dmacr;D(sJ)(2317) and B-->Dmacr;D(sJ)(2457) decays based on 123.8x10(6) BBmacr; events collected with Belle detector at KEKB. observe D(sJ)(2317) decay to D(s)pi(0) D(sJ)(2457) D(*)(s)pi(0) D(s)gamma final states. also set 90% C.L. upper limits for D(sJ)(2317)-->D(*)(s)gamma, D(sJ)(2457)-->D(*)(s)gamma, D(sJ)(2457)-->D(s)pi(0), D(sJ)(2457)-->D(s)pi(+)pi(-).
We report the first observation of two charmed strange baryons that decay into Lambda(c)(+)Kappa(-)pi(+). The broader states is measured to have a mass 2978.5+/-2.1+/-2.0 MeV/c2 and width 43.5+/-7.5+/-7.0 MeV/c2. narrow state are be 3076.7+/-0.9+/-0.5 MeV/c;{2} 6.2+/-1.2+/-0.8 MeV/c2, respectively. also perform search for isospin partner Lambda(c)(+)Kappa(0)/(s)pi(-) observe significant signal at 3082.8+/-1.8+/-1.5 data used this analysis were accumulated or near Upsilon(4S) resonance, using...
We derive a long distance effective action for space-time coordinates from IIB matrix model. It provides us an tool to study the structures of space-time. prove finiteness theory finite N all orders perturbation theory. Space-time is shown be inseparable, and its dimensionality dynamically determined. The model contains mechanism ensure vanishing cosmological constant which does not rely on manifest supersymmetry. discuss possible mechanisms obtain realistic gauge groups
We present an improved measurement of the standard model CP violation parameter $\mathrm{sin}2{\ensuremath{\varphi}}_{1}$ (also known as $\mathrm{sin}2\ensuremath{\beta})$ based on a sample $85\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ pairs collected at $\ensuremath{\Upsilon}(4S)$ resonance with Belle detector KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. One neutral B meson is reconstructed in $J/\ensuremath{\psi}{K}_{S}^{0},$...
We present an improved measurement of the branching fraction for electroweak penguin process $B\ensuremath{\rightarrow}{X}_{s}{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}}$, where $\ensuremath{\ell}$ is electron or a muon and ${X}_{s}$ hadronic system containing $s$-quark. The based on sample $152\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $\ensuremath{\Upsilon}(4S)\ensuremath{\rightarrow}B\overline{B}$ events collected with Belle detector at KEKB energy asymmetric...
We report a study of the processes ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}J/\ensuremath{\psi}{D}^{(*)}{\overline{D}}^{(*)}$. In $J/\ensuremath{\psi}{D}^{*}{\overline{D}}^{*}$ we observe significant enhancement in ${D}^{*}{\overline{D}}^{*}$ invariant mass spectrum, which interpret as new charmoniumlike state and denote $X(4160)$. The $X(4160)$ parameters are $M=({4156}_{\ensuremath{-}20}^{+25}\ifmmode\pm\else\textpm\fi{}15)\text{ }\text{ }\mathrm{MeV}/{c}^{2}$...
A classification of ten-dimensional closed-fermionic-string models with world-sheet superconformal invariance, modular and physical states proper space-time statistics is presented. This based on an analysis the spin structures Neveu-Schwarz-Ramond fermions fermionic variables used in representing internal-symmetry space.
The observed Higgs mass ${M}_{H}=125.9\ifmmode\pm\else\textpm\fi{}0.4\text{ }\text{ }\mathrm{GeV}$ leads to the criticality of standard model, that is, potential becomes flat around scale $1{0}^{17--18}\text{ for top 171.3 GeV. Earlier we proposed a inflation scenario in which this plays crucial role. In paper, investigate detailed cosmological predictions light latest Planck and BICEP2 results. We also consider portal scalar dark matter compute one-loop effective with two-loop...
We compute one- and two-loop quadratic divergent contributions to the bare Higgs mass in terms of couplings Standard Model. approximate couplings, defined at ultraviolet cutoff scale, by MS-bar ones same which are evaluated renormalization group equations for around 126GeV obtain scale dependence mass, examine where it becomes zero. find that when we take current central value top quark pole 173GeV, vanishes if is about 10^{23}GeV. With a 1.3 sigma smaller 170GeV, can be order Planck scale.