Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- The University of TokyoJP4.5k papers
- Yukawa Institute for Theoretical PhysicsJP2.7k papers
- The University of OsakaJP2.3k papers
- Nagoya UniversityJP2.2k papers
- High Energy Accelerator Research OrganizationJP2.2k papers
- Centre National de la Recherche ScientifiqueFR2.1k papers
- Tokyo Institute of TechnologyJP2k papers
- University of TsukubaJP1.7k papers
- Brookhaven National LaboratoryUS1.6k papers
- Stony Brook UniversityUS1.5k papers
- Waseda UniversityJP1.5k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR1.5k papers
39 papers · 2 filters
Democratic mass matrices induced by strong gauge dynamics and large mixing angles for leptons
Tatsuo Kobayashi, Hiroaki Shirano, Haruhiko Terao
We consider dynamical realization of the democratic type Yukawa coupling matrices as the Pendelton-Ross infrared fixed points.?Such fixed points of the Yukawa couplings become poss…
Role of Large Gluonic Excitation Energy for Narrow Width of Penta-Quark Baryons in QCD String Theory
Hideo Suganuma, Fumiko Okiharu, Toru T. Takahashi +1
We study the narrow decay width of low-lying penta-quark baryons in the QCD string theoryin terms of gluonic excitations. In the QCD string theory, the penta-quark baryon decays vi…
Narrow Width of Penta-Quark Baryons in QCD String Theory
Hideo Suganuma, Hiroko Ichie, Fumiko Okiharu +1
Using the QCD string theory, we investigate the physical reason of the narrow width of penta-quark baryons in terms of the large gluonic-excitation energy. In the QCD string theory…
Non-Perturbative Effect on Dark Matter Annihilation and Gamma Ray Signature from Galactic Center
Junji Hisano, Shigeki. Matsumoto, Mihoko M. Nojiri +1
Detection of gamma rays from dark matter annihilation in the galactic center is one of the feasible techniques to search for dark matter. We evaluate the gamma ray flux in the case…
How do chiral condensates affect color superconducting quark matter under charge neutrality constraints?
H. Abuki, M. Kitazawa, T. Kunihiro
We investigate the effects of the dynamical formation of the chiral condensates on color superconducting phases under the electric and color neutrality constraints at vanishing tem…
Large Mass Scale by Strong Gauge Dynamics with Infrared Fixed Point
Tatsuo Kobayashi, Hiroaki Nakano, Haruhiko Terao +1
We consider a mechanism for realizing the desired decoupling of strongly-coupled sector which is supposed to generate hierarchical structure of the Yukawa couplings. In our mechani…
Supersymmetry at the LHC and Beyond --Ultimate Targets--
Mihoko M. Nojiri
At the LHC, superpartners with the masses lighter than a few TeV may be found, and the masses of the supersymmetric (SUSY) particles and their interactions will be studied. The inf…
Effect of the smaller mass-squared difference for the long base-line neutrino experiments
Naotoshi Okamura
Usually, neutrino oscillation experiments are analyzed within the two-flavor framework which is governed by 1 mass-squared difference and 1 mixing angle. But there are 6 parameters…
Chiral symmetry and density wave in quark matter
E. Nakano, T. Tatsumi
A density wave in quark matter is discussed at finite temperature, which occurs along with the chiral condensation, and is described by a dual standing wave in scalar and pseudo-sc…
Higgs mass in the gauge-Higgs unification
Naoyuki Haba, Kazunori Takenaga, Toshifumi Yamashita
The gauge-Higgs unification theory identifies the zero mode of the extra dimensional component of the gauge field as the usual Higgs doublet. Since this degree of freedom is the Wi…
Mass and Cross-section Measurements of Chargino at Linear Colliders in Large tan(beta) Case
Yukihiro Kato, Keisuke Fujii, Teruki Kamon +2
The lighter chargino pair production () is one of key processes for determination of supersymmetric parameters at a linear collider. If…
Are black holes over-produced during preheating?
Teruaki Suyama, Takahiro Tanaka, Bruce Bassett +1
We provide a simple but robust argument that primordial black hole (PBH) production generically does {\em not} exceed astrophysical bounds during the resonant preheating phase afte…
Physics Interplay of the LHC and the ILC
LC Study Group, G. Weiglein, T. Barklow +120
Physics at the Large Hadron Collider (LHC) and the International e+e- Linear Collider (ILC) will be complementary in many respects, as has been demonstrated at previous generations…
A New SUSY mass reconstruction method at the CERN LHC
K. Kawagoe, M. M. Nojiri, G. Polesello
We propose a new mass reconstruction technique for SUSY processes at the LHC. The idea is to completely solve the kinematics of the SUSY cascade decay by using the assumption that…
Isospin quantum number of D_{s0}^+(2317)
Arata Hayashigaki, Kunihiko Terasaki
The D_s^+ pi^0 and D_s^{*+} gamma decays of the D_{s0}^+(2317) are studied by assigning it to various charmed strange scalar mesons. As a result, it is found that its assignment to…
A study of late decaying charged particles at future colliders
Koichi Hamaguchi, Yoshitaka Kuno, Tsuyoshi Nakaya +1
In models where the gravitino is the lightest supersymmetric particle (LSP), the next-to-lightest supersymmetric particle (NLSP) is long-lived. We consider an important charged NLS…
Radiative stabilization of warped space
Tatsuo Kobayashi, Koichi Yoshioka
Higher-dimensional field theory has been applied to explore various issues in recent particle physics such as the gauge hierarchy problem. In order for such approaches to be viable…
Searching for realistic 4d string models with a Pati-Salam symmetry -- Orbifold grand unified theories from heterotic string compactification on a Z6 orbifold
Tatsuo Kobayashi, Stuart Raby, Ren-Jie Zhang
Motivated by orbifold grand unified theories, we construct a class of three-family Pati-Salam models in a Z6 abelian symmetric orbifold with two discrete Wilson lines. These models…
Heavy Quarks on the Lattice
Shoji Hashimoto, Tetsuya Onogi
Lattice quantum chromodynamics provides first principles calculations for hadrons containing heavy quarks -- charm and bottom quarks. Their mass spectra, decay rates, and some hadr…
Direct Detection of the Wino- and Higgsino-like Neutralino Dark Matters at One-Loop Level
Junji Hisano, Shigeki Matsumoto, Mihoko M. Nojiri +1
The neutralino-nucleon (\tildeχ^0-N) scattering is an important process for direct dark matter searches. In this paper we discuss one-loop contributions to the cross section in the…
Study of the slepton non-universality at the CERN Large Hadron Collider
T. Goto, K. Kawagoe, M. M. Nojiri
In supersymmetric theory, the sfermion-fermion-gaugino interactions conserve the chirality of (s)fermions. The effect appears as the charge asymmetry in distributions at th…
Quark masses and mixing angles in heterotic orbifold models
Pyungwon Ko, Tatsuo Kobayashi, Jae-hyeon Park
We study systematically the possibility for realizing realistic values of quark mass ratios and and the mixing angle by using only renormalizable Yukaw…
Mass effects in the polarized virtual photon structure
Ken Sasaki, Tsuneo Uematsu
We discuss target mass effects in the polarized virtual photon structure functions , for the kinematic region , where $-Q^2…
Pentaquark Baryons in String Theory
Masako Bando, Taichiro Kugo, Akio Sugamoto +1
The recently observed pentaquark baryons and are studied in the dual gravity theory of QCD. By developing a general formulation useful for studying the branched st…