1.4k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Kyoto UniversityJP293 papers
- The University of TokyoJP282 papers
- High Energy Accelerator Research OrganizationJP232 papers
- Kobe UniversityJP228 papers
- Nagoya UniversityJP221 papers
- Stony Brook UniversityUS218 papers
- University of California, IrvineUS218 papers
- Boston UniversityUS217 papers
- Duke UniversityUS216 papers
- The University of OsakaJP214 papers
- TRIUMFCA211 papers
- Centre National de la Recherche ScientifiqueFR208 papers
24 papers · 1 filter
Directional Direct Detection of MeV Scale Boosted Dark Matter in Two Component Dark Matter Scenario via Dark Photon Interaction
Keiko I. Nagao, Tatsuhiro Naka, Takaaki Nomura
This study explores a two-component dark matter model in which one component, heavier dark matter, annihilates into a lighter dark matter. The lighter dark matter is expected to ge…
Uniform rate inflation on the brane
Chia-Min Lin, Rei Tamura, Keiko I. Nagao
We propose a model of uniform rate inflation on the brane. The potential is given by a hyperbolic cosine function plus a negative cosmological constant. The equation of motion is s…
Dynamical simulations of colliding superconducting strings
Takashi Hiramatsu, Marc Lilley, Daisuke Yamauchi
We study the collisions of elastic superconducting strings, also referred to as current-carrying strings, formed in a field-theory model…
Neutrinophilic DM annihilation in a model with gauge symmetry
Keiko I. Nagao, Takaaki Nomura, Hiroshi Okada +1
We propose a model with two different extra gauge symmetries; muon minus tauon symmetry and hidden symmetry . Then, we explain muon anomalous magn…
An alternative gauged symmetric model in light of the CDF II boson mass anomaly
Keiko I. Nagao, Takaaki Nomura, Hiroshi Okada
We consider an explanation of CDF II W bosom mass anomaly by mixing with gauge symmetry under which right-handed fermions are charged. It is found that is…
A model explaining the new CDF II W boson mass linking to muon and dark matter
Keiko I. Nagao, Takaaki Nomura, Hiroshi Okada
We propose a model to explain the W boson mass anomaly reported by the CDFII collaboration that would suggest new physics (NP). We introduce exotic fermions; one isospin doublet ve…
Generation of Twisted Gamma-Rays via Two-Photon Transition
Motomichi Tashiro, Noboru Sasao, Minoru Tanaka
We present a new and efficient method of generating twisted gamma rays utilizing highly accelerated helium-like ions; they are excited to a chosen state by irradiating two optical…
Alternative method of generating gamma rays with orbital angular momentum
Minoru Tanaka, Noboru Sasao
We propose a new method of generating gamma rays with orbital angular momentum (OAM). Accelerated partially-stripped ions are used as an energy up-converter. Irradiating an optical…
Neutrino and dark matter in a gauged symmetry
Keiko I. Nagao, Hiroshi Okada
We study neutrino and dark matter based on a gauged symmetry in a framework of radiative seesaw scenario. Identifying dark matter as a bosoninc particle, it interacts with…
Effective Lagrangian Approach to Top Decay via Flavor Changing Neutral Current
Zenro Hioki, Kazumasa Ohkuma, Akira Uejima
We study possible non-standard and couplings, which induce flavor-changing neutral-current decays of the top quark, in the effective-Lagrangian framework. The correspon…
Correlations in flavor-changing tqZ couplings constrained via experimental data
Zenro Hioki, Kazumasa Ohkuma, Akira Uejima
Possible non-standard tqZ couplings, where q=c or u, originated from general flavor-changing-neutral-current interactions are studied model-independently using the effective Lagran…
Studying flavor-changing neutral tqZ couplings: Current constraints and future prospects
Zenro Hioki, Kazumasa Ohkuma, Akira Uejima
Possible non-standard tuZ and tcZ interactions, which induce flavor-changing neutral-current decays of the top quark, are studied in the effective-Lagrangian framework. The corresp…
Generation of particle number asymmetry in expanding universe
Takuya Morozumi, Keiko I. Nagao, Apriadi Salim Adam +1
We study creation and time evolution of particle number asymmetry with nonequilibrium quantum field theory. We introduce a model of a neutral scalar and a complex scalar and it has…
Discrimination of anisotropy in dark matter velocity distribution with directional detectors
Keiko I. Nagao, Tomonori Ikeda, Ryota Yakabe +2
Directional detection of dark matter has sensitivity for both recoil energy and direction of nuclear recoil. It opens the way to measure local velocity distribution of dark matter.…
Constraints on generalized non-standard couplings
Zenro Hioki, Kazumasa Ohkuma, Akira Uejima
General non-standard couplings are studied as model independently as possible based on the effective Lagrangian consisting of the dimension-6 operators, which is an extension…
Refined analysis and updated constraints on general non-standard tbW couplings
Zenro Hioki, Kazumasa Ohkuma, Akira Uejima
We recently studied possible non-standard tbW couplings based on the effective-Lagrangian which consists of four kinds of SU(3) x SU(2) x U(1) invariant dimension-6 effective opera…
Full analysis of general non-standard tbW couplings
Zenro Hioki, Kazumasa Ohkuma
Possible non-standard couplings which could contribute to the t -> b W process are studied based on the effective-Lagrangian approach. The corresponding effective Lagrangian consis…
Final charged-lepton angular distribution and possible anomalous top-quark couplings in p p -> t tbar X -> l^+ X'
Zenro Hioki, Kazumasa Ohkuma
Possible anomalous (or nonstandard) top-quark interactions with the gluon and those with the W boson induced by SU(3) x SU(2) x U(1) gauge-invariant dimension-6 effective operators…
Anti-hyperon Polarization in and Collisions and Intrinsic Antidiquark State in Incident Baryon
Hujio Noda, Tsutomu Tashiro, Shin-ichi Nakariki
We discuss the relation between the polarization of inclusively produced (anti)-hyperons and the incident baryon states in the framework of the constituent quark-diquark cascade mo…
Inclusive electron spectrum in the region of pion production in electron-nucleus scattering and the effect of the quasi-elastic interaction
Hiroki Nakamura, Tadaaki Nasu, Makoto Sakuda +1
We have carried out a calculation of the inclusive electron scattering cross section off oxygen in the kinematical region corresponding to beam energies between 700 and 1200 MeV, w…
GR@PPA 2.7 event generator for / collisions
S. Tsuno, T. Kaneko, Y. Kurihara +2
The GR@PPA event generator has been updated to version 2.7. This distribution provides event generators for ( or ) + jets ( 4 jets), + jets ( 2 jets) and…
Introduction to GR@PPA event generators for pp/ppbar collisions
Soushi Tsuno
We have developed an extended framework, named GR@PPA, of the GRACE system for hadron collisions. The GRACE system is an automatic Feynman diagram calculation system and an event g…
Leading Effects in Hadroproductions of Lambda_c and D From Constituent Quark-Diquark Cascade Picture
Tsutomu Tashiro, Shin-ichi Nakariki, Hujio Noda +2
We discuss the hadroproductions of Lambda_c, Lambda_c bar, D and D bar in the framework of the constituent quark-diquark cascade model taking into account the valence quark annihil…
Charmed Hadron Production in πp and Kp Collisions and Leading Particle Effect by Constituent Quark-Diquark Cascade Model
T. Tashiro, H. Noda, S. Nakariki +2
We investigate the meson, baryon and anti-baryon productions in πp and Kp collisions in terms of a constituent cascade model which includes charm flavour. The constituent diquark i…