A5005965790- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Nuclear physics research studies
- Atomic and Subatomic Physics Research
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Atomic and Molecular Physics
- Black Holes and Theoretical Physics
- Particle Detector Development and Performance
- Scientific Research and Discoveries
- Nuclear Physics and Applications
- Quantum, superfluid, helium dynamics
- Advanced NMR Techniques and Applications
- Physics of Superconductivity and Magnetism
- Radioactive Decay and Measurement Techniques
- Magnetic Field Sensors Techniques
- Nuclear reactor physics and engineering
- Non-Destructive Testing Techniques
- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
- Noncommutative and Quantum Gravity Theories
- Computational Physics and Python Applications
- Quantum chaos and dynamical systems
- Algebraic and Geometric Analysis
Nagoya University
2012-2024
RIKEN Nishina Center
2012-2023
Kennesaw State University
2021-2022
Obayashi (Japan)
2012-2022
University of Massachusetts Amherst
2020-2021
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
2020-2021
University of Oslo
2021
European Organization for Nuclear Research
2021
Japan Atomic Energy Agency
2020-2021
Advanced Science Research Center
2020-2021
We calculate the scalar and tensor charges of nucleon in 2+1-flavor lattice QCD, for which systematics renormalization disconnected diagram is well controlled. Numerical simulations are performed at a single spacing = 0.11 fm. simulate four pion masses, cover range $m_\pi \sim$ 290 - 540 MeV, strange quark mass close to its physical value. The statistical accuracy improved by employing so-called low-mode averaging technique truncated solver method. study up, down, contributions calculating...
We reevaluate the electric dipole moment (EDM) of charged leptons in standard model using hadron effective models. find unexpectedly large EDM generated by level long-distance effect, ${d}_{e}=5.8\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}40}$, ${d}_{\ensuremath{\mu}}=1.4\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}38}$, and ${d}_{\ensuremath{\tau}}=\ensuremath{-}7.3\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}38}\text{ }\text{ }e\text{ }\mathrm{cm}$, with an...
We evaluate the electric dipole moment of charged leptons in standard model, where complex phase Cabibbo-Kobayashi-Maskawa matrix is only source CP violation. first prove that, at quark-gluon level, it suppressed by a factor $m_b^2 m_c^2 m_s^2$ all orders perturbation due to Glashow-Iliopoulos-Maiani mechanism. then calculate hadronic long distance contribution generated vector mesons one-loop level. The $|\Delta S|=1$ weak interaction derived using factorization, and strong modeled hidden...
A bstract We discuss cross sections for tW production in proton-proton collisions at the LHC and higher-energy colliders with energies of up to 100 TeV. find that, remarkably, soft-gluon corrections are numerically dominant even very high collider energies. present results approximate NNLO N 3 LO matched complete NLO results. These higher-order large need be included better theoretical accuracy smaller scale dependence. Total as well top-quark W -boson transverse-momentum rapidity...
We calculate for the first time electric dipole moment (EDM) of $^6$Li nucleus within alpha + p n three-body cluster model using Gaussian expansion method, assuming one meson exchange P, CP-odd nuclear forces. It is found that EDM 2 times more sensitive on isovector pion force than deuteron EDM, due to interaction between nucleons and cluster. The $^9$Be also calculated in same framework as an system. test ab initio calculation deuteron, $^3$H $^3$He nuclei realistic Argonne $v18$ force. In...
We calculate the scattering cross section between two $0^{++}$ glueballs in $SU(2)$ Yang-Mills theory on lattice at $\beta = 2.1, 2.2, 2.3, 2.4$, and 2.5 using indirect (HAL QCD) method. employ cluster-decomposition error reduction technique use all space-time symmetries to improve signal. In of HAL QCD method, centrifugal force was subtracted remove systematic effect due nonzero angular momenta discretization. From extracted interglueball potential we determine low energy glueball effective...
We calculate for the first time electric dipole moment (EDM) of deuteron, $^3$H, and $^3$He nuclei generated by one-meson exchange CP-odd nuclear force in standard model. The effective $|\Delta S| = 1$ four-quark operators are matched to model processes involving CP phase Cabibbo-Kobayashi-Maskawa matrix at electroweak scale run down hadronic $\mu GeV according renormalization group evolution next-to-leading logarithmic order. At scale, hadron elements modeled factorization approach. then...
We calculate for the first time scattering cross section between lightest glueballs in $SU(2)$ pure Yang-Mills theory, which are good candidates of dark matter. In step, we evaluate interglueball potential on lattice using HAL QCD method, with several spacings ($\beta = 2.1, 2.2, 2.3, 2.4$, and 2.5). The systematics associated nonzero angular momentum effect is removed by subtracting centrifugal force. statistical accuracy improved employing cluster-decomposition error reduction technique...
We study the Single-Parton-Scattering (SPS) production of double quarkonia (J/psi+J/psi, J/psi+Upsilon, and Upsilon+Upsilon) in pp pp(bar) collisions at LHC Tevatron as measured by CMS, ATLAS, LHCb, D0 experiments Colour-Evaporation Model (CEM), based on quark-hadron-duality, including Next-to-Leading Order (NLO) QCD corrections up to alpha_s^5. To do so, we also perform first true NLO --up alpha_s^4-- p_T-differential cross section for single-quarkonium production. This allows us fix...
We calculate the tensor charge of quark in QCD-like theory Landau gauge using Schwinger-Dyson formalism. It is found that dressed significantly suppressed against bare contribution, and result agrees qualitatively with analyses collinear factorization approach lattice QCD. also analyze confinement effect phenomenological strong coupling given by Richardson, find this contribution small. show suppression due to superposition spin flip arising from successive emission gluons which dress...
In this review, we summarize the theoretical development on electric dipole moment of light nuclei. We first describe nucleon level CP violation and its parametrization. then present results calculations EDM nuclei in ab initio approach cluster model. The analysis effect several models beyond standard model is presented, together with prospects for discovery. advantage focused point view many-body physics. evaluations nuclear generated by $\theta$-term phase Cabibbo-Kobayashi-Maskawa matrix...
We re-analyse the associated production of a prompt J/psi and W boson in pp collisions at LHC following results ATLAS Collaboration. perform first study Single-Parton-Scattering (SPS) contributions Next-to-Leading Order (NLO) alpha_s Colour-Evaporation Model (CEM), an approach based on quark-hadron-duality. Our provides clear indications for Double-Parton-Scattering (DPS) contributions, particular low transverse momenta, since our SPS CEM evaluation, which can be viewed as conservative upper...
We calculate the effect of $P$, $CP$-odd electron-nucleon interaction on electric dipole moment $^{199}\mathrm{Hg}$ atom by evaluating nuclear spin matrix elements in terms shell model. It is found that neutron element nucleus $⟨\mathrm{\ensuremath{\Psi}}|{\ensuremath{\sigma}}_{nz}|\mathrm{\ensuremath{\Psi}}⟩\ensuremath{\approx}\ensuremath{-}0.4$ with a dominant configuration ${p}_{1/2}$ orbital neutron. also derive constraints $CP$ phases Higgs-doublet models, supersymmetric and leptoquark...
We evaluate the contribution of $CP$-violating gluon chromo-electric dipole moment (the so-called Weinberg operator, denoted as $w$) to electric (EDM) nucleons in nonrelativistic quark model. The $CP$-odd interquark potential is modeled by perturbative one-loop level exchange generated operator with massive quarks and gluons. nucleon EDM obtained solving Schr\"odinger equation three-quark system using Gaussian expansion method. It found that resulting EDM, which may reasonably be considered...
The constraint on the $R$-parity violating supersymmetric interactions is discussed in light of current experimental data electric dipole moment neutron, $^{129}$Xe , $^{205}$Tl, and $^{199}$Hg atoms, YbF ThO molecules. To investigate constraints without relying upon assumption dominance a particular combination couplings over all rest, an extensive use made linear programming method scan parameter space. We give maximally possible values for EDMs proton, deuteron, $^3$He nucleus,...
We report theoretical results of the electric dipole moment (EDM) $^{210}$Fr which arises from interaction EDM an electron with internal field in atom and scalar-pseudoscalar electron-nucleus interaction; two dominant sources CP violation this atom. Employing relativistic coupled-cluster theory, we evaluate enhancement factors for these violating interactions to accuracy about 3% analyze contributions many-body effects. These quantities combination projected sensitivity experiment provide...
We study soft-gluon corrections for the associated production of a single top quark and Z boson (tqZ production) at hadron colliders. find that radiative are dominated by emission. derive an approximate NNLO (aNNLO) cross section adding second-order to exact NLO result. calculate aNNLO LHC energies, including uncertainties from scale dependence parton distributions. also differential distributions in top-quark rapidity. show significant they enhance while decreasing theoretical uncertainties.
We calculate the two-loop level electric and chromoelectric dipole moments of fermion involving fermion-sfermion inner loop, gaugino, Higgsino in minimal supersymmetric standard model, analyze moment with top-stop loop. It is found that this contribution comparable with, even dominates, some situations over Barr-Zee type diagram generated from $CP$ violation top squark sector TeV scale supersymmetry breaking.
We calculate the scalar, axial, and pseudoscalar charges of quark in Schwinger-Dyson formalism Landau gauge QCD. It is found that dressed quark-scalar density valence significantly enhanced against bare-quark contribution, result explains qualitatively phenomenologically known value pion-nucleon sigma term also given by lattice Moreover, we show Richardson's interquark potential suppresses Higashjima-Miransky approximation. This fact suggests an observable sensitive to confinement. For axial...
We calculate for the first time electric dipole moment (EDM) of $^{13}$C generated by isovector CP-odd pion exchange nuclear force in $\alpha$-cluster model, which describes well structures low lying states nucleus. The linear dependence EDM on neutron and coupling is found to be $d_{^{13}{\rm C}} = -0.33 d_n - 0.0020 \bar G_\pi^{(1)}$. enhancement factor smaller than that deuteron, due difference structure between $1/2^-_1$ state opposite parity ($1/2^+$) states. clarify role played EDM....
The cosmological scenario of the dark matter generated in hidden gauge theory based on grand unification is discussed. It found that stability halo our Galaxy and cosmic ray observation constrain, respectively, mass scale between standard model sectors. To obtain a phenomenologically consistent thermal evolution, entropy sector needs to be increased. We therefore propose where mini-inflation induced from potential coupled Standard sector, particular Higgs sector. This makes current density...