A5101477745- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Black Holes and Theoretical Physics
- Neutrino Physics Research
- Cosmology and Gravitation Theories
- Dark Matter and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Particle Accelerators and Free-Electron Lasers
- Laser Design and Applications
- Superconducting Materials and Applications
- Computational Physics and Python Applications
- Laser-Plasma Interactions and Diagnostics
- Astrophysics and Cosmic Phenomena
- Gyrotron and Vacuum Electronics Research
- Particle accelerators and beam dynamics
- Nuclear Physics and Applications
- Distributed and Parallel Computing Systems
- Laser-Matter Interactions and Applications
- GaN-based semiconductor devices and materials
- International Science and Diplomacy
- Atomic and Molecular Physics
- Silicon Carbide Semiconductor Technologies
- Advanced X-ray Imaging Techniques
- Nuclear physics research studies
Osaka Institute of Technology
2023-2024
High Energy Accelerator Research Organization
2007-2019
Institute of Particle and Nuclear Studies
2001-2018
Hiroshima University
2015-2018
Nagoya Institute of Technology
2008-2017
Central Research Laboratories (United Kingdom)
2017
Parker Hannifin (United States)
2017
The Graduate University for Advanced Studies, SOKENDAI
2004-2015
Tokushima University
2005-2015
Nissan (United Kingdom)
1985-2011
This article reviews the current theoretical and experimental status of field muon decay its potential to search for new physics beyond standard model. The importance rare processes with lepton flavor violation is highly stressed, together precision measurements normal decay. Recent up-to-date motivations based on supersymmetric models, in particular grand unified theories, are described along other models. Future prospects experiments sources high intensity further progress this also discussed.
The coherent $\ensuremath{\mu}\ensuremath{-}e$ conversion rates in various nuclei are calculated for general lepton flavor violating interactions. We solve the Dirac equations numerically initial state muon and final electron Coulomb force, perform overlap integrations between wave functions nucleon densities. results indicate that branching ratio increases a light nucleus up to atomic number $Z\ensuremath{\sim}30,$ is largest $Z=30--60,$ becomes smaller heavy with $Z\ensuremath{\gtrsim}60.$...
The conclusions of the Physics Working Group international scoping study a future Neutrino Factory and super-beam facility (the ISS) are presented. ISS was carried by community between NuFact05, 7th International Workshop on Factories Superbeams, Laboratori Nazionali di Frascati, Rome, June 21-26, 2005) NuFact06 (Ivine, California, 24{30 August 2006). physics case for an extensive experimental programme to understand properties neutrino is presented role high-precision measurements...
We study new physics effects on the couplings of weak gauge bosons with lightest CP-even Higgs boson ($h$), $hZZ$, and tri-linear coupling boson, $hhh$, at one loop order, as predicted by two doublet model. Those renormalized constants can deviate from Standard Model (SM) predictions due to distinct origins; tree level mixing effect quantum additional particles in diagrams. The latter be enhanced $hhh$ constant when show non-decoupling property. Therefore, even case where $hZZ$ is close SM...
The present report documents the results of Working Group 2: B, D and K decays, workshop on Flavor in Era LHC, held at CERN from November 2005 through March 2007. With advent we will be able to probe New Physics (NP) up energy scales almost one order magnitude larger than it has been possible with accelerator facilities. While direct detection new particles main avenue establish presence NP indirect searches provide precious complementary information, since most probably not measure full...
We assess the model discriminating power of a combined phenomenological analysis mu -> e gamma and conversion on different target nuclei, including current hadronic uncertainties. find that theoretical uncertainties can be largely reduced by using input from lattice QCD do not constitute limiting factor in models where one or at most two underlying operators (dipole, scalar, vector) provide dominant source lepton flavor violation. Our results show realistic discrimination among mechanisms...
This work provides an overview on the current status of phenomenology and searches for heavy vector-like quarks, which are predicted in many models new physics beyond Standard Model. Searches at Tevatron LHC, here listed shortly described, have not found any evidence fermionic states (either chiral or vector-like) therefore posed strong bounds their masses: depending specific assumptions interactions observed final state, quarks with masses up to roughly 400–600 GeV been excluded by all...
We consider the phenomenology at Large Hadron Collider of new heavy vector-like quarks which couple mainly to third generation via Yukawa interactions, with special emphasis on non-standard doublet representations are less constrained from present data. also discuss in detail flavour limits tree level and loop implications a generalised CKM mixing matrix these cases.
We study an upper bound on masses of additional scalar bosons from the electroweak precision data and theoretical constraints such as perturbative unitarity vacuum stability in two Higgs doublet model taking account recent boson search results. If mass Standard-Model-like is rather heavy outside allowed region by data, a discrepancy should be compensated contributions bosons. show to about 2 $(1)$ TeV for 240 $(500)$ GeV.
We discuss a possible strategy for supersymmetry searches and studies at future linear ${\mathit{e}}^{+}$${\mathit{e}}^{\mathrm{\ensuremath{-}}}$ colliders. demonstrate their effectiveness by Monte Carlo analyses with full angular correlations under realistic experimental conditions including initial state radiation beamstrahlung effects. The importance of precision measurements parameters is emphasized. that the on mass can be as good 1% leptonic 3% hadronic final states. A detailed study...
We study Higgs boson pair production processes at future hadron and lepton colliders including the photon collision option in several new physics models; i.e., two-Higgs-doublet model, scalar leptoquark sequential fourth generation fermion model vector-like quark model. Cross sections for these can deviate significantly from standard predictions due to one-loop correction triple coupling constant. For induced such as $gg \to hh$ $\gamma\gamma\to hh$, where $h$ is (lightest) $g$ $\gamma$...
We study the phenomenology of new heavy vector-like fermions that couple to third generation quarks via Yukawa interactions, covering all allowed representations under standard model gauge groups. first review tree and loop level bounds on these states. then discuss decays loop-induced photon or gluon plus top. The main at are W b and/or Z Higgs top couplings. radiative turn out be quite close naive estimate: in cases, perturbative parameter space, branching ratios mildly sensitive couplings...
$\mu^{+} \to e^{+} \gamma$ and e^{+}e^{+}e^{-}$ processes are analyzed in detail with polarized muons supersymmetric grand unified theories. We first present Dalitz plot distribution for decay based on effective Lagrangian general lepton-flavor-violating couplings define various P- T-odd asymmetries. calculate branching ratios asymmetries SU(5) SO(10) models taking into account complex soft supersymmetry breaking terms. Imposing constraints from experimental bounds the electron, neutron...
Radiative corrections to Higgs masses are calculated in a supersymmetric standard model with an extra family and its mirror partners. These corrections, general, depend on the mass spectrum of fermions, bosons strength Yukawa couplings families. If we assume that do not blow up below GUT scale, upper bound lightest increases about 12 GeV. We also notice that, some cases, charged becomes lighter than tree level prediction.
Flavor changing neutral current processes such as $b \to s \gamma$, l^+ l^-$, \nu \bar{\nu}$, $\epsilon_K$, $\Delta m_B$, $K^+ \pi^+ \bar{\nu}$ and $\K_L \pi^0 are calculated in the supersymmetric standard model based on supergravity. We consider two assumptions for soft supersymmetry breaking terms. In minimal case terms all scalar fields taken to be universal at GUT scale whereas those different squark/slepton sector Higgs nonminimal case. calculation we have into account next-to-leading...
Motivated by the large mixing angle solutions for atmospheric and solar neutrino anomalies, flavor changing neutral current processes lepton violating as well muon anomalous magnetic moment are analyzed in framework of SU(5) supersymmetric grand unified theory (SUSY GUT) with right-handed neutrinos. In order to explain realistic mass relations quarks leptons, we take into account effects higher dimensional operators above GUT scale. It is shown that contributions $\mathrm{CP}$ violation...