A5050424484- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Speech and dialogue systems
- Dark Matter and Cosmic Phenomena
- Topic Modeling
- Natural Language Processing Techniques
- Astrophysics and Cosmic Phenomena
- Multi-Agent Systems and Negotiation
- Social Robot Interaction and HRI
- Cosmology and Gravitation Theories
- Robotics and Automated Systems
- AI in Service Interactions
- Particle Detector Development and Performance
- Speech Recognition and Synthesis
- Language, Metaphor, and Cognition
- Radiomics and Machine Learning in Medical Imaging
- Radiology practices and education
- Black Holes and Theoretical Physics
- Language Development and Disorders
- Robotic Path Planning Algorithms
- Particle accelerators and beam dynamics
- Team Dynamics and Performance
- Sensor Technology and Measurement Systems
- Discourse Analysis and Cultural Communication
- Nanotechnology research and applications
NTT (Japan)
2014-2025
Toyama Prefectural University
2017-2019
University of Toyama
2008-2016
Kyoto Sangyo University
2013-2015
Ritsumeikan University
2009-2012
The University of Tokyo
2008-2012
University of Southampton
2011
High Energy Accelerator Research Organization
2004-2009
Scuola Internazionale Superiore di Studi Avanzati
2008-2009
University of Trieste
2009
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...
The possibility of measuring ${\mathrm{sin}}^{2}2{\ensuremath{\theta}}_{13}$ using reactor neutrinos is examined in detail. It shown that the sensitivity ${\mathrm{sin}}^{2}2{\ensuremath{\theta}}_{13}>0.02$ can be reached with 40 ton yr data by placing identical CHOOZ-like detectors at near and far distances from a giant nuclear power plant whose total thermal energy $24.3{\mathrm{GW}}_{\mathrm{th}}.$ emphasized this measurement free parameter degeneracies occur accelerator appearance...
Doubly charged Higgs bosons (${H}^{\ifmmode\pm\else\textpm\fi{}\ifmmode\pm\else\textpm\fi{}}$) are a distinctive signature of the triplet model neutrino mass generation. If ${H}^{\ifmmode\pm\else\textpm\fi{}\ifmmode\pm\else\textpm\fi{}}$ is relatively light (${m}_{{H}^{\ifmmode\pm\else\textpm\fi{}\ifmmode\pm\else\textpm\fi{}}}<400\text{ }\text{ }\mathrm{GeV}$), it will be produced copiously at LHC, which could enable precise measurements branching ratios decay channels...
Singly and doubly charged Higgs bosons in the triplet model mediate lepton flavor violating (LFV) decays $\ensuremath{\tau}\ensuremath{\rightarrow}\overline{l}ll$ $\ensuremath{\mu}\ensuremath{\rightarrow}e\ensuremath{\gamma}$. The decay rates are proportional to products of two Yukawa couplings (${h}_{ij}$) which can be expressed terms parameters neutrino mass matrix an unknown vacuum expectation value. We determine parameter space a signal for and/or...
The existence of doubly charged Higgs bosons (${H}^{\ifmmode\pm\else\textpm\fi{}\ifmmode\pm\else\textpm\fi{}}$) is a distinctive feature the triplet model (HTM), in which neutrinos obtain tree-level masses from vacuum expectation value neutral scalar representation $SU(2{)}_{L}$. We point out that large branching ratio for decay singly boson to via ${H}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{H}^{\ifmmode\pm\else\textpm\fi{}\ifmmode\pm\else\textpm\fi{}}{W}^{*}$ possible...
We show a TeV-scale seesaw model where Majorana neutrino masses, the dark matter mass, and stability of can be all originated from $U(1{)}_{\mathrm{B}\ensuremath{-}\mathrm{L}}$ gauge symmetry. Dirac mass terms for neutrinos are forbidden at tree level by $U(1{)}_{\mathrm{B}\ensuremath{-}\mathrm{L}}$, they induced one-loop spontaneous breaking. The right-handed naturally TeV scale or below because with loop suppression. Such would discovered CERN Large Hadron Collider. On other hand, is...
We investigate a model in which tiny neutrino masses are generated at the two-loop level by using scalar leptoquark and diquark multiplets. The can be singly produced LHC, it decay into pair of leptoquarks through lepton number violating interaction. Subsequent decays two provide clear signature violation, namely QCD jets same-signed charged leptons without missing energy. show that signal process is not suppressed while appropriately suppressed.
We propose a new model where the Dirac mass term for neutrinos, Majorana right-handed and other fermion masses arise via spontaneous breakdown of $\mathrm{U}(1{)}_{\mathrm{B}\ensuremath{-}\mathrm{L}}$ gauge symmetry. The anomaly-free condition gives four sets assignment $\mathrm{B}\ensuremath{-}\mathrm{L}$ charge to particles, three these have an associated global $\mathrm{U}(1{)}_{\mathrm{DM}}$ symmetry which stabilizes dark matter candidates. candidates contribute generating neutrinos at...
In recent years, several high-performance conversational systems have been proposed based on the Transformer encoder-decoder model. Although previous studies analyzed effects of model parameters and decoding method subjective dialogue evaluations with overall metrics, it is not enough how differences fine-tuning datasets affect user's detailed impressions. addition, Transformer-based approach has mostly verified for English, such languages as Japanese that large inter-language distances....
We extend the Higgs triplet model so as to include dark matter candidates and a simple suppression mechanism for vacuum expectation value (${v}_{\ensuremath{\Delta}}$) of scalar field. The smallness neutrino masses can be naturally explained with suppressed ${v}_{\ensuremath{\Delta}}$ even when fields are at TeV scale. sector is extended by introducing ${Z}_{2}$-odd scalars (an $\mathrm{SU}(2{)}_{L}$ doublet $\ensuremath{\eta}$ real singlet ${s}_{2}^{0}$) in addition ${Z}_{2}$-even complex...
We extend the scalar sector of neutrinophilic two-Higgs-doublet model, where small masses Dirac neutrinos are obtained via a vacuum expectation value vν SU(2)L-doublet field which has Yukawa interaction with only right-handed neutrinos. A global U(1)X symmetry is used for nature second and also eliminating Majorana mass terms By virtue an appropriate assignment U(1)X-charges to new particles, our model unbroken Z2 symmetry, under lightest Z2-odd boson can be dark matter candidate. In...
We point out the possibility that reactor measurement of theta_{13}, when combined with high-statistics nu_e appearance accelerator experiments, can detect leptonic CP violation. Our proposal is based on a careful statistical analysis under reasonable assumptions systematic errors, assuming 2 years running neutrino mode J-PARC -> Hyper-Kamiokande experiment and few 100 ton detectors at Kashiwazaki-Kariwa nuclear power plant. show method be arranged to insensitive intrinsic parameter...
If the lepton mixing angle ${\ensuremath{\theta}}_{23}$ is not maximal, there arises a problem of ambiguity in determining due to existence two degenerate solutions, one first and other second octant. We discuss an experimental strategy for resolving octant degeneracy by combining reactor measurement ${\ensuremath{\theta}}_{13}$ with accelerator ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ disappearance ${\ensuremath{\nu}}_{e}$ appearance experiments. The robustness difficulty lifting it only...
We discuss the phenomenology of doubly and singly charged Higgs bosons [of $SU(2{)}_{L}$-triplet fields] in simplest ${A}_{4}$-symmetric version triplet model. Mass eigenstates these are obtained explicitly from potential. It is shown that their decays into a pair leptons have unique flavor structures which can be tested at LHC if some masses below TeV scale. Sizable decay rates for $\ensuremath{\tau}\ensuremath{\rightarrow}\overline{\ensuremath{\mu}}ee$...
The neutral triplet scalars (${H}^{0}$, ${A}^{0}$) in the Higgs model are difficult to detect at LHC for case of mass degeneracy with singly charged (${H}^{\ifmmode\pm\else\textpm\fi{}}$) and doubly (${H}^{\ifmmode\pm\else\textpm\fi{}\ifmmode\pm\else\textpm\fi{}}$) scalars. A nonzero value a specific quartic coupling scalar potential removes this degeneracy, positive values would give rise hierarchy...
The doubly charged scalar boson (H^{\pm\pm}) is introduced in several models of the new physics beyond standard model. H^{\pm\pm} has Yukawa interactions with two left-handed leptons or right-handed depending on models. We study kinematical properties decay products through tau order to discriminate chiral structures interaction. chirality can be measured by energy distributions products, and thus structure interaction traced invariant-mass products. perform simulation studies for typical...
We examine accuracy of theta_{23} determination in future long-baseline (LBL) nu_{mu} disappearance experiments the three-flavor mixing scheme neutrinos. Despite that error sin^2{2theta_{23}} is indeed a few % level at around maximal mixing, we show physics variable s^2_{23} large, delta(s^2_{23})/s^2_{23} \simeq 10-20%, depending upon regions theta_{23}. The errors are severely affected by octant degeneracy theta_{23}, and delta(s^2_{23}) largely amplified Jacobian factor relating these two...
The connection between the neutrinoless double beta [$(\ensuremath{\beta}\ensuremath{\beta}{)}_{0\ensuremath{\nu}}$] decay effective Majorana mass $|{M}_{ee}|$, and branching ratios of decays ${H}^{\ifmmode\pm\else\textpm\fi{}\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{l}^{\ifmmode\pm\else\textpm\fi{}}{l}^{\ensuremath{'}\ifmmode\pm\else\textpm\fi{}}$, $l$, ${l}^{\ensuremath{'}}=e$, $\ensuremath{\mu}$, doubly charged Higgs boson...