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Two-loop induced Majorana neutrino mass in a radiatively induced quark and lepton mass model
Nomura, Takaaki,Okada, Hiroshi American Physical Society 2016 Physical Review D Vol.94 No.9
<P>A two-loop induced radiative neutrino model is proposed as an extension of our previous work in which the first-and second-generation standard model fermion masses are generated at the one-loop level in both quark and lepton sectors. Then we discuss the current neutrino oscillation data, lepton flavor violations, muon anomalous magnetic moment, and a bosonic dark matter candidate, for both the normal and inverted neutrino mass hierarchy. Our numerical analysis shows that fewer hierarchical Yukawa coupling constants can fit the experimental data with TeV-scale dark matter.</P>
Radiative neutrino model with SU(2)L triplet fields
Nomura, Takaaki,Okada, Hiroshi,Orikasa, Yuta American Physical Society 2016 Physical Review D Vol.94 No.11
<P>We propose a loop-induced neutrino mass model, in which we introduce several exotic fermions and bosons with an SU(2)(L) multiplet, and discuss various phenomenologies such as lepton flavor violations, the muon anomalous magnetic moment, nonstandard interacting neutrinoless double beta decay, the relic density of dark matter, and the possibility of the spin-independent direct detection searches, imposing the constraints of oblique parameters. And we show a benchmark point to satisfy all the constraints and discuss our predictions.</P>
Neutrino mass with large SU(2)L multiplet fields
Nomura, Takaaki,Okada, Hiroshi American Physical Society 2017 Physical Review D Vol.96 No.9
<P>We propose an extension of the standard model introducing large SU(2)(L) multiplet fields which are quartet and septet scalars and quintet Majorana fermions. These multiplets can induce the neutrino masses via interactions with the SU(2) doublet leptons. We then find the neutrino masses are suppressed by a small vacuum expectation value of the quartet/septet and an inverse of the quintet fermion mass, relaxing the Yukawa hierarchies among the standard model fermions. We also discuss collider physics at the Large Hadron Collider, considering the production of charged particles in these multiplets, and due to the effects of violating the custodial symmetry, some specific signatures can be found. Then, we discuss the detectability of these signals.</P>
Nomura, Akihiro,Won, Hong-Hee,Khera, Amit V.,Takeuchi, Fumihiko,Ito, Kaoru,McCarthy, Shane,Emdin, Connor A.,Klarin, Derek,Natarajan, Pradeep,Zekavat, Seyedeh M.,Gupta, Namrata,Peloso, Gina M.,Borecki, Grune & Stratton 2017 Circulation research Vol.121 No.1
<P>Conclusions: Compared with noncarriers, carriers of PTV at CETP displayed higher high-density lipoprotein cholesterol, lower low-density lipoprotein cholesterol, lower triglycerides, and lower risk for CHD.</P>
Study of micro-plastics separation from sea water with electro-magnetic force
Nomura, Naoki,Mishima, Fumihito,Nishijima, Shigehiro The Korean Society of Superconductivity and Cryoge 2021 한국초전도저온공학회논문지 Vol.23 No.3
The method of removing micro-plastics from sea water has been developed using electro-magnetic force. Plastics are difficult to decompose and put a great load on the marine environment. Especially a plastic with a size of 5 mm or less is defined as micro-plastic and are carried by ocean currents over long distances, causing global pollution. These are not easily decomposed in the natural environment. The Lorentz force was generated in simulated sea water and its reaction force was applied to the micro-plastic to control their motion. Lorentz force was generated downward and the reaction force to the plastics was upward. The plastic used in the experiment was polystyrene with a diameter of 6 mm, and the density was 1.07 g/cm<sup>3</sup>. The polystyrene sphere levitated at the current density of 0.83 A/cm<sup>2</sup> and the external field of 0.87T. The particle trajectory calculation was also made to design separation system using superconducting magnet.
Recent progress of oxide-TFT-based inverter technology
Nomura Kenji 한국정보디스플레이학회 2021 Journal of information display Vol.22 No.4
Oxide semiconductor-based thin-film transistor (oxide-TFT) technology have gained significant attention since the innovation of n-channel oxide-TFT using ZnO and amorphous In–Ga–Zn–O (a-IGZO) channels because of their superior device properties including excellent electrical property such as high TFT mobility over >10 cm2/Vs and the low-cost manufacturability originating from the low-temperature processability. Already, n-channel a-IGZO-TFT is widely employed as a TFT pixel switching backplane for several high-performance active-matrix flat-panel displays, and oxide-TFT technology to date is well acknowledged as the best TFT technology for future device applications in the wide range area of electronics such as sensors, Internet of things (IoT), energy-harvesting, medical/bio-interface device, etc. Therefore, the development of large-scale circuit beyond discrete TFT device level becomes increasingly important and is vital to advance the next stage of oxide- TFT technology. In particular, developing oxide-TFT-based inverter device technology is the key for developing several digital and analog circuits. In this paper, the recent progress and challenges in oxide-TFT-based inverter technology, including unipolar NMOS, PMOS, CMOS, and CMOS-like inverters using ambipolar oxide-TFT, are reviewed.