A5082636711- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- High-Energy Particle Collisions Research
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Medical Imaging Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Computational Physics and Python Applications
- Black Holes and Theoretical Physics
- Superconducting Materials and Applications
- Nuclear physics research studies
- Particle accelerators and beam dynamics
- Nuclear Physics and Applications
- Electronic Packaging and Soldering Technologies
- 3D IC and TSV technologies
- Gamma-ray bursts and supernovae
- Thin-Film Transistor Technologies
- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Electromagnetic Compatibility and Noise Suppression
- Viral gastroenteritis research and epidemiology
- Electromagnetic Compatibility and Measurements
The University of Tokyo
2005-2024
University of Tsukuba
1999-2024
High Energy Accelerator Research Organization
2013-2022
Nagoya University
2007-2022
The Graduate University for Advanced Studies, SOKENDAI
2020-2021
Osaka University
2001-2020
SLAC National Accelerator Laboratory
2014
Stanford University
2014
Shinko Electric Industries (Japan)
2013
Institute of Particle and Nuclear Studies
2013
We report the first measurement of $\ensuremath{\tau}$ lepton polarization ${P}_{\ensuremath{\tau}}({D}^{*})$ in decay $\overline{B}\ensuremath{\rightarrow}{D}^{*}{\ensuremath{\tau}}^{\ensuremath{-}}{\overline{\ensuremath{\nu}}}_{\ensuremath{\tau}}$ as well a new ratio branching fractions...
We report a measurement of the ratio ${\cal R}(D^*) = {\cal B}(\bar{B}^0 \rightarrow D^{*+} \tau^- \bar{\nu}_{\tau})/{\cal \ell^- \bar{\nu}_{\ell})$, where $\ell$ denotes an electron or muon. The results are based on data sample containing $772\times10^6$ $B\bar{B}$ pairs recorded at $\Upsilon(4S)$ resonance with Belle detector KEKB $e^+ e^-$ collider. select $B^0 \bar{B}^0$ by reconstructing both $B$ mesons in semileptonic decays to $D^{*\mp} \ell^{\pm}$. measure R}(D^*)= 0.302 \pm...
We present a precise measurement of the CP violation parameter sin2phi_1 and direct A_f using final data sample 772x10^6 B\bar B pairs collected at Upsilon(4S) resonance with Belle detector KEKB asymmetric-energy e+e- collider. One neutral meson is reconstructed in J/psi K0S, psi(2S) chi_c1 K0S or K0L CP-eigenstate its flavor identified from decay products accompanying meson. From distribution proper time intervals between two decays, we obtain following parameters:...
We recently reported that lactoferrin (LF), a milk protein belonging to the iron transporter family, inhibits hepatitis C virus (HCV) infection in cultured human hepatocytes (PH5CH8) and interaction of LF with HCV is responsible for this inhibitory effect. As PH5CH8 cells were found be hepatocyte line susceptible B (HBV) infection, we therefore examined if could effectively prevent HBV cells. Preincubation cell bovine (bLF) or (hLF) was required cells, preincubation bLF hLF had no effect on...
We report the observation of decay mode ${B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}p\overline{p}{K}^{\ifmmode\pm\else\textpm\fi{}}$ based on an analysis $29.4{\mathrm{fb}}^{\ensuremath{-}1}$ data collected by Belle detector at KEKB. This is first example a $b\ensuremath{\rightarrow}s$ transition with baryons in final state. The $p\overline{p}$ mass spectrum this inconsistent phase space and peaked low mass. branching fraction for measured to be...
We present a measurement of the standard model CP violation parameter sin2 phi(1) (also known as sin2beta) based on 10.5 fb(-1) data sample collected at Upsilon(4S) resonance with Belle detector KEKB asymmetric e(+)e(-) collider. One neutral B meson is reconstructed in J/psiK(S), psi(2S)K(S), chi(c1)K(S), eta(c)K(S), J/psiK(L), or J/psipi(0) CP-eigenstate decay channel and flavor accompanying identified from its charged particle products. From asymmetry distribution time interval between two...
Abstract We report on new flavor tagging algorithms developed to determine the quark-flavor content of bottom ( "Image missing"<!-- image only, no MathML or LaTex -->) mesons at Belle II. The provide essential inputs for measurements mixing and charge-parity violation. validate evaluate performance using hadronic --> decays with flavor-specific final states reconstructed in a data set corresponding an integrated luminosity 62.8 fb $$^{-1}$$ <mml:math...
We report on a study of three-body charmless decays B+→K+h+h− based 29.1fb−1 data sample collected with the Belle detector. With no assumptions intermediate mechanisms, following branching fractions have been measured for first time: B(B+→K+π−π+)=(55.6±5.8±7.7)×10−6 and B(B+→K+K−K+)=(35.3±3.7±4.5)×10−6. present observation decay B+→f0(980)K+ fraction product B(B+→f0(980)K+)×B(f0(980)→π+π−)=(9.6+2.5+1.5+3.4−2.3−1.5−0.8)×10−6. This is reported example B meson to scalar pseudoscalar final...
The production of strip sensors for the ATLAS Inner Tracker (ITk) started in 2021. Since then, a Quality Assurance (QA) program has been carried out continuously, by using specific test structures, parallel to Control (QC) inspection sensors. QA consists monitoring sensor-specific characteristics and technological process variability, before after irradiation with gammas, neutrons, protons. After two years, half full volume reached we present an analysis parameters measured as part process....
In order to achieve high speed transmission and large volume data processing, size silicon-interposer has been required. Warpage caused by the CTE mismatch between a an organic substrate is most significant problem. this study, we investigated several warpage control techniques for 2.5D package assembly process. First was process sequence. One called "chip first process" that is, chips are mounted on Si-interposer at first. The other last last. chip successfully processed using conventional...
We report a search for the flavor-changing neutral current decay B-->K(*)l+l- using 29.1 fb(-1) data sample accumulated at Upsilon(4S) resonance with Belle detector KEKB e+e- storage ring. observe process B-->Kl+l-(l = e, mu), first time, branching fraction of B(B-->Kl+l-) (0.75(+0.25)(-0.21)+/-0.09)x10(-6).
We have measured the branching fraction B, longitudinal polarization fL, and CP asymmetry coefficients A S for B0→ρ+ρ− decays with Belle detector at KEKB e+e− collider using 253 fb−1 of data. obtain B=[22.8±3.8(stat)+2.3−2.6(syst)]×10−6, fL=0.941+0.034−0.040(stat)±0.030(syst), A=0.00±0.30(stat)±0.09(syst), S=0.08±0.41(stat)±0.09(syst). These values are used to constrain Cabibbo-Kobayashi-Maskawa phase ϕ2; solution consistent standard model is ϕ2=(88±17)° or 59°<ϕ2<115° 90% C.L.Received 11...
The ATLAS experiment will replace its existing Inner Detector with the new all-silicon Tracker (ITk) to cope operating conditions of forthcoming high-luminosity phase LHC (HL-LHC). outer regions ITk be instrumented ∼18000 ATLAS18 strip sensors fabricated by Hamamatsu Photonics K.K. (HPK). With launch full-scale sensor production in 2021, community has undertaken quality control (QC) testing these ensure compliance mechanical and electrical specifications agreed HPK. is conducted at seven QC...
We report the first observation of color-suppressed B( 0)-->D(0)pi(0), D(*0)pi(0), D0eta, and D0omega decays, evidence for 0)-->D(*0)eta D(*0)omega. The branching fractions are B(B( 0)-->D0pi(0)) = (3.1 +/- 0.4 0.5)x10(-4), 0) -->D(*0)pi(0)) (2.7(+0.8+0.5)(-0.7-0.6))x10(-4), --> D0eta) (1.4(+0.5)(-0.4) 0.3)x10(-4), D0omega) (1.8 0.5(+0.4)(-0.3))x10(-4), we set 90% confidence level upper limits D(*0)eta)<4.6 x 10(-4) 0)-->D(*0)omega)<7.9 10(-4). analysis is based on a data sample 21.3 fb(-1)...
We present measurements of the Cabibbo-suppressed decays Lambda_c^+ --> Lambda0 K+ and Sigma0 (both first observations), Sigma+ pi- (seen with large statistics for time), p K- phi (measured improved accuracy). Improved branching ratio phi, which are attributed to W-exchange diagrams, shown. also evidence Xi(1690)^0 set an upper limit on non-resonant decay K-. This analysis was performed using 32.6 fb^{-1} data collected by Belle detector at asymmetric e+ e- collider KEKB.
We present the results of a time-dependent Dalitz plot analysis ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$ decays based on $414\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data sample that contains $449\ifmmode\times\else\texttimes\fi{}{10}^{6}B\overline{B}$ pairs. The were collected $\ensuremath{\Upsilon}(4S)$ resonance with Belle detector at KEKB asymmetric energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. Combining our...