Y. Teramoto
A5061048058- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Particle Accelerators and Free-Electron Lasers
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Medical Imaging Techniques and Applications
- Computational Physics and Python Applications
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- Superconducting Materials and Applications
- Advanced NMR Techniques and Applications
- Atomic and Molecular Physics
- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Muon and positron interactions and applications
- Particle accelerators and beam dynamics
- Radioactive Decay and Measurement Techniques
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum Information and Cryptography
- X-ray Spectroscopy and Fluorescence Analysis
- Physics of Superconductivity and Magnetism
- Chemical Reactions and Isotopes
Osaka City University
2009-2021
University of the Basque Country
2013-2016
University of Cincinnati
2001-2016
University of Giessen
2013-2016
University of Florida
1998-2016
Deutsches Elektronen-Synchrotron DESY
2016
University of Bonn
2013-2016
Pacific Northwest National Laboratory
2016
Aligarh Muslim University
2016
Nippon Dental University
2016
The Collins effect connects transverse quark spin with a measurable azimuthal asymmetry in the yield of hadronic fragments around quark's momentum vector. Using two different reconstruction methods we measure statistically significant asymmetries for charged pion pairs ${e}^{+}{e}^{\ensuremath{-}}$ annihilation at center-of-mass energies 10.52 GeV and 10.58 GeV, which can be attributed to fragmentation primordial quarks components. measurement was performed using data set $547\text{ }\text{...
Using 605 fb−1 of data collected at the Υ(4S) resonance we present a measurement inclusive radiative B-meson decay channel, B→Xsγ. For lower photon energy thresholds 1.7, 1.8, 1.9, and 2.0 GeV, as defined in rest frame B meson, measure partial branching fraction mean variance spectrum. At 1.7 GeV threshold obtain BF(B→Xsγ)=(3.45±0.15±0.40)×10−4, where errors are statistical systematic.Received 8 July 2009DOI:https://doi.org/10.1103/PhysRevLett.103.241801©2009 American Physical Society
The interference fragmentation function translates the of a quark with transverse projection spin into an azimuthal asymmetry two final-state hadrons. In e+e- annihilation product functions is measured. We report nonzero asymmetries for pairs charge-ordered pi+pi- pairs, which indicate significant in this channel. results are obtained from 672 fb-1 data sample that contains 711 \times 106 and was collected at near ?(4S) resonance, Belle detector KEKB asymmetric-energy collider.
The authors have detected 1203 events of the reaction ${\ensuremath{\pi}}^{\ensuremath{-}}p\ensuremath{\rightarrow}\ensuremath{\phi}\ensuremath{\phi}n$ at 22 GeV/c, and performed a partial-wave analysis $\ensuremath{\phi}\ensuremath{\phi}$ system. results are well represented by two resonances, both with quantum numbers ${I}^{G}={0}^{+}$, ${J}^{\mathrm{PC}}={2}^{++}$. breakdown Okubo-Zweig-Iizuka suppression observed in this is naturally explained context QCD if these states considered to be...
The differential cross section for the process $\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\rightarrow}\ensuremath{\eta}{\ensuremath{\pi}}^{0}$ has been measured in kinematic range $0.84\text{ }\text{ }\mathrm{GeV}<W<4.0\text{ }\mathrm{GeV}$, $|\mathrm{cos}{\ensuremath{\theta}}^{*}|<0.8$, where $W$ and ${\ensuremath{\theta}}^{*}$ are energy ${\ensuremath{\pi}}^{0}$ (or $\ensuremath{\eta}$) scattering angle, respectively, $\ensuremath{\gamma}\ensuremath{\gamma}$ center-of-mass system....
The differential cross sections for the process $\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}$ have been measured in kinematic range $0.6\text{ }\text{ }\mathrm{GeV}<W<4.1\text{ }\mathrm{GeV}$, $|\mathrm{cos}{\ensuremath{\theta}}^{*}|<0.8$ energy and pion scattering angle, respectively, $\ensuremath{\gamma}\ensuremath{\gamma}$ center-of-mass system. results are based on a $223\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data...
We report the first purely electroweak measurement of strengthening electromagnetic coupling, αQED with increasing momentum transfer Q2, by comparing process e+e−→μ+μ− e+e−→e+e−μ+μ−. The data were accumulated at an average center-of-mass energy ⟨√s⟩=57.77GeV using TOPAZ detector TRISTAN e+e− collider. measure α−1QED(Q2) to change from its known value α−1QED≅137.0 Q2=0to128.5±1.8(stat)±0.7(syst) Q2=(57.77GeV/c)2. This result agrees predictions.Received 20 March...
We present evidence for the existence of two new $I=0$ scalar mesons [${g}_{s}(1240)$ and ${S}^{*\ensuremath{'}}(1730)$] from an amplitude analysis reaction ${\ensuremath{\pi}}^{\ensuremath{-}}p\ensuremath{\rightarrow}{K}_{S}^{0}{K}_{S}^{0}n$ at 23 GeV/c. An examination mass splittings shows that neither these states can be easily assigned to a (near) ideally mixed ${J}^{\mathrm{PC}}={0}^{++}$ nonet. These results are in qualitative agreement with recent theoretical predictions glucon-glucon...
We report on a search for $CP$ violation in ${\ensuremath{\tau}}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{K}_{S}^{0}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\nu}}_{\ensuremath{\tau}}$ decays using data sample of $699\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected by the Belle experiment at KEKB electron-positron asymmetric-energy collider. The asymmetry is measured four bins invariant mass...
We report the first evidence for $X(3872)$ production in two-photon interactions by tagging either electron or positron final state, exploring highly virtual photon region. The search is performed ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{e}^{+}{e}^{\ensuremath{-}}J/\ensuremath{\psi}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, using $825\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of data collected Belle detector operated at KEKB ${e}^{+}{e}^{\ensuremath{-}}$...
We report preliminary results on the analysis of three-body Y(10860)=> B barB pi, Y(10860) => (B barB* + c.c.) pi and B* decays including an observation Zb(10610)+- pi-+ [B barB*+c.c]+- Zb(10650)+- [B* barB*]+- as intermediate channels. measure branching fractions to be Br(Y(10860)=> barB*+c.c.]+- pi-+)=(28.3+-2.9+-4.6)x10^{-3} pi-+)=(14.1+-1.9+-2.4)x10^{-3} set 90% C.L. upper limit barB]+- pi-+)<4.0x10^{-3}. also amplitude Y(10860)=>Y(nS)pi+pi-, n=1,2,3 internal structure...
We search for dimuon decays of a low mass particle in the ${B}^{0}\ensuremath{\rightarrow}{K}^{*0}X$ and ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\rho}}^{0}X$ using data sample $657\ifmmode\times\else\texttimes\fi{}{10}^{6}B\overline{B}$ events collected with Belle detector at KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. find no evidence such range from $212\text{ }\text{ }\mathrm{MeV}/{c}^{2}$ to $300\text{ lifetimes below ${10}^{\ensuremath{-}12}\text{ }\mathrm{s}$,...
We present a search for the decays B+→π+ℓ+ℓ− and B0→π0ℓ+ℓ−, where ℓ+ℓ− is either μ+μ− or e+e− pair, with data sample of 657×106 B¯¯¯B pairs collected Belle detector at KEKB collider. Signal events are reconstructed from charged neutral pion candidate pair oppositely electrons muons. No significant signal observed we set an upper limit on isospin-averaged branching fraction B(B→πℓ+ℓ−)<6.2×10−8 90% confidence level.Received 26 April 2008DOI:https://doi.org/10.1103/PhysRevD.78.011101©2008...
We report results on time-dependent $CP$ asymmetries in $B\ensuremath{\rightarrow}{D}^{*\ensuremath{\mp}}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ decays based a data sample containing $657\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ pairs collected with the Belle detector at KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider $\ensuremath{\Upsilon}(4S)$ resonance. use partial reconstruction technique, wherein signal events are identified using information...
We report the first measurement of time-dependent CP asymmetry in B(0)-->K(S)(0)rho(0)gamma decays based on 657 x 10(6) BB pairs collected with Belle detector at KEKB asymmetric-energy collider. measure CP-violating parameter S_{K_{S};{0}rho;{0}gamma}=0.11+/-0.33(stat)-0.09+0.05(syst) from a signal 212+/-17 events. also obtain effective direct A{eff}=0.05+/-0.18(stat)+/-0.06(syst) for mK(S)0pi+pi- <1.8 GeV/c(2) and 0.6 GeV/c(2)<m pi+pi- <0.9 GeV/c2.