A5074066830- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Particle Accelerators and Free-Electron Lasers
- Dark Matter and Cosmic Phenomena
- Medical Imaging Techniques and Applications
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- Superconducting Materials and Applications
- Advanced NMR Techniques and Applications
- Distributed and Parallel Computing Systems
- Gamma-ray bursts and supernovae
- Particle accelerators and beam dynamics
- Radiation Detection and Scintillator Technologies
- Advanced MRI Techniques and Applications
- Radioactive Decay and Measurement Techniques
- Atomic and Molecular Physics
- Neuroendocrine Tumor Research Advances
- Peptidase Inhibition and Analysis
- Advanced Chemical Physics Studies
- Cosmology and Gravitation Theories
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
2016-2024
National Research University Higher School of Economics
2020-2024
Moscow Institute of Physics and Technology
2014-2023
University of the Basque Country
2013-2022
University of Bonn
2016-2022
Duke University
2022
Campbell Collaboration
2012-2022
Chonnam National University
2018-2022
Institute of Physics and Technology
2013-2020
Beihang University
2016-2018
The Belle detector at the KEKB electron-positron collider has collected almost 1 billion Y(4S) events in its decade of operation. Super-KEKB, an upgrade is under construction, to increase luminosity by two orders magnitude during a three-year shutdown, with ultimate goal 8E35 /cm^2 /s luminosity. To exploit increased luminosity, been proposed. A new international collaboration Belle-II, being formed. Technical Design Report presents physics motivation, basic methods accelerator upgrade, as...
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{...
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.
In a previous paper we suggested an explanation for the peak designated as $Z(4430)^+$ in $ψ^\primeπ^+$ mass spectrum, observed by Belle ${\bar{\!B}} \to {ψ^\prime} π^+ K$ decays, effect of $\bar{\!D}{}^{\,*0}D^{\,+} ψ^\primeπ^+$ rescattering decays {D_{s}^{\,\prime -}} {D}$, where $D_{s}^{\,\prime -}$ is as-yet unobserved radial excitation pseudoscalar ground state $D_{s}^{\,-}$-meson. this paper, demonstrate that hypothesis provides double $Z^+$-like peaking structures, which were studied...
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...
Hypothetical particles with tiny electric charges (millicharged or MCPs) can be produced in electron-positron annihilation if kinematically allowed. Typical searches for them at $e^+e^-$ colliders exploit a signature of single photon missing energy carried away by the undetected MCP pair. We put forward an idea to look alternatively deposits inside tracker, which is direct observation. The new relevant non-relativistic MCPs, and we illustrate its power on example $c$-$\tau$ factory, where...
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 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.
The invariant mass spectrum of the ${\ensuremath{\eta}}^{\ensuremath{'}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ final state produced in two-photon collisions is obtained using a $673\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data sample collected vicinity $\ensuremath{\Upsilon}(4S)$ resonance with Belle detector at KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. We observe clear signal ${\ensuremath{\eta}}_{c}(1S)$ and measure its width to be...
We report a measurement of the time-integrated $CP$ asymmetry in neutral charm meson decay $D^0 \to K^0_S K^0_S$ using 921~fb$^{-1}$ data collected at $Υ(4S)$ and $Υ(5S)$ resonances with Belle detector KEKB asymmetric-energy $e^+e^-$ collider. The observed is $$ A_{CP}(D^0 K^0_S) = (-0.02 \pm 1.53 0.17) \%, where first uncertainty statistical second systematic. This latter dominated by error normalisation channel. result consistent Standard Model expectations improves respect to previous...