A. Sokolov
A5016507811- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Computational Physics and Python Applications
- Astrophysics and Cosmic Phenomena
- Medical Imaging Techniques and Applications
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Particle accelerators and beam dynamics
- Nuclear physics research studies
- Cosmology and Gravitation Theories
- Advanced NMR Techniques and Applications
- Muon and positron interactions and applications
- Physics of Superconductivity and Magnetism
- Radiation Detection and Scintillator Technologies
- Advanced Condensed Matter Physics
- Biotin and Related Studies
- Advancements in Photolithography Techniques
- Scientific Research and Discoveries
- Digital Radiography and Breast Imaging
Institute for High Energy Physics
2014-2024
Kurchatov Institute
2019-2024
Chonnam National University
2015-2022
University of the Basque Country
2013-2022
University of Bonn
2013-2022
Duke University
2022
Campbell Collaboration
2013-2022
Budker Institute of Nuclear Physics
2018
Siberian Branch of the Russian Academy of Sciences
2018
Novosibirsk State University
2018
We report the first observation of e+e−→Υ(1S)π+π−, Υ(2S)π+π−, and evidence for e+e−→Υ(3S)π+π−, Υ(1S)K+K−, near peak Υ(5S) resonance at s∼10.87 GeV. The results are based on a data sample 21.7 fb−1 collected with Belle detector KEKB e+e− collider. Attributing signals to resonance, partial widths Γ(Υ(5S)→Υ(1S)π+π−)=0.59±0.04(stat)±0.09(syst) MeV Γ(Υ(5S)→Υ(2S)π+π−)=0.85±0.07(stat)±0.16(syst) obtained from observed cross sections. These values exceed by more than 2 orders magnitude previously...
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....
This article describes a determination of the Cabibbo-Kobayashi-Maskawa matrix element $|{V}_{cb}|$ from decay ${B}^{0}\ensuremath{\rightarrow}{D}^{*\ensuremath{-}}{\ensuremath{\ell}}^{+}{\ensuremath{\nu}}_{\ensuremath{\ell}}$ using $711\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ Belle data collected near $\ensuremath{\Upsilon}(4S)$ resonance. We simultaneously measure product form factor normalization $\mathcal{F}(1)$ and as well three parameters ${\ensuremath{\rho}}^{2}$, ${R}_{1}(1)$...
The lifetime of the τ lepton is measured using process e+e−→τ+τ−, where both leptons decay to 3πντ. result for mean lifetime, based on 711 fb−1 data collected with Belle detector at Υ(4S) resonance and 60 MeV below, τ=(290.17±0.53(stat)±0.33(syst))×10−15 s. first measurement difference between τ+ τ− performed. upper limit relative positive negative |Δτ|/τ<7.0×10−3 90% C.L.Received 1 November 2013DOI:https://doi.org/10.1103/PhysRevLett.112.031801© 2014 American Physical Society
The mass of the τ lepton has been measured in decay mode τ→3πντ using a pseudomass technique. result obtained from 414 fb−1 data collected with Belle detector is Mτ=[1776.61±0.13(stat)±0.35(sys)] MeV/c2. upper limit on relative difference between positive and negative leptons |Mτ+−Mτ−|/Mτ<2.8×10−4 at 90% confidence level.Received 2 February 2007DOI:https://doi.org/10.1103/PhysRevLett.99.011801©2007 American Physical Society
We report a measurement of the exclusive ${B}^{+}$ meson decay to ${D}_{s}^{(*)\ensuremath{-}}{K}^{+}{\ensuremath{\pi}}^{+}$ final state using $657\ifmmode\times\else\texttimes\fi{}{10}^{6}B\overline{B}$ pairs collected at $\ensuremath{\Upsilon}(4S)$ resonance with Belle detector KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. use ${D}_{s}^{*\ensuremath{-}}\ensuremath{\rightarrow}{D}_{s}^{\ensuremath{-}}\ensuremath{\gamma}$ and...
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.
We present a measurement of the branching fraction and time-dependent CP violation parameters for B0 -> D*+ D*- Ks decays. also obtain an upper limit on product possible two-body decay, Ds1+(2536) D*-. These results are obtained from 414 fb-1 data sample that contains 449e10^6 BBbar pairs collected at Upsilon(4S) resonance with Belle detector KEKB asymmetric e+e- collider.
We study charmless B+ meson decays to the pΛ¯π+π− final state using a 605 fb−1 data sample collected at Υ(4S) resonance with Belle detector KEKB asymmetric-energy e+e− collider. There are significant signals found pΛ¯ mass peaking near threshold. The observed branching fraction for nonresonant B+→pΛ¯π+π− is (5.92−0.84+0.88(stat)±0.69(syst))×10−6 significance of 9.1 standard deviations. also observe intermediate three-body decay B+→pΛ¯ρ0 (4.78−0.64+0.67(stat)±0.60(syst))×10−6 and 9.5...
We report on a search for the X(1812) state in decay $B^{\pm} \to K^{\pm} \omega \phi$ with data sample of $657\times10^6$ $B\bar{B}$ pairs collected Belle detector at KEKB $e^+e^-$ collider. No significant signal is observed. An upper limit ${\cal B}(B^{\pm} X(1812),X(1812) \phi)<3.2\times 10^{-7}$ (90% C.L.) determined. also constrain three-body branching fraction to be \phi)$ $<$ 1.9 $\times 10^{-6}$ C.L.).
The cross sections for the reactions $e^+e^- \to \phi\eta, \quad \phi\eta', \rho\eta, \rho\eta'$ have been measured using a data sample of 516 fb$^{-1}$ collected with Belle detector at KEKB asymmetric-energy $e^+e^-$ collider. corresponding values are: $1.4 \pm 0.4 0.1$ fb $(\phi\eta)$, $5.3 1.1 0.4$ $(\phi\eta')$, $3.1 0.5 $(\rho\eta)$ and $3.3 0.6 0.2$ $(\rho\eta')$. energy dependence is presented measurements together those CLEO BaBar.