Э. А. Кравченко
A5048009548- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Ancient Mediterranean Archaeology and History
- Ancient and Medieval Archaeology Studies
- Neutrino Physics Research
- Particle Accelerators and Free-Electron Lasers
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Diverse Scientific Research in Ukraine
- Historical, Religious, and Philosophical Studies
- Discourse Analysis and Cultural Communication
- Marine and environmental studies
- Nuclear physics research studies
- Literature, Language, and Rhetoric Studies
- Education and Social Development in Ukraine
- Byzantine Studies and History
- Education, Literature, Philosophy Research
- Eastern European Communism and Reforms
- Language, Communication, and Linguistic Studies
- Eurasian Exchange Networks
- Radiation Therapy and Dosimetry
- Atomic and Subatomic Physics Research
- Nuclear reactor physics and engineering
- Cosmology and Gravitation Theories
National Academy of Sciences of Ukraine
2020-2023
Budker Institute of Nuclear Physics
2005-2020
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2020
University of Bologna
2020
University of California, Irvine
2020
University of Sassari
2020
Siberian Branch of the Russian Academy of Sciences
2014-2019
Novosibirsk State University
2014-2019
Institute of Archaeology
2019
Laboratoire d’Annecy de Physique des Particules
2004-2005
Many models of physics beyond the Standard Model predict existence new Abelian forces with gauge bosons mediating interactions between "dark sectors" and Model. We report a search for dark boson Z' coupling only to second third generations leptons in reaction e+e- -> mu+mu- Z', using 514 fb-1 data collected by BABAR experiment. No significant signal is observed masses range 0.212 - 10 GeV. Limits on parameter g' as low 7x10^-4 are derived, leading improvements bounds compared those...
A precise measurement of the cross section process $e^+e^-\toπ^+π^-(γ)$ from threshold to an energy 3GeV is obtained with initial-state radiation (ISR) method using 232fb$^{-1}$ data collected BaBar detector at $e^+e^-$ center-of-mass energies near 10.6GeV. The ISR luminosity determined a study leptonic $e^+e^-\toμ^+μ^-(γ)γ_{\rm ISR}$, which found agree next-to-leading-order QED prediction within 1.1%. for systematic uncertainty 0.5% in dominant $ρ$ resonance region. leading-order hadronic...
We present measurements of Collins asymmetries in the inclusive process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\pi}\ensuremath{\pi}X$, where $\ensuremath{\pi}$ stands for charged pions, at a center-of-mass energy 10.6 GeV. use data sample $468\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected by BABAR experiment PEP-II $B$ factory SLAC, and consider pairs pions produced opposite hemispheres hadronic events. observe clear distributions azimuthal angles two...
We study the lepton forward-backward asymmetry ${\mathcal{A}}_{FB}$ and longitudinal ${K}^{*}$ polarization ${F}_{L}$, as well an observable ${P}_{2}$ derived from them, in rare decays $B\ensuremath{\rightarrow}{K}^{*}{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}}$, where ${\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}}$ is either ${e}^{+}{e}^{\ensuremath{-}}$ or ${\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$, using full sample of 471 million...
We perform a Dalitz plot analysis of about 100,000 Ds+ decays to K+ K- pi+ and measure the complex amplitudes intermediate resonances which contribute this decay mode. also relative branching fractions --> pi- K-. For we use 384 fb-1 data sample, recorded by BABAR detector at PEP-II asymmetric-energy e+e- collider running center-of-mass energies near 10.58 GeV.
We present measurements of the branching fractions and charge asymmetries (where appropriate) two-body B decays to ${\ensuremath{\eta}}^{(\ensuremath{'})}{K}^{*},$ ${\ensuremath{\eta}}^{(\ensuremath{'})}\ensuremath{\rho},$ ${\ensuremath{\eta}}^{(\ensuremath{'})}{\ensuremath{\pi}}^{0},$ $\ensuremath{\omega}{\ensuremath{\pi}}^{0},$ $\ensuremath{\varphi}{\ensuremath{\pi}}^{0}.$ The data were recorded with BABAR detector at PEP-II correspond $89\ifmmode\times\else\texttimes\fi{}{10}^{6}$...
We present measurements of the inclusive production antideuterons in $e^+e^-$ annihilation into hadrons at $\approx 10.58 \mathrm{\,Ge\kern -0.1em V}$ center-of-mass energy and $\Upsilon(1S,2S,3S)$ decays. The results are obtained using data collected by BABAR detector PEP-II electron-positron collider. Assuming a fireball spectral shape for emitted antideuteron momentum, we find $\mathcal{B}(\Upsilon(1S) \to \bar{d}X) = (2.81 \pm 0.49 \mathrm{(stat)} {}^{+0.20}_{-0.24} \mathrm{(syst)})/!...
Based on the full BABAR data sample of 466.5 million $B\overline{B}$ pairs, we present measurements electron spectrum from semileptonic $B$ meson decays. We fit inclusive to distinguish Cabibbo-Kobayashi-Maskawa (CKM) suppressed $B\ensuremath{\rightarrow}{X}_{u}e\ensuremath{\nu}$ decays CKM-favored $B\ensuremath{\rightarrow}{X}_{c}e\ensuremath{\nu}$ decays, and various other backgrounds, determine total branching fraction...
We report the observation of $823\ifmmode\pm\else\textpm\fi{}57$ ${B}^{0}$ and $970\ifmmode\pm\else\textpm\fi{}65$ ${B}^{+}$ decays to doubly charmed final states ${D}^{(*)}{D}^{(*)}K,$ where ${D}^{(*)}$ are fully reconstructed K is either a ${K}^{\ifmmode\pm\else\textpm\fi{}}$ or ${K}^{0}.$ use sample $82.3\ifmmode\pm\else\textpm\fi{}0.9$ million $B\overline{B}$ events collected between 1999 2002 with BABAR detector at PEP-II storage ring Stanford Linear Accelerator Center. The 22 possible...
Using a sample of (470.9 +- 2.8) x 10^6 BB-bar pairs, we measure the decay branching fraction B(B^0 -> D^*- pi^+ pi^- pi^+) = (7.26 0.11 0.31) 10^-3, where first uncertainty is statistical and second systematic. Our measurement will be helpful in studies lepton universality by measuring tau^+ nu_tau) using nu-bar_tau decays, normalized to pi^+.
We present measurements of the branching fraction and time-dependent CP-violating asymmetries in B0-->K0(S)K0(S)K0(S) decays based on 227 x 10(6) Upsilon4S-->BB collected with BABAR detector at PEP-II asymmetric-energy B factory SLAC. obtain a (6.9(+0.9)(-0.8)+/-0.6) 10(-6), CP C=-0.34(+0.28)(-0.25)+/-0.05 S=-0.71(+0.38)(-0.32)+/-0.04, where first uncertainties are statistical second systematic.
We present a search for nine lepton-number-violating and three lepton-flavor-violating neutral charm decays of the type D0→h'−h−ℓ'+ℓ+ D0→h'−h+ℓ'±ℓ∓, where h h′ represent K or π meson ℓ ℓ′ an electron muon. The analysis is based on 468 fb−1 e+e− annihilation data collected at close to Υ(4S) resonance with BABAR detector SLAC National Accelerator Laboratory. No significant signal observed any twelve modes, we establish 90% confidence level upper limits branching fractions in range...
We report on the search for rare decays B+→D(*)+K0S in approximately 226×106 Υ(4S)→B¯¯¯B collected with BABAR detector at PEP-II asymmetric-energy B factory SLAC. do not observe any significant signal and we set 90% confidence-level upper limits branching fractions, B(B+→D+K0)<0.5×10−5 B(B+→D*+K0)<0.9×10−5.Received 31 May 2005DOI:https://doi.org/10.1103/PhysRevD.72.011102©2005 American Physical Society
A search for the rare flavor-changing neutral current process ${B}^{\ensuremath{-}}\ensuremath{\rightarrow}\mathrm{\ensuremath{\Lambda}}\overline{p}\ensuremath{\nu}\overline{\ensuremath{\nu}}$ using data from BABAR experiment has been performed. total of $424\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ ${e}^{+}{e}^{\ensuremath{-}}$ collision collected at center-of-mass energy $\mathrm{\ensuremath{\Upsilon}}(4S)$ resonance is used in this study, corresponding to a sample...
A search is presented for the four-body decay ${B}^{0}\ensuremath{\rightarrow}pp\overline{p}\overline{p}$ in a sample of 471 million $B\overline{B}$ pairs collected with BABAR detector, operated at SLAC PEP-II asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. The center-of-mass energy 10.58 GeV. From fit to distribution energy-substituted mass ${m}_{\mathrm{ES}}$, branching fraction...
We report the observation of baryonic decay ${\overline{B}}^{0}\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Lambda}}}_{c}^{+}\overline{p}{K}^{\ensuremath{-}}{K}^{+}$ using a data sample $471\ifmmode\times\else\texttimes\fi{}1{0}^{6}$ $B\overline{B}$ pairs produced in ${e}^{+}{e}^{\ensuremath{-}}$ annihilations at $\sqrt{s}=10.58\text{ }\text{ }\mathrm{GeV}$. This was recorded with BABAR detector PEP-II storage ring SLAC. find...
The Institute of Archaeology the National Academy Sciences Ukraine has published Olena Fialko’s book Amazons: Myths and Reality. Actually, it is a publication author’s thesis for degree Doctor Historical Sciences, which she successfully defended in 2020 at Kyiv.
The article deals with archaeological, anthropological and archaeozoological material of the one foothill cemetery in Crimea. One most interesting historical periods is Late Scythian development Crimean Scythia. This subject research on materials from Prehistoric Expedition Institute Archeology Academy Sciences Ukrainian Republic (Kyiv) 1956-1957 by А.M. Leskov. comprises excavations Japallah burial mound north Mountains, which have not yet been completely analyzed. presence traditional...
We measure the mass difference, Δm_{+}, between D^{*}(2010)^{+} and D^{+} using decay chain D^{*}(2010)^{+}→D^{+}π^{0} with D^{+}→K^{-}π^{+}π^{+}. The data were recorded BABAR detector at center-of-mass energies near ϒ(4S) resonance, correspond to an integrated luminosity of approximately 468 fb^{-1}. Δm_{+}=(140 601.0±6.8[stat]±12.9[syst]) keV. combine this result a previous measurement Δm_{0}≡m(D^{*}(2010)^{+})-m(D^{0}) obtain Δm_{D}=m(D^{+})-m(D^{0})=(4824.9±6.8[stat]±12.9[syst]) These...
Pottery of Uch-Bash settlement (the end the 12th — beginning 7th century BC) has a variety decors. Ornamentation on ceramics is represented by different methods decoration channeled, cut or pressedlines, stripes formed various shaped stamps, as well appliques. Most «negatives» and «positives» are part compositions that form motif ornament.
 But there number images do not fit into these existing separately even ornamented vessels.
 There traditional solar symbols crosses, swastikas,...
The article deals with ceramic handmade vessel from a burial mound near Zolne village (mound No. 1, 10) in the central foothills of Crimea. Partially reconstructed fragments were found Scientific Funds Institute Archaeology National Academy Sciences Ukraine. After graphic reconstruction, it became clear that differs drawing given by A. Shchepynskyi, who was author excavations. Both and conditions its discovery are analyzed; analogies other complexes Crimea given. Based on typological...
We report a measurement of the CP-violation parameter sin2β with B0→J/ψK0S decays in which J/ψ to hadrons or muons that do not satisfy our standard identification criteria. With sample 88 million B¯B events collected by BABAR detector at PEP-II asymmetric-energy B factory SLAC, we reconstruct 100±17 such events, J/→ψπ+π−π0 being most prevalent, and measure sin2β=1.56±0.42(stat)±0.21(syst). Received 10 September 2003DOI:https://doi.org/10.1103/PhysRevD.69.052001©2004 American Physical Society