В. Н. Евдокимов
A5036538606- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Cosmology and Gravitation Theories
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Computational Physics and Python Applications
- Astrophysics and Cosmic Phenomena
- Abdominal Trauma and Injuries
- Nuclear physics research studies
- Congenital Diaphragmatic Hernia Studies
- Muon and positron interactions and applications
- Congenital Anomalies and Fetal Surgery
- Algorithms and Data Compression
- Advanced Queuing Theory Analysis
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Probability and Risk Models
- Crystallography and Radiation Phenomena
- Diagnosis and treatment of tuberculosis
- Superconducting Materials and Applications
- Urological Disorders and Treatments
Tyumen State Medical University
2020
Institute for High Energy Physics
2010-2019
Centro Brasileiro de Pesquisas Físicas
2009-2016
University of Illinois Chicago
2016
Czech Academy of Sciences, Institute of Physics
2000-2014
Charles University
2000-2014
Universidad San Francisco de Quito
1998-2014
Centre National de la Recherche Scientifique
1999-2014
Universidade Federal do ABC
2009-2014
University of Science and Technology of China
2009-2014
The D0 Collaboration reports on a search for the standard model top quark in pp¯ collisions at s=1.8TeV Fermilab Tevatron with an integrated luminosity of approximately 50pb−1. We have searched tt¯ production dilepton and single-lepton decay channels without tagging b-quark jets. observed 17 events expected background 3.8±0.6 events. probability upward fluctuation to produce signal is 2×10−6 (equivalent 4.6 deviations). kinematic properties excess are consistent decay. conclude that we...
We investigate the decay ${B}^{+}\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\phi}{K}^{+}$ in a search for $X(4140)$ state, narrow threshold resonance $J/\ensuremath{\psi}\ensuremath{\phi}$ system. The data sample corresponds to an integrated luminosity of $10.4\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ $p\overline{p}$ collisions at $\sqrt{s}=1.96\text{ }\mathrm{TeV}$ collected by D0 experiment Fermilab Tevatron collider. observe mass peak with statistical significance 3.1...
The D0 Collaboration has performed a measurement of the top quark mass mt based on six candidate events for process tt¯→bW+b¯W−, where W bosons decay to eν or μν. This sample was collected during an exposure detector integrated luminosity 125pb−1 s=1.8TeVpp¯ collisions. We obtain mt=168.4±12.3(stat)±3.6(syst)GeV/c2, consistent with obtained using single-lepton events. Combination and dilepton results yields mt=172.0±7.5GeV/c2.Received 16 June...
We present a search for events consistent with the production and decay of squarks gluinos minimal supersymmetric standard model (MSSM) in D0 detector at Fermilab Tevatron $p\overline{p}$ collider. examined data containing large missing transverse energy three or more jets. observed no excess above expected yield from processes. For choice MSSM parameter values, we set lower limit 95% confidence level on mass gluino 144 GeV ${/c}^{2}$ all squark masses 212 equal masses.
We determine the top quark mass m_t using t-tbar pairs produced in D0 detector by \sqrt{s} = 1.8 TeV p-pbar collisions a 125 pb^-1 exposure at Fermilab Tevatron. make two constraint fit to -> b W^+bbar W^- final states with one W boson decaying q-qbar and other e-nu or mu-nu. Likelihood fits data yield m_t(l+jets) 173.3 +- 5.6 (stat) 5.5 (syst) GeV/c^2. When this result is combined an analysis of events which both bosons decay into leptons, we obtain 172.1 5.2 4.9 An alternate analysis,...
We report on measurements inclusive cross sections times branching fractions into electrons for W and Z bosons produced in pp¯ collisions at s=1.8TeV. From an integrated luminosity of 84.5 pb−1 recorded 1994–1995 using the DØ detector Fermilab Tevatron, we determine σ(pp¯→W+X)×B(W→eν)=2310±10(stat)±50(syst)±100(lum)pb σ(pp¯→Z+X)×B(Z→ee)=221±3(stat)±4(syst)±10(lum)pb. these, derive σ(pp¯→W+X)×B(W→eν)/σ(pp¯→Z+X)×B(Z→ee)=10.43±0.15(stat)±0.20(syst)±0.10(NLO),...
We measure the top quark mass mt using tt¯ pairs produced in D0 detector by s=1.8TeVpp¯ collisions a 125pb−1 exposure at Fermilab Tevatron. make two constraint fit to tt¯→bW+b¯W− final states with one W decaying qq¯ and other eν or μν. Events are binned versus of probability for events be signal rather than background. Likelihood fits data yield mt=173.3±5.6(stat)±6.2(syst)GeV/c2.Received 11 March 1997DOI:https://doi.org/10.1103/PhysRevLett.79.1197©1997 American Physical Society
We measure the inclusive single muon charge asymmetry and like-sign dimuon in $p \bar{p}$ collisions using full data set of 10.4 fb$^{-1}$ collected with D0 detector at Fermilab Tevatron. The standard model predictions asymmetries induced by CP violation are small magnitude compared to current experimental precision, so non-zero measurements could indicate new sources violation. differ from these a significance 3.6 deviations. These results interpreted framework $B$ meson mixing within CKM...
We report a measurement of the top quark mass using six candidate events for process $p\overline{p}\ensuremath{\rightarrow}t\overline{t}+\stackrel{\ensuremath{\rightarrow}}{X}{l}^{+}\ensuremath{\nu}{\mathrm{bl}}^{\ensuremath{-}}\overline{\ensuremath{\nu}}\overline{b}+X$, observed in D0 experiment at Fermilab $p\overline{p}$ collider. Using maximum likelihood fits to dynamics decays, we measure...
We present a search for charged Higgs bosons in decays of pair-produced top quarks using $109.2\ifmmode\pm\else\textpm\fi{}5.8{\mathrm{pb}}^{\ensuremath{-}1}$ data recorded from $p\overline{p}$ collisions at $\sqrt{s}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.8\mathrm{TeV}$ by the D0 detector during 1992--1996 Fermilab Tevatron. No evidence is found production, and most parts $[{M}_{{H}^{+}},\mathrm{tan}\ensuremath{\beta}]$ parameter space where decay...
We present a search for pair produced top squarks, the supersymmetric partners of quark, using D0 detector at Fermilab Tevatron $p\overline{p}$ collider. consider scenario in which lighter two squarks ${\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{t}}_{1}$ decays with 100% branching fraction to charm quark and lightest neutralino \~{}\fi{}}{\ensuremath{\chi}}}_{1}^{0}$ yielding signal acollinear jets missing transverse energy. observe 3 events while we expect...
We present a search for anomalous components of the quartic gauge boson coupling WW{\gamma}{\gamma} in events with an electron, positron and missing transverse energy. The analyzed data correspond to 9.7 fb^-1 integrated luminosity collected by D0 detector ppbar collisions at sqrt(s) = 1.96 TeV. presence couplings would manifest itself as excess boosted WW events. No such is found data, we set most stringent limits date on parameters a_0^W a_C^W. When form factor Lambda_cutoff 0.5 TeV used,...
We report a new measurement of the cross section for production isolated photons with transverse energies ( ${E}_{T}^{\ensuremath{\gamma}}$) above 10 GeV and pseudorapidities $|\ensuremath{\eta}|<2.5$ in $p\overline{p}$ collisions at $\sqrt{s}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.8\mathrm{TeV}$. The results are based on data sample $107.6{\mathrm{pb}}^{\ensuremath{-}1}$ recorded during 1992--1995 D0 detector Fermilab Tevatron collider. background, predominantly from jets which...
We present a measurement of the $t\overline{t}$ production cross section in $p\overline{p}$ collisions at $\sqrt{s}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.8\mathrm{TeV}$ by D0 experiment Fermilab Tevatron. The is based on data from an integrated luminosity approximately $125{\mathrm{pb}}^{\ensuremath{-}1}$ accumulated during 1992--1996 collider run. observe 39 candidate events dilepton and $\mathrm{lepton}+\mathrm{jets}$ decay channels with expected background...
The DØ detector is used to study pp̄ collisions at the 1800 and 630 GeV center-of-mass energies available Fermilab Tevatron. To measure jets, uses a sampling calorimeter composed of uranium liquid argon as passive active media, respectively. Understanding jet energy calibration not only crucial for precision tests QCD, but also measurement particle masses determination physics backgrounds associated with new phenomena. This paper describes jets observed two in transverse pseudorapidity range...
The inclusive cross sections times leptonic branching ratios for W and Z boson production in PbarP collisions at Sqrt(s)=1.8 TeV were measured using the D0 detector Fermilab Tevatron collider: Sigma_W*B(W->e, nu) = 2.36 +/- 0.07 0.13 nb, Sigma_W*B(W->mu,nu) 2.09 0.23 0.11 Sigma_Z*B(Z-> e, e) 0.218 0.011 0.012 Sigma_Z*B(Z->mu,mu) 0.178 0.030 0.009 nb. first error is combined statistical systematic uncertainty, second reflects uncertainty luminosity. For electron muon analyses we find:...
We present a measurement of the $W$ boson production charge asymmetry in $p\bar{p}\rightarrow W+X \rightarrow e\nu +X$ events at center mass energy 1.96 TeV, using 9.7 fb$^{-1}$ integrated luminosity collected with D0 detector Fermilab Tevatron Collider. The neutrino longitudinal momentum is determined weighting method, and measured as function rapidity. extends over wider electron pseudorapidity region than previous results, most precise to date, allowing for determination proton parton...
We present a measurement of the differential cross section as function transverse momentum Z boson in ppbar collisions at sqrt{s}=1.8 TeV using data collected by D0 experiment Fermilab Tevatron Collider during 1994--1996. find good agreement between our and NNLO resummation prediction extract values non-perturbative parameters for resummed from fit to section.
We present a measurement of the Drell-Yan cross section at high dielectron invariant mass using $120\mathrm{pb}{}^{\ensuremath{-}1}$ data collected in $p\overline{p}$ collisions $\sqrt{s}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.8\mathrm{TeV}$ by D0 Collaboration during 1992--1996. No deviation from standard model expectations is observed. use to set limits on quark-electron compositeness scale. The $95%$ confidence level lower scale vary between 3.3 and 6.1 TeV depending assumed...
We present a measurement of the W boson mass using data collected by DØ experiment at Fermilab Tevatron during 1994–1995. identify bosons their decays to eν final states where electron is detected in forward calorimeter. extract MW fitting transverse and neutrino momentum spectra from sample 11 089 −→Weν decay candidates. use 1687 dielectron events, mostly due →Zee decays, constrain our model detector response. Using calorimeter data, we measure MW=80.691±0.227GeV. Combining measurements...
We present a quasi-model-independent search for the physics responsible electroweak symmetry breaking. define final states to be studied, and construct rule that identifies set of relevant variables any particular state. A new algorithm (“SLEUTH”) searches regions excess in those quantifies significance detected excess. After demonstrating sensitivity method, we apply it semi-inclusive channel eμX collected 108 pb−1 p¯p collisions at √s=1.8 TeV DØ experiment during 1992–1996 Fermilab...
Using data corresponding to an integrated luminosity of $79{\mathrm{pb}}^{\ensuremath{-}1}$, D0 has searched for events containing multiple jets and large missing transverse energy in $p\overline{p}$ collisions at $\sqrt{s}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.8\phantom{\rule{0ex}{0ex}}\mathrm{TeV}$ the Fermilab Tevatron collider. Observing no significant excess beyond what is expected from standard model, we set limits on masses squarks gluinos model parameters ${m}_{0}$...
We have searched for the pair production of first generation scalar leptoquarks in eejj channel using full data set (123pb−1) collected with D0 detector at Fermilab Tevatron during 1992–1996. observe no candidates an expected background approximately 0.4 events. Comparing experimental 95% confidence level upper limit to theoretical calculations cross section assumption a 100% branching fraction eq, we lower on mass leptoquark 225GeV/c2. The results this analysis rule out interpretation...
We have searched for first generation scalar leptoquark (LQ) pairs in the $e\ensuremath{\nu}+\mathrm{jets}$ channel using $p\overline{p}$ collider data $(\ensuremath{\int}L\mathrm{dt}\ensuremath{\approx}115{\mathrm{pb}}^{\ensuremath{-}1})$ collected by D0 experiment at Fermilab Tevatron during 1992--1996. The analysis yields no candidate events. combine results with those from $ee+\mathrm{jets}$ and $\ensuremath{\nu}\ensuremath{\nu}+\mathrm{jets}$ channels to obtain 95% confidence level...