O. Dvornikov
A5048436496- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Neutrino Physics Research
- Radiation Effects in Electronics
- Advancements in Semiconductor Devices and Circuit Design
- Dark Matter and Cosmic Phenomena
- Advanced Research in Systems and Signal Processing
- Analog and Mixed-Signal Circuit Design
- Radiation Detection and Scintillator Technologies
- Astrophysics and Cosmic Phenomena
- Aerospace, Electronics, Mathematical Modeling
- Sensor Technology and Measurement Systems
- Semiconductor Quantum Structures and Devices
- Integrated Circuits and Semiconductor Failure Analysis
- Radio Frequency Integrated Circuit Design
- Semiconductor materials and devices
- Silicon Carbide Semiconductor Technologies
- Advanced Signal Processing Techniques
- Cosmology and Gravitation Theories
- Technology Assessment and Management
- Advanced MEMS and NEMS Technologies
- Material Properties and Applications
- Advanced Sensor Technologies Research
University of Hawaii System
2018-2023
University of Hawaiʻi at Mānoa
2020-2023
Belarusian State University of Informatics and Radioelectronics
2005-2023
Honolulu University
2023
Belarusian State University
1998-2018
Institute of High Energy Physics
2017
The Joint Institute of Mechanical Engineering
2013
Amsterdam University of the Arts
2006
University of Amsterdam
2006
Institute for High Energy Physics
2005
The Compact Muon Solenoid (CMS) detector is described. operates at the Large Hadron Collider (LHC) CERN. It was conceived to study proton-proton (and lead-lead) collisions a centre-of-mass energy of 14 TeV (5.5 nucleon-nucleon) and luminosities up 1034 cm−2 s−1 (1027 s−1). At core CMS sits high-magnetic-field large-bore superconducting solenoid surrounding an all-silicon pixel strip tracker, lead-tungstate scintillating-crystals electromagnetic calorimeter, brass-scintillator sampling hadron...
The CMS apparatus was identified, a few years before the start of LHC operation at CERN, to feature properties well suited particle-flow (PF) reconstruction: highly-segmented tracker, fine-grained electromagnetic calorimeter, hermetic hadron strong magnetic field, and an excellent muon spectrometer. A fully-fledged PF reconstruction algorithm tuned detector therefore developed has been consistently used in physics analyses for first time collider. For each collision, comprehensive list...
The spectra of charged particles produced within the pseudorapidity window |η| < 1 at $$ \sqrt{s_{\mathrm{N}\;\mathrm{N}}}=5.02 TeV are measured using 404 μb−1 PbPb and 27.4 pb−1 pp data collected by CMS detector LHC in 2015. presented over transverse momentum ranges spanning 0.5 p T 400 GeV 0.7 collisions. corresponding nuclear modification factor, R AA, is bins collision centrality. AA 5% most central collisions shows a maximal suppression factor 7-8 region 6-9 GeV. This dip followed an...
Charge-dependent azimuthal particle correlations with respect to the second-order event plane in p-Pb and PbPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV have been studied CMS experiment LHC. The measurement is performed three-particle correlation technique, using two particles same or opposite charge within pseudorapidity range |η|<2.4, third measured hadron forward calorimeters (4.4<|η|<5). observed differences between sign correlations, as functions multiplicity η...
The nuclear modification factor RAA and the azimuthal anisotropy coefficient v[2] of prompt nonprompt (i.e. those from decays b hadrons) J/psi mesons, measured PbPb pp collisions at sqrt(s[NN]) = 2.76 TeV LHC, are reported. results presented in several event centrality intervals kinematic regions, for transverse momenta pt > 6.5 GeV/c rapidity abs(y) < 2.4, extending down to 3 1.6 2.4 range. is found be nonzero, but with no strong dependence on centrality, rapidity, or over full range...
Differential and double-differential cross sections for the production of top quark pairs in proton-proton collisions at 13 TeV are measured as a function jet multiplicity kinematic variables quarks quark-antiquark system. This analysis is based on data collected by CMS experiment LHC corresponding to an integrated luminosity $2.3\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. The measurements performed $\mathrm{lepton}+\text{jets}$ decay channels with single muon or electron final state....
Pair production of Y(1S) mesons is observed at the LHC in proton-proton collisions $$ \sqrt{s}=8 TeV by CMS experiment a data sample corresponding to an integrated luminosity 20.7 fb−1. Both candidates are fully reconstructed via their decays μ + −. The fiducial acceptance region defined absolute rapidity smaller than 2.0. cross section for pairs, assuming that both decay isotropically, measured be 68.8±12.7 (stat)±7.4 (syst)±2.8 ( \mathrm{\mathcal{B}} ) pb, where third uncertainty comes...
The Fourier coefficients v[2] and v[3] characterizing the anisotropy of azimuthal distribution charged particles produced in PbPb collisions at sqrt(s[NN]) = 5.02 TeV are measured with data collected by CMS experiment. measurements cover a broad transverse momentum range, 1 < pT 100 GeV. analysis focuses on > 10 GeV where anisotropic distributions should reflect path-length dependence parton energy loss created medium. Results presented several bins collision centrality, spanning 60% most...
The performance of muon reconstruction in CMS is evaluated using a large data sample cosmic-ray muons recorded 2008. Efficiencies various high-level trigger, identification, and algorithms have been measured for broad range momenta, were found to be good agreement with expectations from Monte Carlo simulation. relative momentum resolution crossing the barrel part detector better than 1% at 10 GeV/c about 8% 500 GeV/c, latter being only factor two worse expected ideal alignment conditions....
The cross section for the production of single top quarks in t channel is measured proton-proton collisions at 13 TeV with CMS detector LHC. analyzed data correspond to an integrated luminosity 2.2 inverse femtobarns. event selection requires one muon and two jets where identified as originating from a bottom quark. Several kinematic variables are then combined into multivariate discriminator distinguish signal background events. A fit distribution discriminating variable yields total 238...
A search is presented for decays beyond the standard model of 125 GeV Higgs bosons to a pair light bosons, based on models with extended scalar sectors. Light boson masses between 5 and 62.5 are probed in final states containing four τ leptons, two muons b quarks, or leptons. The results from data proton-proton collisions corresponding an integrated luminosity 19.7 fb−1, accumulated by CMS experiment at LHC center-of-mass energy 8 TeV. No evidence such exotic found data. Upper limits set...
Normalized double-differential cross sections for top quark pair (t t-bar) production are measured in pp collisions at a centre-of-mass energy of 8 TeV with the CMS experiment LHC. The analyzed data correspond to an integrated luminosity 19.7 inverse femtobarns. measurement is performed dilepton e+/- mu-/+ final state. t t-bar section determined as function various pairs observables characterizing kinematics and system. compared calculations using perturbative quantum chromodynamics...
Transverse momentum spectra of charged pions, kaons, and protons are measured in proton-proton collisions at $\sqrt{s}=13\text{ }\text{ }\mathrm{TeV}$ with the CMS detector LHC. The particles, identified via their energy loss silicon tracker, transverse range ${p}_{\mathrm{T}}\ensuremath{\approx}0.1--1.7\text{ }\mathrm{GeV}/c$ rapidities $|y|<1$. ${p}_{\mathrm{T}}$ integrated yields compared to previous results smaller $\sqrt{s}$ predictions Monte Carlo event generators. average increases...
This paper reports the measurement of $$\mathrm{J}/{\psi }$$ meson production in proton–proton ( $$\mathrm {p}\mathrm {p}$$ ) and proton–lead {Pb}$$ collisions at a center-of-mass energy per nucleon pair $$5.02\,\text {TeV} $$ by CMS experiment LHC. The data samples used analysis correspond to integrated luminosities 28 $$\,\text {pb}^{-1}$$ 35 {nb}^{-1}$$ for collisions, respectively. Prompt nonprompt mesons, latter produced decay $${\mathrm {B}}$$ hadrons, are measured their dimuon...
A search for heavy resonances that decay to tau lepton pairs is performed using proton-proton collisions at sqrt(s) = 13 TeV. The data were collected with the CMS detector CERN LHC and correspond an integrated luminosity of 2.2 inverse femtobarns. observations are in agreement standard model predictions. An upper limit 95% confidence level on product production cross section branching fraction into calculated as a function resonance mass. For sequential model, presence Z' bosons decaying...
A search for new particles has been conducted using events with two high transverse momentum (p T) τ leptons that decay hadronically, at least high-p T jets, and missing energy from the lepton decays. The analysis is performed data proton-proton collisions, collected by CMS experiment in 2015 $$ \sqrt{s}=13 TeV, corresponding to an integrated luminosity of 2.1 fb−1. results are interpreted physics models. first model involves heavy right-handed neutrinos, Nℓ (ℓ = e, μ, τ), charged bosons,...
A search for the production of a single top quark in association with Z boson is presented, both to identify expected standard model process and flavour-changing neutral current interactions. The data sample corresponds an integrated luminosity 19.7 fb−1 recorded by CMS experiment at LHC proton-proton collisions $$ \sqrt{s}=8 TeV. Final states three leptons (electrons or muons) least one jet are investigated. An events yield compatible tZq observed, corresponding cross section measured be...
A search is presented for new massive resonances decaying to WW, WZ or ZZ bosons in $$ \ell \nu q\overline{q} and q\overline{q}q\overline{q} final states. Results are based on data corresponding an integrated luminosity of 2.3-2.7 fb−1 recorded proton-proton collisions at \sqrt{s}=13 TeV with the CMS detector LHC. Decays spin-1 spin-2 into two vector sought mass range 0.6-4.0 TeV. No significant excess over standard model background observed. Combining results states, cross section exclusion...
The cross section of top quark-antiquark pair production in proton-proton collisions at sqrt(s) = 13 TeV is measured by the CMS experiment LHC, using data corresponding to an integrated luminosity 2.2 inverse femtobarns. measurement performed analyzing events which final state includes one electron, muon, and two or more jets, least identified as originating from hadronization a b quark. 815 +/- 9 (stat) 38 (syst) 19 (lumi) pb, agreement with expectation standard model.
A measurement of the $$ \mathrm{t}\overline{\mathrm{t}} production cross section at \sqrt{s}=13 TeV is presented using proton-proton collisions, corresponding to an integrated luminosity 2.2 fb−1, collected with CMS detector LHC. Final states one isolated charged lepton (electron or muon) and least jet are selected categorized according accompanying multiplicity. From a likelihood fit invariant mass distribution identified as coming from hadronization bottom quark, measured be...
Abstract A thorough understanding of neutrino–nucleus scattering physics is crucial for the successful execution entire US neutrino program. Neutrino–nucleus interaction constitutes one biggest systematic uncertainties in experiments—both at intermediate energies affecting long-baseline deep underground experiment, as well low coherent program—and could be difference between achieving or missing discovery level precision. To this end, electron–nucleus experiments provide vital information to...
The resolution and the linearity of time measurements made with CMS electromagnetic calorimeter are studied samples data from test beam electrons, cosmic rays, beam-produced muons. resulting measured by lead tungstate crystals is better than 100 ps for energy deposits larger 10 GeV. Crystal-to-crystal synchronization a precision 500 performed using muons produced first LHC beams in 2008.
A search is presented for W' bosons in events with an electron or muon and large missing transverse momentum, using proton-proton collision data at sqrt(s) = 13 TeV collected the CMS detector 2015 corresponding to integrated luminosity of 2.3 inverse femtobarns. No evidence excess relative standard model expectations observed. For a boson described by sequential model, upper limits 95% confidence level are set on product production cross section branching fraction lower established new mass....