M. Chertok
A5071741011- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Medical Imaging Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Distributed and Parallel Computing Systems
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Superconducting Materials and Applications
- Gamma-ray bursts and supernovae
- CCD and CMOS Imaging Sensors
- International Science and Diplomacy
- Nuclear physics research studies
- Nuclear Physics and Applications
- Radiation Therapy and Dosimetry
- Radiation Effects in Electronics
- Parallel Computing and Optimization Techniques
- Stochastic processes and financial applications
University of California, Davis
2014-2025
University of California System
2024-2025
Institute of High Energy Physics
2013-2024
A. Alikhanyan National Laboratory
2022-2024
University of Antwerp
2024
University of California, Los Angeles
2023
European Organization for Nuclear Research
2014
Texas A&M University
1997-2011
Children's Defense Fund
1998-2011
Kyungpook National University
2011
We present a new measurement of the inclusive and differential production cross sections $J/\ensuremath{\psi}$ mesons $b$ hadrons in proton-antiproton collisions at $\sqrt{s}=1960\text{ }\text{ }\mathrm{G}\mathrm{e}\mathrm{V}$. The data correspond to an integrated luminosity $39.7\text{ }{\mathrm{p}\mathrm{b}}^{\ensuremath{-}1}$ collected by CDF run II detector. find section for all transverse momenta from 0 $20\text{ }\mathrm{G}\mathrm{e}\mathrm{V}/c$ rapidity range $|y|<0.6$ be...
The mass of the W boson, a mediator weak force between elementary particles, is tightly constrained by symmetries standard model particle physics. Higgs boson was last missing component model. After observation measurement provides stringent test We measure mass, MW, using data corresponding to 8.8 inverse femtobarns integrated luminosity collected in proton-antiproton collisions at 1.96 tera-electron volt center-of-mass energy with CDF II detector Fermilab Tevatron collider. A sample...
We have observed bottom-charm mesons B_c via the decay mode Bc -> J/psi lepton neutrino in 1.8 TeV p-bar p collisions using CDF detector at Fermilab Tevatron. A fit of background and signal contributions to + mass distribution yielded 20.4 +6.2 -5.5 events from mesons. same with alone was rejected level 4.8 standard deviations. measured be 6.40 +- 0.39 0.13 GeVc^2 lifetime tau(B_c) = 0.46 +0.18 -0.16 0.03 ps. production cross section times branching ratio for relative that B+ K 0.132 +0.041...
We present a measurement of the $t\overline{t}$ production cross section using events with one charged lepton and jets from $p\overline{p}$ collisions at center-of-mass energy 1.96 TeV. In these events, heavy flavor quarks top quark decay are identified secondary vertex tagging algorithm. From $162\text{ }\text{ }\mathrm{p}{\mathrm{b}}^{\ensuremath{-}1}$ data collected by Collider Detector Fermilab, total 48 candidate selected, where $13.5\ifmmode\pm\else\textpm\fi{}1.8$ expected background...
We report the observation of bottom-charmed mesons ${B}_{c}$ in 1.8 TeV $p\overline{p}$ collisions using CDF detector at Fermilab Tevatron. The were found through their semileptonic decays, ${B}_{c}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}J/\ensuremath{\psi}{l}^{\ifmmode\pm\else\textpm\fi{}}X.$ A fit to $J/\ensuremath{\psi}l$ mass distribution yielded ${20.4}_{\ensuremath{-}5.5}^{+6.2}$ events from mesons. test null hypothesis, i.e., an attempt data with background alone, was...
The growth and development of ``charged particle jets'' produced in proton-antiproton collisions at $1.8 \mathrm{TeV} $ are studied over a transverse momentum range from $0.5$ $\mathrm{GeV}/c$ to $50$ $\mathrm{GeV}/c.$ A variety leading (highest momentum) charged jet observables compared with the QCD Monte Carlo models HERWIG, ISAJET, PYTHIA. describe fairly well multiplicity distribution particles within jet, size radial around direction, jet. direction jet'' each event is used define three...
The transverse momentum and total cross section of e^+e^- pairs in the Z-boson region 66<M_{ee}<116 GeV$/c^2$ from $p\bar{p}$ collisions at $\sqrt{s}=1.8$ TeV are measured using 110 pb^{-1} taken by Collider Detector Fermilab during 1992-1995. is to be $248 \pm 11$ pb. differential compared with calculations that match quantum chromodynamics perturbation theory high gluon resummation formalism low momentum.
We report the first measurements of inclusive W and Z cross sections times leptonic branching ratios for pp collisions at square root[s]=1.96 TeV, based on their decays to electrons muons. The data correspond an integrated luminosity 72 pb(-1) recorded with CDF detector Fermilab Tevatron. test e-mu universality in decays, we measure ratio rates from which fraction B(W-->lnu) can be extracted as well indirect value total width Cabibbo-Kobayashi-Maskawa matrix element, |V(cs)|.
We search for the flavor-changing neutral current decays of top quark t→qγ and t→qZ (here q represents c u quarks) in ¯pp collisions at √s=1.8TeV. use a dataset (∫Ldt∼110pb−1) collected during 1992–1995 run Collider Detector Fermilab. set 95% confidence level limits on branching fractions B(t→qγ)<3.2% B(t→qZ)<33%, consistent with standard model.Received 24 July 1997DOI:https://doi.org/10.1103/PhysRevLett.80.2525©1998 American Physical Society
This paper reports an updated measurement of the Standard Model CP violation parameter $\sin2\beta$ using CDF Detector at Fermilab. The entire Run I data sample 110 pb$^{-1}$ proton antiproton collisions $\sqrt{s}=1.8 TeV$ is used to identify a signal $\sim 400$ $B \to J/\psi K^0_S$ events, where $J/\psi \mu^+\mu^-$ and $K_S^0 \pi^+\pi^-$. flavor neutral B meson identified time production by combining information from three tagging algorithms: same-side tag, jet-charge soft-lepton tag. A...
We present a measurement of the top quark mass using sample tt¯ decays into an electron or muon, neutrino, and four jets. The data were collected in pp¯ collisions at s=1.8TeV with Collider Detector Fermilab correspond to integrated luminosity 109pb−1. measure be 175.9±4.8(stat)±4.9(syst)GeV/c2.Received 30 September 1997DOI:https://doi.org/10.1103/PhysRevLett.80.2767©1998 American Physical Society
We present an analysis of the discovery reach for supersymmetric particles at upgraded Tevatron collider, assuming that SUSY breaking results in universal soft parameters grand unification scale, and lightest particle is stable neutral. first a review literature, including issues unification, renormalization group evolution supersymmetry effect radiative corrections on effective low energy couplings masses theory. consider experimental bounds coming from direct searches those arising...
We present an analysis of dilepton events originating from top-antitop production in proton-antiproton collisions at sqrt{s}=1.8 TeV the Fermilab Tevatron Collider. The sample corresponds to integrated luminosity 109+-7 pb^{-1}. observe 9 candidate events, with estimated background 2.4+-0.5 events. determine mass top quark be M_top = 161+-17(stat.)+-10(syst.) GeV/c^2. In addition we measure a cross section 8.2+4.4-3.4 pb (where 175 GeV/c^2 has been assumed for acceptance estimate).
We describe a measurement of the charge asymmetry leptons from $W$-boson decays in rapidity range $0<|{y}_{l}|<2.5$ using $W\ensuremath{\rightarrow}e\ensuremath{\nu},\ensuremath{\mu}\ensuremath{\nu}$ events $110\ifmmode\pm\else\textpm\fi{}7{\mathrm{pb}}^{\ensuremath{-}1}$ data collected by CDF detector during 1992--1995. The constrain ratio $d$ and $u$ quark momentum distributions proton over $x$ $0.006$ to $0.34$ at ${Q}^{2}\ensuremath{\approx}{M}_{W}^{2}$. predictions that use parton...
We report a new measurement of dijet production by color-singlet exchange in $p\overline{p}$ collisions at $\sqrt{s}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.8\mathrm{TeV}$ the Fermilab Tevatron. In sample events with two jets transverse energy ${E}_{T}^{\mathrm{jet}}>20\mathrm{GeV}$, pseudorapidity range $1.8<|{\ensuremath{\eta}}^{\mathrm{jet}}|<3.5$, and ${\ensuremath{\eta}}_{1}{\ensuremath{\eta}}_{2}<0$, we find that fraction...
We present a new measurement of the top quark mass in $t\overline{t}$ events which both $W$ bosons from quarks decay into leptons $(e\ensuremath{\nu},\ensuremath{\mu}\ensuremath{\nu})$. use collected by CDF experiment $p\overline{p}$ collisions at $\sqrt{s}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.8\mathrm{TeV}$ Tevatron collider. measure...
We report on a search for B(0)(s)-->micro(+)micro(-) and B(0)(d)-->micro(+)micro(-) decays in pp collisions at square root of s=1.96 TeV using 171 pb(-1) data collected by the CDF II experiment Fermilab Tevatron Collider. The decay rates these rare processes are sensitive to contributions from physics beyond standard model. One event survives all our selection requirements, consistent with background expectation. derive branching ratio limits B(B(0)(s)-->micro(+)micro(-))<5.8x10(-7)...
We present a detailed description of search for anomalous production missing ET (E/T), jets, leptons (e,μ,τ), b quarks, or additional photons in events containing two isolated, central (|η|<1.0) with ET>12GeV. The results are consistent standard model expectations, the possible exception one event that has, addition to photons, electron, high-ET electromagnetic cluster, and large E/T. set limits using specific SUSY scenarios diphoton Received 30 June...
We report the first observation of dijet events with a double Pomeron exchange topology produced in &pmacr;p collisions at sqrt[s] = 1800 GeV. The are characterized by leading antiproton, two jets central pseudorapidity region, and large rapidity gap on outgoing proton side. present results jet kinematics production rates, compare them corresponding from single diffractive inclusive production, test factorization.
We have searched for direct pair production of scalar top and bottom quarks in 88 pb-1 pp collisions at sqrt[s]=1.8 TeV with the CDF detector. looked events a heavy flavor jets missing energy, consistent (bottom) quark decays to charm neutralino. The numbers that pass our selections show no significant deviation from standard model expectations. compare results next-to-leading order cross sections exclude regions quark-neutralino mass parameter space.
We present the results of a search for anomalous resonant production tau lepton pairs with large invariant mass, first such using CDF II Detector in Run Tevatron pp collider. Such could arise from various new physics processes. In data sample corresponding to 195 pb(-1) integrated luminosity we predict 2.8+/-0.5 events standard model background processes and observe 4. use this result set limits on heavy scalar vector particles decaying pairs.