A5107984938- 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
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Particle Accelerators and Free-Electron Lasers
- Radiation Detection and Scintillator Technologies
- Medical Imaging Techniques and Applications
- Radiation Therapy and Dosimetry
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Distributed and Parallel Computing Systems
- Nuclear reactor physics and engineering
- International Science and Diplomacy
- Gamma-ray bursts and supernovae
- Particle accelerators and beam dynamics
- Planetary Science and Exploration
- Radioactivity and Radon Measurements
- Nuclear Physics and Applications
- Nuclear physics research studies
University of Maryland, College Park
2016-2025
Institute of High Energy Physics
2015-2024
University of Antwerp
2024
A. Alikhanyan National Laboratory
2011-2024
University of Belgrade
2023
Instituto de Física de Cantabria
2023
Universidad de Cantabria
2023
Ibero American University
2020-2023
University of Bari Aldo Moro
2016
Istituto Nazionale di Fisica Nucleare, Sezione di Bari
2016
Abstract The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,143 new measurements 709 papers, we list, evaluate, average measured properties gauge bosons the recently discovered Higgs boson, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle search limits are listed in Summary Tables. give numerous tables, figures, formulae,...
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...
The summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,717 new measurements 869 papers, we list, evaluate, average measured properties gauge bosons the recently discovered Higgs boson, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle search limits are listed in Summary Tables. give numerous tables, figures, formulae, reviews topics...
We present the results of a search for top quark in 19.3 pb−1 p¯p collisions at √s =1.8 TeV. The data were collected Fermilab Tevatron collider using Collider Detector (CDF). includes standard model tt¯ decays to final states eeνν¯, eμνν¯, and μμνν¯ as well e+ν+jets or μ+ν+jets. In (e,μ)+ν+jets channel we b quarks from t via secondary vertex identification semileptonic cascade c quarks. dilepton find two events with background 0.56+0.25−0.13 events. e,μ+ν+jets identified vertex, six 2.3±0.3....
We summarize a search for the top quark with Collider Detector at Fermilab (CDF) in sample of p¯p collisions √s =1.8 TeV an integrated luminosity 19.3 pb−1. find 12 events consistent either two W bosons, or boson and least one b jet. The probability that measured yield is background 0.26%. Though statistics are too limited to establish firmly existence quark, natural interpretation excess it due tt¯ production. Under this assumption, constrained fits individual mass 174±10+13−12 GeV/c2....
The production and event topology of three-jet events produced in p¯p collisions at √s=1.8 TeV have been studied with the Collider Detector Fermilab Tevatron Collider. distributions angular variables (ψ∗ cosθ∗) describing energy sharing between jets (x3 x4) are found to agree well tree-level QCD calculations. These predicted different shapes for initial-state subprocesses (quark-antiquark, quark-gluon, gluon-gluon). data consistent small expected contribution from quark-antiquark initial...
Inclusive J/\ensuremath{\psi} and \ensuremath{\psi}(2S) production has been studied in p\ifmmode\bar\else\textasciimacron\fi{}p collisions at \ensuremath{\surd}s =1.8 TeV using 2.6\ifmmode\pm\else\textpm\fi{}0.2 ${\mathrm{pb}}^{\mathrm{\ensuremath{-}}1}$ of data taken with the Collider Detector Fermilab. The products cross section times branching fraction were measured as functions ${\mathit{P}}_{\mathit{T}}$ for...
We report a measurement of the proton-antiproton total cross section ${\mathrm{\ensuremath{\sigma}}}_{\mathit{T}}$ at c.m.s. energies \ensuremath{\surd}s =546 and 1800 GeV. Using luminosity-independent method, we find ${\mathrm{\ensuremath{\sigma}}}_{\mathit{T}}$=61.26\ifmmode\pm\else\textpm\fi{}0.93 mb GeV 80.03\ifmmode\pm\else\textpm\fi{}2.24 =1800 In this energy range, ratio ${\mathrm{\ensuremath{\sigma}}}_{\mathrm{el}}$/${\mathrm{\ensuremath{\sigma}}}_{\mathit{T}}$ increases from...
Kinematic properties of four-jet events produced in $p\overline{p}$ collisions at $\sqrt{s}=1.8$ TeV have been studied using data with an integrated luminosity 325 ${\mathrm{nb}}^{\ensuremath{-}1}$ collected the Collider Detector Fermilab during 1988-1989 run. The individual jet ${p}_{T}$ spectra and angles between each pair are compared to predictions leading-order quantum chromodynamics for double gluon bremsstrahlung process good agreement is observed. In addition, a search parton...
We have analyzed events with jets and large missing transverse energy produced in p¯p colisions at √s =1.8 TeV. The observed event rate is consistent standard model predictions. In a version of the supersymmetry (SUSY) light photino (mγ̃<15 GeV/c2) no cascade decays, we exclude 90% confidence level existence squarks gluinos masses less than 126 141 GeV/c2, respectively. mass limits are lower other choices SUSY parameters. An example presented.Received 17 August...
Antiproton-proton elastic scattering was measured at c.m.s. energies √s =546 and 1800 GeV in the range of four-momentum transfer squared 0.025<-t<0.29 GeV2. The data are well described by exponential form ebt with a slope b=15.28±0.58 (16.98±0.25) GeV−2 (1800) GeV. cross sections are, respectively, σel=12.87±0.30 19.70±0.85 mb.Received 5 August 1993DOI:https://doi.org/10.1103/PhysRevD.50.5518©1994 American Physical Society
We present results from searches for the top quark pp\ifmmode\bar\else\textasciimacron\fi{} collisions at Fermilab Tevatron Collider. The data sample was collected during 1988--89 with Collider Detector and has an integrated luminosity of 4.1 ${\mathrm{pb}}^{\mathrm{\ensuremath{-}}1}$. Our previous search e\ensuremath{\mu} final states tt\ifmmode\bar\else\textasciimacron\fi{}\ensuremath{\rightarrow}e\ensuremath{\nu}b \ensuremath{\mu}\ensuremath{\nu}b\ifmmode\bar\else\textasciimacron\fi{}...
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 present new results on the search for top quark in p¯p collisions at √s=1.8 TeV with an integrated luminosity of 13.5±1.6 pb–1. have considered t¯t production standard model using electron and muon dilepton decay channels ( t¯t→eμ+ jets, ee+ μμ+ jets) single-lepton t¯t→e+ jets μ+ without tagging b jets. From all we nine events expected background 3.8±0.9. If assume that excess is due to production, a mass 180 GeV/ c2, obtain cross section 8.2±5.1 pb.Received 7 November...
A prompt photon cross section measurement from the Collider Detector at Fermilab experiment is presented. and trigger upgrades, as well 6 times integrated luminosity compared with our previous publication, have contributed to a much more precise extended PT range. As before, QCD calculations agree qualitatively measured section, but data has steeper slope than calculations.Received 26 July 1994DOI:https://doi.org/10.1103/PhysRevLett.73.2662©1994 American Physical Society
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 report a measurement of the inclusive muon and b-quark production cross sections in pp¯ collisions at s=1.8 TeV using D0 detector Fermilab Tevatron collider. The spectrum extends over kinematic range |yμ|<0.8 3.5<pTμ<60GeV/c, is well described by expected contributions from various known sources. section for |yb|<1.0 pTb>6GeV/c extracted, agrees with next-to-leading order QCD predictions within experimental theoretical uncertainties.Received 12 December...
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 report a measurement of the diffraction dissociation differential cross section ${\mathit{d}}^{2}$${\mathrm{\ensuremath{\sigma}}}_{\mathrm{SD}}$/${\mathit{dM}}^{2}$dt for p\ifmmode\bar\else\textasciimacron\fi{}p\ensuremath{\rightarrow}p\ifmmode\bar\else\textasciimacron\fi{}X at \ensuremath{\surd}s =546 and 1800 GeV, ${\mathit{M}}^{2}$/s0.2 0\ensuremath{\le}-t\ensuremath{\le}0.4 ${\mathrm{GeV}}^{2}$. Our results are compared to theoretical predictions extrapolations from experimental lower...
We report on the test beam results and calibration methods using high energy electrons, pions muons with CMS forward calorimeter (HF). The HF covers a large pseudorapidity region ( $3\leq|\eta|\leq5$ ), is essential for number of physics channels missing transverse energy. It also expected to play prominent role in measurement tagging jets weak boson fusion Higgs production. based steel absorber embedded fused-silica-core optical fibers where Cherenkov radiation forms basis signal...