F. Beaudette
A5077929526- 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
- Medical Imaging Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Radiation Detection and Scintillator Technologies
- Distributed and Parallel Computing Systems
- Superconducting Materials and Applications
- Nuclear reactor physics and engineering
- Gamma-ray bursts and supernovae
- Atomic and Subatomic Physics Research
- International Science and Diplomacy
- Advanced Data Storage Technologies
- Radiation Therapy and Dosimetry
- Optical properties and cooling technologies in crystalline materials
- Scientific Computing and Data Management
- Big Data Technologies and Applications
- Nuclear physics research studies
Laboratoire Leprince-Ringuet
2016-2025
École Polytechnique
2016-2025
Centre National de la Recherche Scientifique
2016-2025
Institute of High Energy Physics
2012-2024
Institut National de Physique Nucléaire et de Physique des Particules
2001-2024
University of Antwerp
2024
A. Alikhanyan National Laboratory
2024
Université Paris-Saclay
2002-2023
Université de Strasbourg
2023
Centre de Gestion Scientifique
2002-2019
We report the observation of X(3872) in J/psipi(+)pi(-) channel, with J/psi decaying to mu(+)mu(-), pp collisions at sqrt[s]=1.96 TeV. Using approximately 230 pb(-1) data collected Run II D0 detector, we observe 522+/-100 candidates. The mass difference between state and is measured be 774.9+/-3.1(stat)+/-3.0(syst) MeV/c(2). have investigated production decay characteristics find them similar those psi(2S) state.
The CMS collaboration has developed a fast Monte Carlo simulation of the detector with event production rates ∼100 times faster than GEANT4-based simulation, nonetheless comparable accuracy for most physics objects typically considered in analyses. We discuss basic technical principles Fast Simulation and their implementation different components detector: silicon tracker, electromagnetic calorimeter, hadronic muon system, Level 1 High Trigger. A few comparisons results both Full LHC data are shown.
Correlations in the azimuthal angle between two largest transverse momentum jets have been measured using D0 detector $p\overline{p}$ collisions at a center-of-mass energy $\sqrt{s}=1.96\text{ }\text{ }\mathrm{TeV}$. The analysis is based on an inclusive dijet event sample central rapidity region corresponding to integrated luminosity of $150\text{ }{\mathrm{pb}}^{\ensuremath{-}1}$. Azimuthal correlations are stronger larger momenta. These well described perturbative QCD next-to-leading...
The energy resolution of the barrel part CMS Electromagnetic Calorimeter has been studied using electrons 20 to 250 GeV in a test beam. incident electron's was reconstructed by summing measured arrays 3 × or 5 channels. There no significant amount correlated noise observed within these arrays. For at centre crystals, mean stochastic term be 2.8% and constant 0.3%. electrons' which is contained array depends on its position incidence. variation containment with corrected for distribution...
The results based on 1992-95 data (Run 1) from the CDF and DO experiments measurements of W boson mass width are presented, along with combined results. We report a Tevatron collider average M_W = 80.456 +- 0.059 GeV. also directly measured Gamma_W 2.115 0.105 describe new joint analysis direct measurements. Assuming validity standard model, we combine extracted ratio Z leptonic partial cross sections. This result for is 2.135 0.050 Finally, use total branching to extract Gamma(W -> e nu) 224 13 MeV.
A search for pair production of doubly-charged Higgs bosons in the process p pbar to H++H-- mu+mu+mu-mu- is performed with D0 Run II detector at Fermilab Tevatron. The analysis based on a sample inclusive di-muon data collected an energy sqrt{s}=1.96 TeV, corresponding integrated luminosity 113 pb-1. In absence signal, 95 % confidence level mass limits M(H++L)>118.4 GeV/c2 and M(H++R)>98.2 are set left-handed right-handed bosons, respectively, assuming 100% branching into muon pairs.
We present the results of a search for production new particles decaying into two jets in $\overline{p}p$ collisions at $\sqrt{s}=1.8\mathrm{TeV},$ using D\O{} 1992--1995 data set corresponding to ${109\mathrm{}\mathrm{pb}}^{\ensuremath{-}1}.$ exclude 95% confidence level excited quarks ${(q}^{*})$ with masses below 775 GeV/${c}^{2},$ most restrictive limit date. also standard-model-like ${W}^{\ensuremath{'}}$ ${(Z}^{\ensuremath{'}})$ bosons between 300 and 800 GeV/${c}^{2}$ (400 640...
We examine properties of ttbar candidates events in lepton+jets final states to establish the helicities W bosons t->W+b decays. Our analysis is based on a direct calculation probability that each event corresponds state, as function helicity boson. use 125 events/pb sample data collected by DO experiment during Run I Fermilab Tevatron collider at sqrt{s}=1.8 TeV, and obtain longitudinal fraction F_0=0.56+/-0.31, which consistent with prediction F_0=0.70 from standard model.
Abstract The Compact Muon Solenoid collaboration is designing a new high-granularity endcap calorimeter, HGCAL, to be installed later this decade. As part of development work, prototype system was built, with an electromagnetic section consisting 14 double-sided structures, providing 28 sampling layers. Each layer has hexagonal module, where multipad large-area silicon sensor glued between electronics circuit board and metal baseplate. pads approximately 1.1 cm 2 are wire-bonded the readout...
Abstract The upgrade of the CMS experiment for high luminosity operation LHC comprises replacement current endcap calorimeter by a granularity sampling (HGCAL). electromagnetic section HGCAL is based on silicon sensors interspersed between lead and copper (or tungsten) absorbers. hadronic uses layers stainless steel as an absorbing medium active in regions radiation exposure, scintillator tiles directly read out photomultipliers remaining regions. As part development detector its readout...
We present a search for large extra dimensions (ED) in pp collisions at center-of-mass energy of 1.8 TeV using data collected by the DØ detector Fermilab Tevatron 1994-1996. Data corresponding to 78.8+/-3.9 pb(-1) are examined events with missing transverse energy, one high-p(T) jet, and no isolated muons. There is excess observed beyond expectation from standard model, we place lower limits on fundamental Planck scale 1.0 0.6 2 7 ED, respectively.
The inclusive cross section for production of isolated photons has been measured in \pbarp collisions at $\sqrt{s} = 630$ GeV with the \D0 detector Fermilab Tevatron Collider. span a transverse energy ($E_T$) range from 7-49 and have pseudorapidity $|\eta| < 2.5$. This measurement is combined to previous result 1800$ form ratio sections. Comparison next-to-leading order QCD 630 sections show satisfactory agreement most $E_T$ range.
We have measured the W boson mass using DØ detector and a data sample of 82 pb−1 from Fermilab Tevatron collider. This measurement uses W→eν decays, where electron is close to boundary central electromagnetic calorimeter module. Such “edge” electrons not been used in any previous analysis, represent 14% increase size. For these electrons, new response resolution parameters are determined, revised backgrounds underlying event energy flow measurements made. When current combined with...
Results are presented on a measurement of the ttbar pair production cross section in ppbar collisions at sqrt{s} = 1.8 TeV from nine independent decay channels. The data were collected by Dzero experiment during 1992-1996 run Fermilab Tevatron Collider. A total 80 candidate events observed with an expected background 38.8 +- 3.3 events. For top quark mass 172.1 GeV/c^2, measured is 5.69 1.21 (stat) 1.04 (sys) pb.
We report the results of a search for supersymmetry (SUSY) with gauge-mediated breaking in missing transverse energy distribution inclusive diphoton events using $263\text{ }\text{ }{\mathrm{p}\mathrm{b}}^{\ensuremath{-}1}$ data collected by D0 experiment at Fermilab Tevatron Collider 2002--2004. No excess is observed above background expected from standard model processes, and lower limits on masses lightest neutralino chargino about 108 195 GeV, respectively, are set 95% confidence level....
The Compact Muon Solenoid (CMS) experiment has implemented a sophisticated two-level online selection system that achieves rejection factor of nearly 105. During Run II, the LHC will increase its centre-of-mass energy up to 13 TeV and progressively reach an instantaneous luminosity 2 × 1034 cm−2 s−1. In order guarantee successful ambitious physics programme under this intense environment, CMS Trigger Data acquisition (DAQ) been upgraded. A novel concept for L1 calorimeter trigger is...
Using the D0 detector, we have studied events produced in proton-antiproton collisions that contain large forward regions with very little energy deposition (``rapidity gaps'') and concurrent jet production at center-of-mass energies of root-s = 630 1800 Gev. The fractions central associated such rapidity gaps are measured compared to predictions from Monte Carlo models. For hard diffractive candidate events, use calorimeter extract fractional momentum loss scattered protons.