J. Caudron
A5106314174- 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
- Neutrino Physics Research
- Computational Physics and Python Applications
- Black Holes and Theoretical Physics
- Astrophysics and Cosmic Phenomena
- Distributed and Parallel Computing Systems
- Radiation Detection and Scintillator Technologies
- Particle Accelerators and Free-Electron Lasers
- Nuclear reactor physics and engineering
- Big Data Technologies and Applications
- Atomic and Subatomic Physics Research
- Scientific Computing and Data Management
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Structural Analysis of Composite Materials
- Medical Imaging Techniques and Applications
- Radioactivity and Radon Measurements
- Inertial Sensor and Navigation
- Geomagnetism and Paleomagnetism Studies
- Service and Product Innovation
University of Bonn
2016-2023
Johannes Gutenberg University Mainz
2014-2022
RWTH Aachen University
2012-2022
The University of Adelaide
2014-2020
Northern Illinois University
2016-2020
European Organization for Nuclear Research
2012-2020
University of Belgrade
2014-2020
Institute of High Energy Physics
2010-2017
LIP - Laboratory of Instrumentation and Experimental Particle Physics
2015-2016
Universidad de Granada
2015-2016
CMS is a general purpose experiment, designed to study the physics of pp collisions at 14 TeV Large Hadron Collider (LHC). It currently involves more than 2000 physicists from 150 institutes and 37 countries. The LHC will provide extraordinary opportunities for particle based on its unprecedented collision energy luminosity when it begins operation in 2007.
Results on two-particle angular correlations for charged particles emitted in proton-proton collisions at center-of-mass energies of 0.9, 2.36, and 7 TeV are presented, using data collected with the CMS detector over a broad range pseudorapidity (eta) azimuthal angle (phi). Short-range Delta(eta), which studied minimum bias events, characterized simple "independent cluster" parametrization order to quantify their strength (cluster size) extent eta decay width). Long-range differentially as...
Jet production in PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76 TeV was studied with the CMS detector LHC, using data sample corresponding to an integrated luminosity 6.7 inverse microbarns. Jets are reconstructed deposited calorimeters and as function collision centrality. With increasing centrality, striking imbalance dijet transverse momentum is observed, consistent jet quenching. The observed effect extends from lower cut-off used this study (jet = 120 GeV/c) up...
Measurements of the jet energy calibration and transverse momentum resolution in CMS are presented, performed with a data sample collected proton-proton collisions at centre-of-mass 7TeV, corresponding to an integrated luminosity 36pb−1. The balance dijet γ/Z+jets events is used measure response detector, as well resolution. results presented for three different methods reconstruct jets: calorimeter-based approach, ``Jet-Plus-Track'' which improves measurement calorimeter jets by exploiting...
Charged-hadron transverse-momentum and pseudorapidity distributions in proton-proton collisions at $\sqrt{s}=7\text{ }\text{ }\mathrm{TeV}$ are measured with the inner tracking system of CMS detector LHC. The charged-hadron yield is obtained by counting number reconstructed hits, hit pairs, fully charged-particle tracks. combination three methods gives a multiplicity per unit...
This report presents the capabilities of CMS experiment to explore rich heavy-ion physics programme offered by CERN Large Hadron Collider (LHC). The collisions lead nuclei at energies , will probe quark and gluon matter unprecedented values energy density. prime goal this research is study fundamental theory strong interaction — Quantum Chromodynamics (QCD) in extreme conditions temperature, density parton momentum fraction (low-x).
Measurements of inclusive charged-hadron transverse-momentum and pseudorapidity distributions are presented for proton-proton collisions at $\sqrt{s} = 0.9 $ 2.36 TeV. The data were collected with the CMS detector during LHC commissioning in December 2009. For non-single-diffractive interactions, average transverse momentum is measured to be 0.46 ± 0.01 (stat.) (syst.) GeV/c TeV 0.50 TeV, pseudorapidities between --2.4 +2.4. At these energies, densities central region, dN ch/dη||η|<0.5, 3:48...
A measurement of inclusive W and Z production cross sections in pp collisions at $ \sqrt {s} = 7 TeV is presented. The electron muon decay channels are analyzed a data sample collected with the CMS detector LHC corresponding to an integrated luminosity 36 pb−1. measured σ(pp → WX) × \mathcal{B}\left( {{\text{W}} \to \ell \nu } \right) 10.31 ± 0.02 (stat.) 0.09 (syst.) 0.10 (th.) 0.41 (lumi.) nb ZX) {{\text{Z}} {\ell^{+} }{\ell^{-} }} 0.974 0.007 0.018 0.039 nb, limited dilepton invariant...
Measurements of inclusive W and Z boson production cross sections in pp collisions at $ \sqrt {s} = 7 TeV are presented, based on 2.9 pb−1 data recorded by the CMS detector LHC. The measurements, performed electron muon decay channels, combined to give \sigma \left( {{\text{pp}} \to {\text{W}}X} \right) \times \mathcal{B}\left( {{\text{W}} \ell \nu } 9.95\pm 0.07\left( {{\text{stat}}{.}} \right)\pm 0.28\left( {{\text{syst}}{.}} 1.09 (lumi.) nb {\text{Z}}X} {Z {\ell^{+} }{\ell^{-} }} 0.931\pm...
A search for events with jets and missing transverse energy is performed in a data sample of $pp$ collisions collected at $\sqrt{s}=7\text{ }\text{ }\mathrm{TeV}$ by the CMS experiment LHC. The analyzed corresponds to an integrated luminosity $1.14\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. In this search, kinematic variable ${\ensuremath{\alpha}}_{\mathrm{T}}$ used as main discriminator between genuine misreconstructed energy. No excess over standard model expectation found. Exclusion limits...
A bstract Yields of prompt and non-prompt J/ ψ , as well $ \Upsilon (1S) mesons, are measured by the CMS experiment via their μ + − decays in PbPb pp collisions at \sqrt {{{s_{\text{NN}}}}} = 2.76 TeV for quarkonium rapidity | y < 2.4. Differential cross sections nuclear modification factors reported functions transverse momentum p T collision centrality. For with relatively high (6.5 30 GeV/ c ), a strong, centrality-dependent suppression is observed collisions, compared to yield scaled...
A search for supersymmetry with R-parity conservation in proton–proton collisions at a centre-of-mass energy of 7 TeV is presented. The data correspond to an integrated luminosity 35pb−1 collected by the CMS experiment LHC. performed events jets and significant missing transverse energy, characteristic decays heavy, pair-produced squarks gluinos. primary background, from standard model multijet production, reduced several orders magnitude negligible level application set robust kinematic...
The spectra of strange hadrons are measured in proton-proton collisions, recorded by the CMS experiment at CERN LHC, centre-of-mass energies 0.9 and 7 TeV. K^0_s, Lambda, Xi^- particles their antiparticles reconstructed from decay topologies production rates as functions rapidity transverse momentum. results compared to other experiments predictions PYTHIA Monte Carlo program. momentum distributions found differ substantially exceed up a factor three.
The production of J/ψ mesons is studied in pp collisions at $\sqrt{s} = 7$ TeV with the CMS experiment LHC. measurement based on a dimuon sample corresponding to an integrated luminosity 314 nb−1. differential cross section determined, as function transverse momentum, three rapidity ranges. A fit decay length distribution used separate prompt from non-prompt (b hadron J/ψ) component. Integrated over momentum 6.5 30 GeV/c and range |y|<2.4, measured sections, times branching fraction, are...
A comparison of the relative yields Υ resonances in μ(+)μ(-) decay channel Pb-Pb and pp collisions at a center-of-mass energy per nucleon pair 2.76 TeV is performed with data collected CMS detector LHC. Using muons transverse momentum above 4 GeV/c pseudorapidity below 2.4, double ratio Υ(2S) Υ(3S) excited states to Υ(1S) ground state collisions, [Υ(2S+3S)/Υ(1S)](Pb-Pb)/[Υ(2S+3S)/Υ(1S)](pp), found be 0.31(-0.15)(+0.19)(stat)±0.03(syst). The probability obtain measured value, or lower, if...
Isolated photon production is measured in proton–proton and lead–lead collisions at nucleon–nucleon centre-of-mass energies of 2.76 TeV the pseudorapidity range |η|<1.44 transverse ET between 20 80 GeV with CMS detector LHC. The spectra are found to be good agreement next-to-leading-order perturbative QCD predictions. ratio PbPb pp isolated ET-differential yields, scaled by number incoherent collisions, consistent unity for all reaction centralities.
Measurements of the normalized rapidity ($y$) and transverse-momentum (${q}_{\mathrm{T}}$) distributions Drell--Yan muon electron pairs in $Z$-boson mass region ($60<{M}_{\ensuremath{\ell}\ensuremath{\ell}}<120\text{ }\text{ }\mathrm{GeV}$) are reported. The results obtained using a data sample proton-proton collisions at center-of-mass energy 7 TeV, collected by CMS experiment Large Hadron Collider (LHC), corresponding to an integrated luminosity $36\text{ }{\mathrm{pb}}^{\ensuremath{-}1}$....
Measurements of primary charged hadron multiplicity distributions are presented for non-single-diffractive events in proton-proton collisions at centre-of-mass energies $ \sqrt {s} = 0.9 , 2.36, and 7 TeV, five pseudorapidity ranges from |η| < 0.5 to 2.4. The data were collected with the minimum-bias trigger CMS experiment during LHC commissioning runs 2009 TeV run 2010. distribution 0.9\;{\text{TeV}} is agreement previous measurements. At higher increase mean underestimated by most event...
The first LHC pp collisions at centre-of-mass energies of 0.9 and 2.36 TeV were recorded by the CMS detector in December 2009. trajectories charged particles produced reconstructed using all-silicon Tracker their momenta measured 3.8 T axial magnetic field. Results from commissioning are presented including studies timing, efficiency, signal-to-noise, resolution, ionization energy. Reconstructed tracks used to benchmark performance terms track vertex resolutions, reconstruction decays,...
A search for narrow resonances with a mass of at least 1 TeV in the dijet spectrum is performed using pp collisions sqrt(s)=7 corresponding to an integrated luminosity inverse femtobarn, collected by CMS experiment LHC. No are observed. Upper limits 95% confidence level presented on product resonance cross section, branching fraction into dijets, and acceptance, separately decays quark-quark, quark-gluon, gluon-gluon pairs. The data exclude new particles predicted following models level:...
The inclusive jet cross section is measured in pp collisions with a center-of-mass energy of 7 TeV at the LHC using CMS experiment. data sample corresponds to an integrated luminosity 34 inverse picobarns. measurement made for transverse momenta range 18-1100 GeV and absolute values rapidity less than 3. extends highest pT ever observed and, within experimental theoretical uncertainties, generally agreement next-to-leading-order perturbative QCD predictions.
A search for narrow resonances in the dijet mass spectrum is performed using data corresponding to an integrated luminosity of $2.9\text{ }\text{ }{\mathrm{pb}}^{\ensuremath{-}1}$ collected by CMS experiment at Large Hadron Collider. Upper limits 95% confidence level are presented on product resonance cross section, branching fraction into dijets, and acceptance, separately decays quark-quark, quark-gluon, or gluon-gluon pairs. The exclude new particles predicted following models level:...
A measurement is presented of the charged hadron multiplicity in hadronic PbPb collisions, as a function pseudorapidity and centrality, at collision energy 2.76 TeV per nucleon pair. The data sample collected using CMS detector minimum-bias trigger, with solenoid off. number hadrons measured both by counting reconstructed particle hits forming hit doublets pairs layers pixel detector. two methods give consistent results. density, dN ch /dη|η=0, for head-on collisions found to be 1612 ± 55,...
Over the past decade, a large number of jet substructure observables have been proposed in literature, and explored at LHC experiments. Such attempt to utilize internal structure jets order distinguish those initiated by quarks, gluons, or boosted heavy objects, such as top quarks W bosons. This report, originating from motivated BOOST2013 workshop, presents original particle-level studies that aim improve our understanding relationships between observables, their complementarity, dependence...