- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Distributed and Parallel Computing Systems
- Radiation Detection and Scintillator Technologies
- Medical Imaging Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Advanced Data Storage Technologies
- Atomic and Subatomic Physics Research
- advanced mathematical theories
- Muon and positron interactions and applications
- Atmospheric Ozone and Climate
- Big Data Technologies and Applications
- Gamma-ray bursts and supernovae
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Radio Astronomy Observations and Technology
- Digital Radiography and Breast Imaging
Laboratoire de Physique Nucléaire et de Hautes Énergies
2016-2025
Sorbonne Université
2016-2025
Centre National de la Recherche Scientifique
2016-2025
Institut National de Physique Nucléaire et de Physique des Particules
2014-2025
Université Paris Cité
2016-2025
Sorbonne Paris Cité
2018-2025
Tufts University
2015-2024
Federación Española de Enfermedades Raras
2024
Universidad Nacional de La Plata
2023-2024
Rutherford Appleton Laboratory
2011-2024
Using data collected at the Pierre Auger Observatory during past 3.7 years, we demonstrated a correlation between arrival directions of cosmic rays with energy above 6 × 10 19 electron volts and positions active galactic nuclei (AGN) lying within ∼75 megaparsecs. We rejected hypothesis an isotropic distribution these least 99% confidence level from prescribed priori test. The observed is compatible that highest-energy particles originate nearby extragalactic sources whose flux has not been...
The energy spectrum of cosmic rays above 2.5 x 10;{18} eV, derived from 20,000 events recorded at the Pierre Auger Observatory, is described. spectral index gamma particle flux, J proportional, variantE;{-gamma}, energies between 4 eV and 10;{19} 2.69+/-0.02(stat)+/-0.06(syst), steepening to 4.2+/-0.4(stat)+/-0.06(syst) higher energies. hypothesis a single power law rejected with significance greater than 6 standard deviations. data are consistent prediction by Greisen Zatsepin Kuz'min.
During the shutdown of CERN Large Hadron Collider in 2013-2014, an additional pixel layer was installed between existing Pixel detector ATLAS experiment and a new, smaller radius beam pipe. The motivation for this new layer, Insertable B-Layer (IBL), to maintain or improve robustness performance tracking system, given higher instantaneous integrated luminosities realised following shutdown. Because extreme radiation collision rate environment, several radiation-tolerant sensor electronic...
The surface detector array of the Pierre Auger Observatory is sensitive to Earth-skimming tau neutrinos that interact in Earth's crust. Tau leptons from ${\ensuremath{\nu}}_{\ensuremath{\tau}}$ charged-current interactions can emerge and decay atmosphere produce a nearly horizontal shower with significant electromagnetic component. data collected between 1 January 2004 31 August 2007 are used place an upper limit on diffuse flux at EeV energies. Assuming...
We combine searches by the CDF and D0 Collaborations for a Higgs boson decaying to ${W}^{+}{W}^{\ensuremath{-}}$. The data correspond an integrated total luminosity of 4.8 (CDF) 5.4 (D0) ${\mathrm{fb}}^{\ensuremath{-}1}$ $p\overline{p}$ collisions at $\sqrt{s}=1.96\text{ }\text{ }\mathrm{TeV}$ Fermilab Tevatron collider. No excess is observed above background expectation, resulting limits on production exclude standard model in mass range 162--166 GeV 95% C.L.
Data collected at the Pierre Auger Observatory are used to establish an upper limit on diffuse flux of tau neutrinos in cosmic radiation. Earth-skimming ${\ensuremath{\nu}}_{\ensuremath{\tau}}$ may interact Earth's crust and produce a $\ensuremath{\tau}$ lepton by means charged-current interactions. The emerge from Earth decay atmosphere nearly horizontal shower with typical signature, persistent electromagnetic component even very large atmospheric depths. search procedure select events...
We report the observation of electroweak single top quark production in $3.2\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ $p\overline{p}$ collision data collected by Collider Detector at Fermilab $\sqrt{s}=1.96\text{ }\mathrm{TeV}$. Candidate events $W+\mathrm{\text{jets}}$ topology with a leptonically decaying $W$ boson are classified as signal-like four parallel analyses based on likelihood functions, matrix elements, neural networks, and boosted decision trees. These results combined...
We present a measurement of the cross section for W-boson production in association with jets p¯p collisions at √s=1.96 TeV. The analysis uses data sample corresponding to an integrated luminosity 320 pb−1 collected CDF II detector. W bosons are identified their electron decay channel and reconstructed using cone algorithm. For each W+≥n−jet (n=1−4) we measure differential dσ(p¯p→W+≥n−jet)/dEnth−jetT×B(W→eν) respect transverse energy ET nth-highest jet above 20 GeV, total...
We report a measurement of the single-top-quark production cross section in $2.2\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ $p\overline{p}$ collision data collected by Collider Detector at Fermilab $\sqrt{s}=1.96\text{ }\mathrm{TeV}$. Candidate events are classified as signal-like three parallel analyses which use likelihood, matrix element, and neural network discriminants. These results combined order to improve sensitivity. observe signal consistent with standard model prediction,...
We have measured the differential cross section for inclusive production of psi(2S) mesons decaying to mu^{+} mu^{-1} that were produced in prompt or B-decay processes from ppbar collisions at 1.96 TeV. These measurements been made using a data set an integrated luminosity 1.1 fb^{-1} collected by CDF II detector Fermilab. For events with transverse momentum p_{T} (psi(2S)) > 2 GeV/c and rapidity |y(psi(2S))| < 0.6 we measure sigma(ppbar -> psi(2S)X) Br(psi(2S) mu^{-}) be 3.29 +-...
We combine results from searches by the CDF and D0 collaborations for a standard model Higgs boson ($H$) in process $gg\ensuremath{\rightarrow}H\ensuremath{\rightarrow}{W}^{+}{W}^{\ensuremath{-}}$ $p\overline{p}$ collisions at Fermilab Tevatron Collider $\sqrt{s}=1.96\text{ }\text{ }\mathrm{TeV}$. With $4.8\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of integrated luminosity analyzed $5.4\text{ D0, 95% confidence level upper limit on...