A. Blondel
A5069766440- 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
- Neutrino Physics Research
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Superconducting Materials and Applications
- Distributed and Parallel Computing Systems
- Radiation Detection and Scintillator Technologies
- Muon and positron interactions and applications
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- International Science and Diplomacy
- advanced mathematical theories
- Nuclear physics research studies
- Scientific Computing and Data Management
- Advanced Data Storage Technologies
- Medical Imaging Techniques and Applications
- Optical Polarization and Ellipsometry
- Solar and Space Plasma Dynamics
Laboratoire de Physique Nucléaire et de Hautes Énergies
1999-2025
Sorbonne Université
2020-2025
Centre National de la Recherche Scientifique
1994-2025
Université Paris Cité
2020-2024
University of Geneva
2013-2022
Institut National de Physique Nucléaire et de Physique des Particules
1991-2022
École Polytechnique
1995-2022
European Organization for Nuclear Research
1995-2022
Max Planck Society
2019
Laboratoire de Physique Corpusculaire
2016
The discovery by the ATLAS and CMS experiments of a new boson with mass around 125 GeV measured properties compatible those Standard-Model Higgs boson, coupled absence discoveries phenomena beyond Standard Model at TeV scale, has triggered interest in ideas for future factories. A circular e+e- collider hosted 80 to 100 km tunnel, TLEP, is among most attractive solutions proposed so far. It clean experimental environment, produces high luminosity top-quark, W Z studies, accommodates multiple...
The status of the research on muon colliders is discussed and plans are outlined for future theoretical experimental studies. Besides continued work parameters a 3-4 0.5 TeV center-of-mass (CoM) energy collider, many studies now concentrating machine near 0.1 that could be factory s-channel production Higgs particles. We discuss various components in such colliders, starting from proton accelerator needed to generate pions heavy-Z target proceeding through phase rotation decay ($\pi \to \mu...
We present a study of the decay properties charmed D mesons produced near peak ψ''(3770) resonance in e+e− annihilation. Branching fractions for nine Cabibbo-favored and three Cabibbo-suppressed modes are presented along with upper limits on one additional four modes. A Kππ-decay-mode Dalitz plots reveals large quasi-two-body pseudoscalar-vector component D0 decays an apparent nonuniform population plot D+ into K−π+π+. Using tagged events, we measure charged-particle multiplicity...
The Proceedings of the 2011 workshop on Fundamental Physics at Intensity Frontier. Science opportunities intensity frontier are identified and described in areas heavy quarks, charged leptons, neutrinos, proton decay, new light weakly-coupled particles, nucleons, nuclei, atoms.
This report summarizes the work of Energy Frontier Higgs Boson working group 2013 Community Summer Study (Snowmass). We identify key elements a precision physics program and document potential future experimental facilities as elucidated during Snowmass study. study couplings to gauge boson fermion pairs, double production for self-coupling, its quantum numbers $CP$-mixing in couplings, mass total width, prospects direct searches additional bosons extensions Standard Model. Our includes...
We propose an experiment (Mu3e) to search for the lepton flavour violating decay mu+ -> e+e-e+. aim ultimate sensitivity of one in 10^16 mu-decays, four orders magnitude better than previous searches. This is made possible by exploiting modern silicon pixel detectors providing high spatial resolution and hodoscopes using scintillating fibres tiles precise timing information at particle rates.
Interaction cross sections and charged pion spectra in p+C interactions at 31 GeV/c were measured with the large acceptance NA61/SHINE spectrometer CERN SPS. These data are required to improve predictions of neutrino flux for T2K long baseline oscillation experiment Japan. A set collected during first run 2007 an isotropic graphite target a thickness 4% nuclear interaction length was used analysis. The inelastic production 257.2 +- 1.9 8.9 mb 229.3 9.0 mb, respectively. Inclusive negatively...
NA61/SHINE (SPS Heavy Ion and Neutrino Experiment) is a multi-purpose experimental facility to study hadron production in hadron-proton, hadron-nucleus nucleus-nucleus collisions at the CERN Super Proton Synchrotron. It recorded first physics data with beams 2009 ion (secondary 7Be beams) 2011. has greatly profited from long development of proton sources accelerator chain as well H2 beamline North Area. The latter recently been modified also serve fragment separator needed produce Be for...
The Standard Model of particle physics is still lacking an understanding the generation and nature neutrino masses. A favorite theoretical scenario (the see-saw mechanism) that both Dirac Majorana mass terms are present, leading to existence heavy partners light neutrinos, presumably massive nearly sterile. These neutrinos can be searched for at high energy lepton colliders very luminosity, such as Future electron-positron e+e− Circular Collider, FCC-ee (TLEP), presently studied within...
Measurements of inclusive spectra and mean multiplicities $$\pi ^\pm $$ , K $$^\pm p $${\bar{\text {p}}}$$ produced in inelastic + interactions at incident projectile momenta 20, 31, 40, 80 158 $$\text{ GeV }/c$$ ( $$\sqrt{s} = 6.3, 7.7, 8.8, 12.3 17.3 }$$ respectively) were performed the CERN Super Proton Synchrotron using large acceptance NA61/SHINE hadron spectrometer. Spectra are presented as function rapidity transverse momentum compared to predictions current models. The measurements...
Measurements of hadron production in p + C interactions at 31 GeV/c are performed using the NA61/SHINE spectrometer CERN SPS. The analysis is based on full set data collected 2009 a graphite target with thickness 4 % nuclear interaction length. Inelastic and cross sections as well spectra $$\pi ^{\pm }$$ , $$K^{\pm p, $$K^0_S$$ $$\varLambda $$ measured high precision. These measurements essential for improved calculations initial neutrino fluxes T2K long-baseline oscillation experiment...
Abstract Particle physics has arrived at an important moment of its history. The discovery the Higgs boson completed Standard Model, core theory behind known set elementary particles and fundamental interactions. However, Model leaves questions unanswered, such as nature dark matter, origin matter–antimatter asymmetry in Universe, existence hierarchy neutrino masses. To address these newly discovered boson, high-energy colliders are required. Future generations machines must be versatile,...
The ratio ${R}_{\ensuremath{\nu}}$ of the neutral- to charged-current cross sections neutrinos in iron has been measured an exposure CERN-Dortmund-Heidelberg-Saclay neutrino detector a 160-GeV/c narrow-band beam at CERN Super Proton Synchrotron. result is ${R}_{\ensuremath{\nu}}=0.3072\ifmmode\pm\else\textpm\fi{}0.0025(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.0020(\mathrm{syst})$, for hadronic energy greater than 10 GeV. electroweak mixing parameter...
Measurements of $\ensuremath{\psi}(3097)$ and ${\ensuremath{\psi}}^{\ensuremath{'}}(3686)$ branching fractions for selected hadronic decays are presented. The ratio ${\ensuremath{\psi}}^{\ensuremath{'}}$ to $\ensuremath{\psi}$ these is consistent with the lepton pairs, exception $p\ensuremath{\pi}$ ${K}^{*}K$ which this substantially smaller.
Spectra of positively charged kaons in p+C interactions at 31 GeV/c were measured with the NA61/SHINE spectrometer CERN SPS. The analysis is based on full set data collected 2007 a graphite target thickness 4% nuclear interaction length. Interaction cross sections and pion spectra already using same data. These new measurements combination published ones are required to improve predictions neutrino flux for T2K long baseline oscillation experiment Japan. In particular, knowledge kaon...
We present experimental results on inclusive spectra and mean multiplicities of negatively charged pions produced in inelastic p+p interactions at incident projectile momenta 20, 31, 40, 80 158 GeV/c ( $$\sqrt{s} = $$ 6.3, 7.7, 8.8, 12.3 17.3 GeV, respectively). The measurements were performed using the large acceptance NA61/SHINE hadron spectrometer CERN super proton synchrotron. Two-dimensional are determined terms rapidity transverse momentum. Their properties such as width distributions...
After 10 years of physics at the Large Hadron Collider (LHC), particle landscape has greatly evolved. Today, a staged Future Circular (FCC), consisting luminosity-frontier highest-energy electron–positron collider (FCC-ee) followed by an energy-frontier hadron (FCC-hh), promises most far-reaching program for post-LHC era. FCC-ee will be precision instrument used to study Z, W, Higgs, and top particles, offer unprecedented sensitivity signs new physics. Most infrastructure could reused...
Abstract With its high luminosity, clean experimental conditions, and a range of energies that cover the four heaviest particles known today, FCC-ee offers wealth physics possibilities, with potential for discoveries. The is an essential complementary step towards 100 TeV hadron collider, as such uniquely powerful combined program. This vision backbone 2020 European Strategy Particle Physics. One main challenges now to design systems can, demonstrably, fully exploit these extraordinary opportunities.