A5107862556- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Particle Accelerators and Free-Electron Lasers
- Computational Physics and Python Applications
- Medical Imaging Techniques and Applications
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Nuclear physics research studies
- Distributed and Parallel Computing Systems
- Stochastic processes and statistical mechanics
- Radiation Detection and Scintillator Technologies
- Advanced NMR Techniques and Applications
- Astrophysics and Cosmic Phenomena
- Laser Material Processing Techniques
- Advanced Surface Polishing Techniques
- Advanced Data Storage Technologies
- Silicon Nanostructures and Photoluminescence
- Quantum, superfluid, helium dynamics
- Pulsars and Gravitational Waves Research
Centre National de la Recherche Scientifique
2016-2025
Aix-Marseille Université
2016-2025
Centre de physique des particules de Marseille
2009-2025
Google (United States)
2023-2025
European Organization for Nuclear Research
1998-2023
École Polytechnique Fédérale de Lausanne
2023
Instituto de Física Corpuscular
2023
Universitat de València
2023
University of Zurich
2010-2023
Kharkiv Institute of Physics and Technology
2023
The LHCb experiment is dedicated to precision measurements of CP violation and rare decays B hadrons at the Large Hadron Collider (LHC) CERN (Geneva). initial configuration expected performance detector associated systems, as established by test beam simulation studies, described.
This paper presents the design of LHCb trigger and its performance on data taken at LHC in 2011. A principal goal is to perform flavour physics measurements, designed distinguish charm beauty decays from light quark background. Using a combination lepton identification measurements particles' transverse momenta selects particles originating hadrons, which typically fly finite distance before decaying. The reduces roughly 11 MHz bunch-bunch crossings that contain least one inelastic pp...
The production of J/psi mesons in proton-proton collisions at sqrt(s)=7 TeV is studied with the LHCb detector LHC. differential cross-section for prompt measured as a function transverse momentum pT and rapidity y fiducial region 0<pT<14 GeV/c 2.0<y<4.5. fraction from b-hadron decays are also same ranges. analysis based on data sample corresponding to an integrated luminosity 5.2pb-1. cross-sections over 10.52 +/- 0.04 1.40 +1.64/-2.20 mub 1.14 0.01 0.16 decays, where first uncertainty...
Engineered dissipative reservoirs have the potential to steer many-body quantum systems toward correlated steady states useful for simulation of high-temperature superconductivity or magnetism. Using up 49 superconducting qubits, we prepared low-energy transverse-field Ising model through coupling auxiliary qubits. In one dimension, observed long-range correlations and a ground-state fidelity 0.86 18 qubits at critical point. two dimensions, found mutual information that extends beyond...
Abstract Understanding how interacting particles approach thermal equilibrium is a major challenge of quantum simulators 1,2 . Unlocking the full potential such systems towards this goal requires flexible initial state preparation, precise time evolution and extensive probes for final characterization. Here we present simulator comprising 69 superconducting qubits that supports both universal gates high-fidelity analogue evolution, with performance beyond reach classical simulation in...
Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, hadronic decay Bs -> J/psi f0(980) is observed. This CP eigenstate mode could be used to measure mixing-induced violation B_s system. fit pi+ pi- mass spectrum interfering resonances gives R_{f0/phi} = [Gamma(Bs f0, f0 pi-)]/[Gamma(Bs phi, phi K+K-)] 0.252^{+0.046+0.027}_{-0.032-0.033}, where uncertainties are statistical and systematic, respectively.
Engineered dissipative reservoirs have the potential to steer many-body quantum systems toward correlated steady states useful for simulation of high-temperature superconductivity or magnetism. Using up 49 superconducting qubits, we prepared low-energy transverse-field Ising model through coupling auxiliary qubits. In one dimension, observed long-range correlations and a ground-state fidelity 0.86 18 qubits at critical point. two dimensions, found mutual information that extends beyond...
A study of $B_c^+\to K^+K^-\pi^+$ decays is performed for the first time using data corresponding to an integrated luminosity 3.0 $\mathrm{fb}^{-1}$ collected by LHCb experiment in $pp$ collisions at centre-of-mass energies $7$ and $8$ TeV. Evidence decay $B_c^+\to\chi_{c0}(\to K^+K^-)\pi^+$ reported with a significance 4.0 standard deviations, resulting measurement $\frac{\sigma(B_c^+)}{\sigma(B^+)}\times\mathcal{B}(B_c^+\to\chi_{c0}\pi^+)$ be $(9.8^{+3.4}_{-3.0}(\mathrm{stat})\pm...
For the physics program of CMS experiment at LHC to be carried out successfully, excellent electromagnetic calorimetry is required. Given thermal properties ECAL, keeping constant term energy resolution below 0.5% needs its temperature stabilized 18/spl deg/C within 0.05/spl deg/C. A prototype module ECAL with final cooling system has been tested CERN check integration read-out electronics and verify that it complies severe requirements. The performance reported here.
Thermal management is one of the main challenges in most demanding detector technologies and for future microelectronics. Microfluidic cooling has been proposed as a fully integrated solution to heat dissipation problem modern high-power Traditional manufacturing silicon-based microfluidic devices involves advanced, mask-based lithography techniques surface patterning. The limited availability such facilities prevents widespread development use. We demonstrate relevance maskless laser...
The parameters of the beam spot produced by LHC in ATLAS interaction region are computed online using High Level Trigger (HLT) system. high rate triggered events is exploited to make precise measurements position, size and orientation luminous near real-time, as these change significantly even during a single data-taking run. We present challenges, solutions results for determination, monitoring feedback system ATLAS. A specially designed algorithm, which uses tracks registered silicon...
Silicon-based microchannel technology offers unmatched performances for cooling high energy physics silicon-pixels detectors. Although Si-Si direct bonding, used the fabrication of plates, meets stringent requirements this application, in particular high-pressure resistance (~200 bar), it is reported to be a challenging and expensive process. In work, we have evaluated two alternative bonding methods towards more cost-effective process: Si-Glass-Si anodic (AB) with thin-film glass Au-Au...
Silicon-based microchannel technology offers unmatched performance in the cooling of silicon pixel detectors high-energy physics. Although Si-Si direct bonding, used for fabrication plates, also meets stringent requirements this application (its high-pressure resistance ~200 bar, particular), its use is reported to be a challenging and expensive process. In study, we evaluated two alternative bonding methods, aiming toward more cost-effective process: Si-Glass-Si anodic (AB) with thin-film...