A5031952194- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Computational Physics and Python Applications
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Distributed and Parallel Computing Systems
- Nuclear physics research studies
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- Stochastic processes and statistical mechanics
- Advanced Data Storage Technologies
- Medical Imaging Techniques and Applications
- Phase-change materials and chalcogenides
- Markov Chains and Monte Carlo Methods
- Scientific Computing and Data Management
- Cloud Computing and Resource Management
- Advanced Thermoelectric Materials and Devices
- Advancements in Solid Oxide Fuel Cells
- Hydrocarbon exploration and reservoir analysis
- Semiconductor Quantum Structures and Devices
- Geophysics and Gravity Measurements
European Organization for Nuclear Research
2020-2025
École Polytechnique Fédérale de Lausanne
2023
Centre National de la Recherche Scientifique
1994-2022
Université Clermont Auvergne
2020-2022
Laboratoire d'Informatique, de Modélisation et d'Optimisation des Systèmes
2020-2022
Mines Saint-Étienne
2022
Al Akhawayn University
2022
Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara
2021
Carnegie Mellon University
2006
Laboratoire d'Informatique, de Robotique et de Microélectronique de Montpellier
2000
Abstract The standard model of particle physics currently provides our best description fundamental particles and their interactions. theory predicts that the different charged leptons, electron, muon tau, have identical electroweak interaction strengths. Previous measurements shown a wide range decays are consistent with this principle lepton universality. This article presents evidence for breaking universality in beauty-quark decays, significance 3.1 deviations, based on proton–proton...
First evidence of a structure in the J/ψΛ invariant mass distribution is obtained from an amplitude analysis Ξb-→J/ψΛK- decays. The observed consistent with being due to charmonium pentaquark strangeness significance 3.1σ including systematic uncertainties and look-elsewhere effect. Its width are determined be 4458.8±2.9-1.1+4.7MeV 17.3±6.5-5.7+8.0MeV, respectively, where quoted statistical systematic. also two resonances. In addition, narrow excited Ξ- states, Ξ1690- Ξ1820-, seen for first...
Results are reported from an amplitude analysis of the $B^+\to D^+D^-K^+$ decay. The is carried out using LHCb proton-proton collision data taken at $\sqrt{s}=7,8,$ and $13$ TeV, corresponding to a total integrated luminosity 9 fb$^{-1}$. In order obtain good description data, it found be necessary include new spin-0 spin-1 resonances in $D^-K^+$ channel with masses around 2.9 GeV$/c^2$, charmonium resonance proximity spin-2 $\chi_{c2}(3930)$ state. widths these determined, as relative...
We present an angular analysis of the $B^{+}\rightarrow K^{\ast+}(\rightarrow K_{S}^{0}\pi^{+})\mu^{+}\mu^{-}$ decay using 9$\,\mbox{fb}^{-1}$ $pp$ collision data collected with LHCb experiment. For first time, full set CP-averaged observables is measured in intervals dimuon invariant mass squared. Local deviations from Standard Model predictions are observed, similar to those previous analyses isospin-partner $B^{0}\rightarrow K^{\ast0}\mu^{+}\mu^{-}$ decay. The global tension dependent on...
The branching fraction of the rare B_{s}^{0}→ϕμ^{+}μ^{-} decay is measured using data collected by LHCb experiment at center-of-mass energies 7, 8, and 13 TeV, corresponding to integrated luminosities 1, 2, 6 fb^{-1}, respectively. reported in intervals q^{2}, square dimuon invariant mass. In q^{2} region between 1.1 6.0 GeV^{2}/c^{4}, measurement found lie 3.6 standard deviations below a model prediction based on combination light cone sum rule lattice QCD calculations. addition, first...
An improved measurement of the decay B0s→μ+μ− and searches for decays B0→μ+μ− B0s→μ+μ−γ are performed at LHCb experiment using data collected in proton-proton collisions √s=7, 8 13 TeV, corresponding to integrated luminosities 1, 2 6 fb−1, respectively. The branching fraction effective lifetime measured be B(B0s→μ+μ−)=(3.09+0.46+0.15−0.43−0.11)×10−9 τ(B0s→μ+μ−)=(2.07±0.29±0.03) ps, respectively, where uncertainties include both statistical systematic contributions. No significant signal is...
The production of $\chi_{c1}(3872)$ and $\psi(2S)$ hadrons is studied as a function charged particle multiplicity in $pp$ collisions at center-of-mass energy 8 TeV, corresponding to an integrated luminosity 2 fb$^{-1}$. For both states, the fraction that produced promptly collision vertex found decrease increases. ratio cross-sections for particles also with multiplicity, while no significant dependence on observed equivalent away from $b$-hadron decays. This behavior consistent calculation...
Abstract Mesons comprising a beauty quark and strange can oscillate between particle ( $${B}_{\mathrm{s}}^{0}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mrow> <mml:mi>B</mml:mi> </mml:mrow> <mml:mi>s</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:math> ) antiparticle $${\overline{B}}_{\mathrm{s}}^{0}$$ <mml:mover> <mml:mo>¯</mml:mo> </mml:mover> flavour eigenstates, with frequency given by the mass difference heavy light Δ m s . Here we present...
Precise measurements of acoustic attenuation were carried out near the triple point argon, krypton, and xenon. The results obtained eliminate discrepancies in data for bulk viscosity ${\ensuremath{\eta}}_{v}$ simple fluids. value does not vanish solidification ratio $\frac{{\ensuremath{\eta}}_{v}}{{\ensuremath{\eta}}_{s}}$, where ${\ensuremath{\eta}}_{s}$ is shear viscosity, remains low: 0.3-0.5. This result fundamentally different from Enskog theoretical 1.2 but agrees with those given both...
Using $pp$ collision data corresponding to an integrated luminosity of $5.4\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected with the LHCb detector at a center-of-mass energy 13 TeV, ${B}^{0}\ensuremath{\rightarrow}{D}^{\ensuremath{-}}{D}^{+}{K}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ decay is studied. A new excited ${D}_{s}^{+}$ meson observed decaying into ${D}^{+}{K}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ final state large statistical significance. The pole mass and width, spin...
A search for time-dependent violation of the charge-parity symmetry in $D^0 \to K^+ K^-$ and \pi^+ \pi^-$ decays is performed at LHCb experiment using proton-proton collision data recorded from 2015 to 2018 a centre-of-mass energy 13 TeV, corresponding an integrated luminosity 6 fb$^{-1}$. The $D^0$ meson required originate $D^*(2010)^+ D^0 \pi^+$ decay, such that its flavour production identified by charge accompanying pion. slope asymmetry decay rates $\bar{D}^0$ mesons into final states...
The Standard Model of particle physics currently provides our best description fundamental particles and their interactions.The theory predicts that the different charged leptons, electron, muon tau, have identical electroweak interaction strengths.Previous measurements shown a wide range decays are consistent with this principle lepton universality.This article presents evidence for breaking universality in beauty-quark decays, significance 3.1 standard deviations, based on proton-proton...
Abstract A structure is observed in the $${B} ^{\pm }{K} ^{\mp }$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msup> <mml:mi>B</mml:mi> </mml:mrow> <mml:mo>±</mml:mo> </mml:msup> <mml:mi>K</mml:mi> <mml:mo>∓</mml:mo> </mml:math> mass spectrum a sample of proton–proton collisions at centre-of-mass energies 7, 8, and 13 TeV, collected with LHCb detector corresponding to total integrated luminosity 9 $$\,\text {fb} ^{-1}$$ <mml:mspace /> <mml:mtext>fb</mml:mtext>...
A measurement of the $C\phantom{\rule{0}{0ex}}P$-violating asymmetry in a charged B meson K$\ensuremath{\pi}$ decay disagrees with that neutral decay, though they should be equal by isospin symmetry.
This paper presents an analysis of the $\Lambda^0_b\rightarrow J/\psi\Lambda$ angular distribution and transverse production polarisation $\Lambda^0_b$ baryons in proton-proton collisions at centre-of-mass energies 7, 8 13 TeV. The measurements are performed using data corresponding to integrated luminosity 4.9 fb$^{-1}$, collected with LHCb experiment. is determined a fiducial region momentum pseudorapidity $1 < p_{T} 20$ GeV$/c$ $2 \eta 5$, respectively. consistent being produced...
A measurement of the $CP$ asymmetry in ${D}^{0}\ensuremath{\rightarrow}{K}_{\mathrm{S}}^{0}{K}_{\mathrm{S}}^{0}$ decays is reported, based on a data sample proton-proton collisions collected by LHCb experiment from 2015 to 2018, corresponding an integrated luminosity $6\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. The flavor ${D}^{0}$ candidate determined using charge ${D}^{*\ifmmode\pm\else\textpm\fi{}}$ meson, which decay required originate....
The relative branching fractions of ${B}^{+}\ensuremath{\rightarrow}{h}^{+}{h}^{\ensuremath{'}+}{h}^{\ensuremath{'}\ensuremath{-}}$ decays, where ${h}^{(\ensuremath{'})}$ is a pion or kaon, are measured. analysis performed with data sample, collected the LHCb detector, corresponding to an integrated luminosity $3.0\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ $pp$ collisions. results obtained improve significantly on previous measurements these quantities, and important for interpretation...
Abstract A branching fraction measurement of the $${{B} ^0} {\rightarrow }{{D} ^+_{s}} {{\pi } ^-} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msup> <mml:mi>B</mml:mi> </mml:mrow> <mml:mn>0</mml:mn> </mml:msup> <mml:mo>→</mml:mo> <mml:msubsup> <mml:mi>D</mml:mi> <mml:mi>s</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mi>π</mml:mi> <mml:mo>-</mml:mo> </mml:math> decay is presented using proton–proton collision data collected with LHCb experiment,...
A bstract The inclusive $$ b\overline{b} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>b</mml:mi><mml:mover><mml:mi>b</mml:mi><mml:mo>¯</mml:mo></mml:mover></mml:math> - and c\overline{c} xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>c</mml:mi><mml:mover><mml:mi>c</mml:mi><mml:mo>¯</mml:mo></mml:mover></mml:math> -dijet production cross-sections in the forward region of pp collisions are measured using a data sample collected with LHCb detector at centre-of-mass...