C. Lourenço
A5035781582- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Radiation Detection and Scintillator Technologies
- Medical Imaging Techniques and Applications
- Nuclear reactor physics and engineering
- Radiation Effects in Electronics
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Nuclear physics research studies
- Superconducting Materials and Applications
- Astrophysics and Cosmic Phenomena
- Distributed and Parallel Computing Systems
- Silicon and Solar Cell Technologies
- Black Holes and Theoretical Physics
- Cold Atom Physics and Bose-Einstein Condensates
- Gamma-ray bursts and supernovae
- Statistical Methods and Bayesian Inference
- Muon and positron interactions and applications
- Particle accelerators and beam dynamics
European Organization for Nuclear Research
2016-2025
A. Alikhanyan National Laboratory
2022-2024
University of Antwerp
2024
Institute of High Energy Physics
2013-2024
Instituto Nacional de Saúde
2024
Istituto Nazionale di Fisica Nucleare, Sezione di Torino
2002-2016
Centre National de la Recherche Scientifique
1996-2011
Brookhaven College
2011
Brookhaven National Laboratory
2011
Gettysburg College
2011
The summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,717 new measurements 869 papers, we list, evaluate, average measured properties gauge bosons the recently discovered Higgs boson, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle search limits are listed in Summary Tables. give numerous tables, figures, formulae, reviews topics...
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...
We report on a precision measurement of low-mass muon pairs in 158 AGeV indium-indium collisions at the CERN SPS. A significant excess is observed above yield expected from neutral meson decays. The unprecedented sample size 360 000 dimuons and good mass resolution about 2% allow us to isolate by subtraction decay sources. shape resulting spectrum consistent with dominant contribution...
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).
We highlight issues which are often underestimated in the experimental analyses on quarkonium polarization: relation between parameters of angular distributions and momentum composition quarkonium, importance choice reference frame, interplay observed decay production kinematics, consequent influence acceptance comparison measurements theoretical calculations. Given puzzles raised by available results, new must provide more detailed information, such that physical conclusions can be derived...
The NA60 experiment at the CERN SPS has studied low-mass muon pairs in 158A GeV In-In collisions. mass and pT spectra associated with peripheral collisions can quantitatively be described by known neutral meson decays. high data quality allowed to remeasure electromagnetic transition form factors of Dalitz decays η-> μ^+μ^-γand ω-> μ^+μ^-π^0. Using usual pole approximation F = (1-M_{μμ}^{2}/Λ^{2})^{-1} for factors, we find Λ^{-2} (in GeV^{-2}) 1.95+-0.17(stat.)+-0.05(syst.) ηand...
Polarization measurements are usually considered as the most difficult challenge for QCD description of quarkonium production. In fact, global data fits determination non-perturbative parameters bound-state formation traditionally exclude polarization observables and use them a posteriori verifications predictions, with perplexing results. With change perspective, we move to centre study, advocating that they actually provide strongest fundamental indications about production mechanisms,...
The NA60 experiment studies muon pair production at the CERN Super Proton Synchrotron. In this Letter we report on a precision measurement of J/ψ in In-In collisions. We have studied centrality distribution, and compared it with one expected if absorption cold nuclear matter were only active suppression mechanism. For collisions involving more than ∼80 participant nucleons, find that an extra is present. This result qualitative agreement previous Pb-Pb measurements by NA50 experiment, but no...
The NA60 experiment at the CERN SPS has studied low-mass dimuon production in 158A GeV In-In collisions. An excess of pairs above known meson decays been reported before. We now present precision results on associated transverse momentum spectra. slope parameter Teff extracted from spectra rises with mass up to ρ, followed by a sudden decline above. While initial rise is consistent expectations for radial flow hadronic decay source, signals transition an emission source much smaller flow....
The NA60 experiment at the CERN SPS has measured muon pairs with unprecedented precision in 158A GeV In-In collisions. A strong excess of above known sources is observed whole mass region 0.2 rho -> mu+mu- annihilation. associated spectral function shows a broadening, but essentially no shift mass. For M>1 GeV, found to be prompt, not due enhanced charm production, pronounced differences Drell-Yan pairs. slope parameter Teff transverse momentum spectra rises up rho, followed by sudden...
The NA60 experiment studied low-mass muon pair production in proton–nucleus (p–A) collisions using a 400 GeV proton beam at the CERN SPS. dimuon spectrum is well described by superposition of two-body and Dalitz decays light neutral mesons η, ρ, ω, η′ ϕ, no evidence in-medium effects found. A new high-precision measurement electromagnetic transition form factors η ω was performed, profiting from 10 times larger data sample than peripheral In–In previously collected NA60. Using...
Último retrato é uma canção de Dinorá Carvalho e Maria Antonia cujas fontes documentais não haviam sido localizadas até 2023. Os objetivos específicos deste artigo são: contextualizar as informações sobre a criação desta em suas versões camerística orquestral; relatar o processo localização das musicais; comentar estratégia composicional empregada; publicar edição da partitura sua versão camerística. A metodologia empregada para análise dos contextos foi Análise Documental. Já musical...
The covariance properties of angular momentum eigenstates imply the existence a rotation-invariant relation among parameters difermion decay distribution inclusively observed vector mesons. This is generalization Lam-Tung identity, result specific to Drell-Yan production in perturbative QCD, here shown be equivalent dynamical condition that dilepton always produced transversely polarized with respect quantization axes belonging plane.
Significant progress in understanding quarkonium production requires improved polarization measurements, fully considering the intrinsic multidimensionality of problem. We propose a frame-invariant formalism which minimizes dependence measured result on experimental acceptance, facilitates comparison with theoretical calculations, and provides much needed control over systematic effects due to detector limitations analysis biases. This is direct generic consequence rotational invariance...