A5035886908- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Atomic and Subatomic Physics Research
- Dark Matter and Cosmic Phenomena
- Medical Imaging Techniques and Applications
- CCD and CMOS Imaging Sensors
- Nuclear Physics and Applications
- Astrophysics and Cosmic Phenomena
- Plasma Diagnostics and Applications
- Neutrino Physics Research
- Radiation Therapy and Dosimetry
- Nuclear physics research studies
- Photocathodes and Microchannel Plates
- Semiconductor materials and devices
- Advanced Radiotherapy Techniques
- Radiation Effects in Electronics
- Electron and X-Ray Spectroscopy Techniques
- Ion-surface interactions and analysis
- Magnetic confinement fusion research
- X-ray Spectroscopy and Fluorescence Analysis
- Respiratory Support and Mechanisms
- Analytical Chemistry and Sensors
LIP - Laboratory of Instrumentation and Experimental Particle Physics
2016-2025
University of Coimbra
2016-2025
Polytechnic Institute of Coimbra
2014-2024
Centre National de la Recherche Scientifique
2019
Université Paris-Sud
2019
Slovak Academy of Sciences
2017-2019
Institute of Physics of the Slovak Academy of Sciences
2017-2019
Institut National de Physique Nucléaire et de Physique des Particules
2019
Institut de Physique
2019
Université Paris-Saclay
2019
Abstract SND@LHC is a compact and stand-alone experiment designed to perform measurements with neutrinos produced at the LHC in pseudo-rapidity region of 7.2 < η 8.4. The located 480 m downstream ATLAS interaction point, TI18 tunnel. detector composed hybrid system based on an 830 kg target made tungsten plates, interleaved emulsion electronic trackers, also acting as electromagnetic calorimeter, followed by hadronic calorimeter muon identification system. able distinguish interactions...
We present phase space distributions and multiplicities of K+, K−, ϕ mesons produced in Ar+KCl reactions at a kinetic beam energy 1.756 GeV/nucleon measured with the HADES spectrometer. The inverse slope parameters yields kaons supplement systematics previous measurements. percentage K− coming from decay is found to be 18±7%.6 MoreReceived 9 March 2009DOI:https://doi.org/10.1103/PhysRevC.80.025209©2009 American Physical Society
We present transverse momentum spectra, rapidity distribution and multiplicity of $ \Lambda$ -hyperons measured with the HADES spectrometer in reaction Ar(1.76AGeV) + KCl . The yield \Xi^{{-}}_{}$ is calculated from our previously reported /( \Sigma^{{0}}_{}$ ) ratio compared to other strange particle multiplicities. Employing a strangeness balance equation multiplicities yet unmeasured \Sigma^{{\pm}}_{}$ can be estimated. Finally statistical hadronization model used fit yields \pi^{-}_{}$ ,...
We report first results on a deep subthreshold production of the doubly strange hyperon Xi;{-} in heavy-ion reaction. At beam energy 1.76A GeV reaction Ar + KCl was studied with High Acceptance Di-Electron Spectrometer at SIS18/GSI. A high-statistics and high-purity Lambda sample collected, allowing for investigation decay channel --> Lambdapi;{-}. The deduced Xi;{-}/(Lambda Sigma;{0}) ratio (5.6 +/- 1.2_{-1.7};{+1.8}) x 10;{-3} is significantly larger than available model predictions.
We present a search for the e+e− decay of hypothetical dark photon, also named U vector boson, in inclusive dielectron spectra measured by HADES p(3.5 GeV) + p, Nb reactions, as well Ar (1.756 GeV/u) KCl reaction. An upper limit on kinetic mixing parameter squared ϵ2 at 90% CL has been obtained mass range MU=0.02–0.55 GeV/c2 and is compared with world data set. For masses 0.03–0.1 GeV/c2, lowered respect to previous results, allowing now exclude large part region favored muon g−2 anomaly....
A bstract Heavy Neutral Leptons (HNLs) are hypothetical particles predicted by many extensions of the Standard Model. These can, among other things, explain origin neutrino masses, generate observed matter-antimatter asymmetry in Universe and provide a dark matter candidate. The SHiP experiment will be able to search for HNLs produced decays heavy mesons travelling distances ranging between $$ \mathcal{O} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>O</mml:mi>...
Employing the Bonn–Gatchina partial wave analysis framework (PWA), we have analyzed HADES data of reaction p(3.5GeV)+p→pK+Λ. This might contain information about kaonic cluster "ppK−" (with quantum numbers JP=0− and total isospin I=1/2) via its decay into pΛ. Due to interference effects in our coherent description data, a hypothetical K‾NN (or, specifically "ppK−") signal need not necessarily show up as pronounced feature (e.g. peak) an invariant mass spectrum like Our PWA includes variety...
We present an analysis of proton number fluctuations in $\sqrt{s_{NN}}$ = 2.4 GeV Au+Au collisions measured with the High-Acceptance DiElectron Spectrometer (HADES) at GSI. With help extensive detector simulations done IQMD transport model events including nuclear clusters, various nuisance effects influencing observed cumulants have been investigated. Acceptance and efficiency corrections applied as a function fine grained rapidity transverse momentum bins, well considering local track...
We present the transverse momentum spectra and rapidity distributions of ${\ensuremath{\pi}}^{\ensuremath{-}}$ ${\mathrm{K}}_{S}^{0}$ in Ar $+$ KCl reactions at a beam kinetic energy $1.756$ $A$ GeV measured with High Acceptance Di-Electron Spectrometer (HADES). The reconstructed sample is characterized by good event statistics for wide range rapidity. compare experimental to predictions Isospin Quantum Molecular Dynamics (IQMD) model. model calculations show that low momenta constitute...
We report measurements of electron pair production in elementary p+p and d+p reactions at 1.25 GeV/u with the HADES spectrometer. For first time, pairs were reconstructed for n+p by detecting proton spectator from deuteron breakup. find that yield invariant mass Me+e- > 0.15 GeV/c2 is about an order magnitude larger as compared to p+p. A comparison model calculations demonstrates mechanism not sufficiently described yet. The spectra measured C+C are compatible a superposition collisions,...
We present results on dielectron production in ${}^{40}\mathrm{Ar}+\mathrm{KCl}$ collisions at 1.76$A$ GeV. For the first time $\ensuremath{\omega}$ mesons could be reconstructed a heavy-ion reaction bombarding energy which is well below threshold free nucleon-nucleon collisions. The multiplicity has been extracted and compared to yields of other particles, particular $\ensuremath{\varphi}$ meson. At intermediate ${e}^{+}{e}^{\ensuremath{-}}$ invariant masses, we find strong enhancement pair...
We present an analysis of the Lambda(1405) resonance produced in reaction p+p->Sigma^{pm}+pi^{mp}+K+p at 3.5 GeV kinetic beam energy measured with HADES GSI. The two charged decay channels -> Sigma^{\pm}+pi^{\mp} have been reconstructed for first time p+p collisions. efficiency and acceptance-corrected spectral shapes show a peak position clearly below 1400 MeV/c^2. find total production cross section sigma_{Lambda(1405)}=9.2 +- 0.9 0.7 +3.3-1.0 mub. its polar angle distribution suggests...
Flow coefficients $v_{n}$ of the orders $n = 1 - 6$ are measured with High-Acceptance DiElectron Spectrometer (HADES) at GSI for protons, deuterons and tritons as a function centrality, transverse momentum rapidity in Au+Au collisions $\sqrt{s_{NN}} 2.4$ GeV. Combining information from flow all allows to construct first time, collision energies few GeV, multi-differential picture angular emission pattern these particles. It reflects complicated interplay between effect central fireball...
This paper presents a fast approach to simulating muons produced in interactions of the SPS proton beams with target SHiP experiment. The experiment will be able search for new long-lived particles 400 GeV/c beam dump and which travel distances between fifty metres tens kilometers. detector needs operate under ultra-low background conditions requires large simulated samples muon induced processes. Through use Generative Adversarial Networks it is possible emulate simulation interaction...
The Search for Hidden Particles (SHiP) Collaboration has shown that the CERN SPS accelerator with its 400 GeV/c proton beam offers a unique opportunity to explore Sector [1–3]. proposed experiment is an intensity frontier which capable of searching hidden particles through both visible decays and scattering signatures from recoil electrons or nuclei. high-intensity experimental facility developed by SHiP based on number key features developments provide possibility probing large part...
Abstract The Search for Hidden Particles (SHiP) Collaboration has proposed a general-purpose experimental facility operating in beam-dump mode at the CERN SPS accelerator to search light, feebly interacting particles. In baseline configuration, SHiP experiment incorporates two complementary detectors. upstream detector is designed recoil signatures of light dark matter (LDM) scattering and neutrino physics, particular with tau neutrinos. It consists spectrometer magnet housing layered system...
The global polarization of {\Lambda} hyperons along the total orbital angular momentum a relativistic heavy-ion collision is presented based on high statistics data samples collected in Au+Au collisions at \sqrt{s_{NN}} = 2.4 GeV and Ag+Ag 2.55 with High-Acceptance Di-Electron Spectrometer (HADES) GSI, Darmstadt. This first measurement below strangeness production threshold nucleon-nucleon collisions. Results are reported as function centrality well hyperon transverse (p_T) rapidity (y_{CM})...
We present the inclusive invariant-mass, transverse momentum and rapidity distributions of dielectrons (e$^{+}$e$^{-}$ pairs) in p+p interactions at 3.5 GeV beam kinetic energy. In vector-meson mass region, a distinct peak corresponding to direct $\omega$ decays is reconstructed with 2% resolution. The data compared predictions from three model calculations. Due large acceptance HADES apparatus for $e^{+}e^{-}$ invariant masses above 0.2 GeV/$c^{2}$ pair momenta p$_{t}$ $ <$ 1 GeV/$c$,...
Abstract High-precision measurements of flow coefficients $$v_{n}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>v</mml:mi> <mml:mi>n</mml:mi> </mml:msub> </mml:math> ( $$n = 1 - 4$$ <mml:mrow> <mml:mo>=</mml:mo> <mml:mn>1</mml:mn> <mml:mo>-</mml:mo> <mml:mn>4</mml:mn> </mml:mrow> ) for protons, deuterons and tritons relative to the first-order spectator plane have been performed in Au+Au collisions at $$\sqrt{s_{_{{\text {NN}}}}}= 2.4$$ <mml:msqrt>...
In this work we explore readout architectures for the simultaneous high-resolution timing and bidimensional tracking of charged particles with Resistive Plate Chambers (TOF-tracker) accurate detection gamma rays PET imaging. On 625 $cm^2$ active area obtained a time resolution 61 ps $\sigma$ position below 150 $\mu$m from cosmic rays. An intrinsic precision 0.49 mm FWHM was determined localization small $\beta^+$ source via its annihilation radiation.