T. Mahmoud
A5005201526- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Service-Oriented Architecture and Web Services
- Radiation Detection and Scintillator Technologies
- Dark Matter and Cosmic Phenomena
- Business Process Modeling and Analysis
- Big Data and Business Intelligence
- Semantic Web and Ontologies
- Nuclear reactor physics and engineering
- Nuclear Physics and Applications
- Superconducting Materials and Applications
- Sustainable Industrial Ecology
- Computational Physics and Python Applications
- Green IT and Sustainability
- Medical Imaging Techniques and Applications
- Collaboration in agile enterprises
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- Water Quality Monitoring and Analysis
- Advanced Surface Polishing Techniques
- Corporate Governance and Management
- Analytical Chemistry and Sensors
- Advanced machining processes and optimization
University of Bonn
2019-2024
GSI Helmholtz Centre for Heavy Ion Research
2019-2024
University of Giessen
2014-2023
A. Alikhanyan National Laboratory
2021-2022
Carl von Ossietzky Universität Oldenburg
2010-2022
University of Ha'il
2022
Institut Pluridisciplinaire Hubert Curien
2021
LIP - Laboratory of Instrumentation and Experimental Particle Physics
2021
Slovak Academy of Sciences
2018-2019
Institute of Physics of the Slovak Academy of Sciences
2018-2019
The Compact Muon Solenoid (CMS) detector is described. operates at the Large Hadron Collider (LHC) CERN. It was conceived to study proton-proton (and lead-lead) collisions a centre-of-mass energy of 14 TeV (5.5 nucleon-nucleon) and luminosities up 1034 cm−2 s−1 (1027 s−1). At core CMS sits high-magnetic-field large-bore superconducting solenoid surrounding an all-silicon pixel strip tracker, lead-tungstate scintillating-crystals electromagnetic calorimeter, brass-scintillator sampling hadron...
CMS is a general purpose experiment, designed to study the physics of pp collisions at 14 TeV Large Hadron Collider (LHC). It currently involves more than 2000 physicists from 150 institutes and 37 countries. The LHC will provide extraordinary opportunities for particle based on its unprecedented collision energy luminosity when it begins operation in 2007.
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 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...
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...
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>...
We present data on charged kaons (K+-) and {\phi} mesons in Au(1.23A GeV)+Au collisions. It is the first simultaneous measurement of K central heavy-ion collisions below a kinetic beam energy 10A GeV. The {\phi}/K- multiplicity ratio found to be surprisingly high with value 0.52 +- 0.16 shows no dependence centrality collision. Consequently, different slopes K+ K- transverse-mass spectra can explained solely by feed- down, which substantially softens mesons. Hence, contrast commonly adapted...
We present first data on sub-threshold production of K0 s mesons and Λ hyperons in Au+Au collisions at $\sqrt{s_{NN}}$ = 2.4 GeV. observe an universal scaling hadrons containing strangeness, independent their corresponding thresholds. Comparing the yields, scaling, shapes rapidity pt spectra to state-of-the-art transport model (UrQMD, HSD, IQMD) predictions, we find that none latter can simultaneously describe all observables with reasonable \c{hi}2 values.
There are many possibilities for new physics beyond the Standard Model that feature non-standard Higgs sectors. These may introduce sources of CP violation, and there be mixing between multiple bosons or other scalar bosons. Alternatively, a composite state, even no at all. scenarios have important implications collider as well cosmology, understanding their phenomenology is essential full comprehension electroweak symmetry breaking. This report discusses most relevant theories which go its...
We report on the first measurement of $p\mathrm{\ensuremath{\Lambda}}$ and $pp$ correlations via femtoscopy method in $p$ + Nb reactions at $\sqrt{{s}_{\mathit{NN}}}=3.18\phantom{\rule{0.28em}{0ex}}\mathrm{GeV}$, studied with High Acceptance Di-Electron Spectrometer (HADES). By comparing experimental correlation function to model calculations, a source size for pairs...
We present the first observation of K^{-} and ϕ absorption within nuclear matter by means π^{-}-induced reactions on C W targets at an incident beam momentum 1.7 GeV/c studied with HADES SIS18/GSI. The double ratio (K^{-}/K^{+})_{W}/(K^{-}/K^{+})_{C} is found to be 0.319±0.009(stat)_{-0.012}^{+0.014}(syst) indicating a larger in heavier as compared lighter ones. measured ϕ/K^{-} ratios π^{-}+C π^{-}+W acceptance are equal 0.55±0.04(stat)_{-0.07}^{+0.06}(syst)...
We report on the investigation of $\mathrm{\ensuremath{\Delta}}$(1232) production and decay in proton-proton collisions at a kinetic energy 1.25 GeV measured with HADES. Exclusive dilepton channels $pp{e}^{+}{e}^{\ensuremath{-}}$ $pp{e}^{+}{e}^{\ensuremath{-}}\ensuremath{\gamma}$ have been studied compared partial-wave analysis hadronic $pp{\ensuremath{\pi}}^{0}$ channel. They allow to access both...
We present high-statistic data on charged pion emission from Au+Au collisions at $\sqrt{s_{\rm{NN}}}$ = 2.4 GeV (corresponding to $E_{beam}$ 1.23 A GeV) in four centrality classes the range 0 - 40$\%$ of most central collisions. The are analyzed as a function transverse momentum, mass, rapidity, and polar angle. Pion multiplicity per participating nucleon decreases moderately with increasing centrality. angular distributions found be non-isotropic even for event class. Our results fit well...
High-statistics $\pi^-\pi^-$ and $\pi^+\pi^+$ femtoscopy data are presented for Au+Au collisions at $\sqrt{s_\mathrm{NN}}=2.4$ GeV, measured with HADES SIS18/GSI. The experimental correlation functions allow the determination of space-time extent corresponding emission sources via a comparison to models. source, parametrized as three-dimensional Gaussian distribution, is studied in dependence on pair transverse momentum, azimuthal angle respect reaction plane, collision centrality beam...
Traditional EA concepts in the Enterprise Application Integration (EAI) domain focus on ex-post integration of application interfaces by pipelining different middleware technologies like message queuing or remote method invocations [1, 2]. Web Service enabled Service-Oriented Architectures (SOAs) used EAI context were a step towards providing an abstraction layer for involved using Description Language (WSDL). The idea SOA enlarges applying Semantic Services (SWS) technology to it. OWL-S and...
We investigate identical pion HBT intensity interferometry in central Au + collisions at 1.23A GeV. High-statistics π−π− and π+π+ data are measured with HADES SIS18/GSI. The radius parameters, derived from the correlation function depending on relative momenta longitudinally comoving system parametrized as three-dimensional Gaussian distribution, studied of transverse momentum. A substantial charge-sign difference source radii is found, particularly pronounced low extracted parameters agree...
Pion-induced reactions provide unique opportunities for an unambiguous description of baryonic resonances and their coupling channels by means a partial-wave analysis. Using the secondary pion beam at SIS18, two-pion production in second resonance region has been investigated to unravel role $N(1520){\frac{3}{2}}^{\ensuremath{-}}$resonance intermediate $\ensuremath{\rho}$-meson production. Results on exclusive with one (${\ensuremath{\pi}}^{\ensuremath{-}}p$) two pions...
A multitude of heterogeneous data must be converted to environmental-conscious information and kept ready by Corporate Environmental Management Information Systems (CEMIS) support environmental protection, sustainability, energy efficiency within companies. Since these systems are currently not applying strategic decision support, contemporary do cope with requirements from the sustainability discussion. Early identification cause-and-effect-relationships is vitally important able anticipate...
We report on the investigation of dielectron production in tagged quasi-free neutron-proton collisions by using a deuteron beam kinetic energy 1.25GeV/u impinging liquid hydrogen target. Our measurements with HADES confirm significant excess $e^{+}e^{-}$ pairs above $\pi^{0}$ mass exclusive channel $dp \rightarrow npe^{+}e^{-}(p_{spect})$ as compared to $ ppe^{+}e^{-}$ measured proton-proton at same energy. That points different bremsstrahlung mechanisms. Two models were evaluated for role...
The current work presents a new approach for designing business intelligence solutions. In the Era of Big Data, former and robust analytical concepts utilities need to adapt themselves changed market circumstances. main focus this is address acceleration building process “data-centric” Business Intelligence (BI) solution besides preparing BI solutions Data utilization. This research addresses following goals: reducing time spent during solution’s design phase; achieving flexibility by adding...
The inclusive production of {\Lambda} hyperons in proton-proton collisions at $\sqrt{s}$ = 3.18 GeV was measured with HADES the GSI Helmholtzzentrum f\"ur Schwerionenforschung Darmstadt. experimental data are compared to a data-based model for individual exclusive channels same reaction. contributions intermediate resonances such as {\Sigma}(1385), {\Delta}++ or N* considered detail. In particular, result partial wave analysis is accounted abundant pK$^+${\Lambda} final state. Model and show...
The HADES collaboration uses the e + − production as a probe of resonance matter produced in collisions at incident energies 1-3.5 GeV/nucleon GSI. Elementary reactions provide useful references for these studies and give information on Dalitz decays (R→Ne ). Such processes are sensitive to structure time-like electromagnetic baryon transitions kinematic range where (off-shell) vector mesons play crucial role. Results obtained proton-proton commissioning pion-beam experiment reported...