C. Kourkoumelis
A5102947963- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Neutrino Physics Research
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Black Holes and Theoretical Physics
- Distributed and Parallel Computing Systems
- Medical Imaging Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- Muon and positron interactions and applications
- Advanced Data Storage Technologies
- Particle accelerators and beam dynamics
- Algorithms and Data Compression
- Superconducting Materials and Applications
- advanced mathematical theories
- Nuclear physics research studies
- Big Data Technologies and Applications
- Scientific Research and Discoveries
- Nuclear reactor physics and engineering
National and Kapodistrian University of Athens
2016-2025
AGH University of Krakow
2013-2024
Jagiellonian University
2017-2024
SR Research (Canada)
2024
Federación Española de Enfermedades Raras
2024
Atlas Scientific (United States)
2024
A. Alikhanyan National Laboratory
2024
Oxford University Press (United Kingdom)
2024
The University of Adelaide
2014-2023
Istituto Nazionale di Fisica Nucleare, Sezione di Pavia
2019-2023
We report on the measurement of γp→J/ψp cross section from E_{γ}=11.8 GeV down to threshold at 8.2 using a tagged photon beam with GlueX experiment. find that total falls toward less steeply than expected two-gluon exchange models. The differential dσ/dt has an exponential slope 1.67±0.39 GeV^{-2} 10.7 average energy. LHCb pentaquark candidates P_{c}^{+} can be produced in s channel this reaction. see no evidence for them and set model-dependent upper limits their branching fractions...
We report the total and differential cross sections for $J/\psi$ photoproduction with large acceptance GlueX spectrometer photon beam energies from threshold at 8.2~GeV up to 11.44~GeV over full kinematic range of momentum transfer squared, $t$. Such coverage facilitates extrapolation forward ($t = 0$) point beyond physical region. The section is used by many theoretical models plays an important role in understanding its relation $J/\psi-$proton interaction. These measurements near are also...
The production of the Jψ resonance in 125-GeV/c p¯ and φ− interactions with Be, Cu, W targets has been measured. cross section per nucleon for is suppressed relative to lighter targets, especially at large values Feynman x, which opposite expectation from various explanations European Muon Collaboration effect. Models incorporating modifications gluon structure functions heavy show qualitative agreement data.Received 14 December 1987DOI:https://doi.org/10.1103/PhysRevLett.60.2121©1988...
The production of the χ1 and χ2 states charmonium has been observed in 300 GeV/c π±N pN interactions. fraction total inclusive J/ψ due to radiative χ decay determined be 0.40±0.04, 0.37±0.03, 0.30±0.04 for π+, π−, proton data, respectively. Total cross sections have obtained 131±18±14 188±30±21 nb/nucleon π−N interactions production. By measuring contributions both ψ’ decay, direct 97±14, 102±14, 89±12 protons, respectively.Received 21 October...
This chapter of the "Flavor in era LHC" workshop report discusses flavor-related issues production and decays heavy states at LHC high momentum transfer Q, both from experimental theoretical perspective. We review top quark physics, discuss flavor aspects several extensions standard model, such as supersymmetry, little Higgs models or with extra dimensions. includes discovery aspects, well measurement properties these states. also present publicly available computational tools related to this topic.
We measure for the first time differential photoproduction cross section $d\sigma/dt$ of $a_2(1320)$ meson at an average photon beam energy 8.5~GeV, using data with integrated luminosity 104~pb$^{-1}$ collected by GlueX experiment. fully reconstruct $\gamma p \to \eta\pi^0 p$ reaction and perform a partial-wave analysis in mass region amplitudes that incorporate linear polarization beam. This allows us to separate contributions natural- unnatural-parity exchanges. These measurements provide...
We present a search for axionlike particles, $a$, produced in photon-proton collisions at center-of-mass energy of approximately 4 GeV, focusing on the scenario where $a$-gluon coupling is dominant. The uses $a\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\gamma}$ and $a\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$ decays, data sample corresponding to an integrated luminosity $168\text{ }\text{...
Hadroproduction of the $\frac{J}{\ensuremath{\psi}}$ and ${\ensuremath{\psi}}^{\ensuremath{'}}$ states has been studied in 300-GeV/c proton, antiproton, ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$Li interactions. Both total differential cross sections ${x}_{F}$ ${p}_{T}$ have measured for ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, antiproton The ratio to production determined four types beam particles.
We have studied muon pairs with an invariant mass between 4 and 9 GeV/c2 produced in p¯N π−N interactions at incident momentum of 125 GeV/c. The experiment was performed Fermilab using a tungsten target special beam enriched to contain 18% antiprotons. compare differential distributions as functions the dimuon mass, Feynman x, transverse momentum, decay angles predictions Drell-Yan model including QCD corrections. Quark structure for p¯ π− are extracted. Comparisons antiproton data...