F. Nerling
A5076395103- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Computational Physics and Python Applications
- Particle Detector Development and Performance
- Medical Imaging Techniques and Applications
- Nuclear physics research studies
- Radiation Detection and Scintillator Technologies
- Particle Accelerators and Free-Electron Lasers
- Astrophysics and Cosmic Phenomena
- Advanced Algebra and Geometry
- Advanced NMR Techniques and Applications
- advanced mathematical theories
- Nuclear Physics and Applications
- Superconducting Materials and Applications
- Cosmology and Gravitation Theories
- Quantum chaos and dynamical systems
- Atomic and Molecular Physics
- Geophysics and Gravity Measurements
- Cold Atom Physics and Bose-Einstein Condensates
- Scientific Measurement and Uncertainty Evaluation
Helmholtz Institute Mainz
2014-2025
Johannes Gutenberg University Mainz
2014-2025
Goethe University Frankfurt
2017-2025
GSI Helmholtz Centre for Heavy Ion Research
2016-2025
Institut für Hochschulforschung
2024-2025
Institute of High Energy Physics
2014-2024
Henan University
2023
Inner Mongolia University
2023
University of Turin
2015-2023
University of Groningen
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...
This paper presents a comprehensive review of both the theory and experimental successes Quantum Chromodynamics, starting with its emergence as well defined in 1972-73 following developments results up to present day. Topics include earliest theoretical foundations; fundamental constants QCD; an introductory discussion lattice QCD, only known method for obtaining exact predictions from methods approximating special focus on effective field theories; QCD under extreme conditions; measurements...
We report measurements of the photon beam asymmetry $\Sigma$ for reactions $\vec{\gamma}p\to p\pi^0$ and p\eta $ from GlueX experiment using a 9 GeV linearly-polarized, tagged incident on liquid hydrogen target in Jefferson Lab's Hall D. The asymmetries, measured as function proton momentum transfer, possess greater precision than previous $\pi^0$ are first $\eta$ this energy regime. results compared with theoretical predictions based $t$-channel, quasi-particle exchange constrain...
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{...
We propose to create a secondary beam of neutral kaons in Hall D at Jefferson Lab be used with the GlueX experimental setup for strange hadron spectroscopy. The superior CEBAF electron will enable flux on order $1\times 10^4~K_L/sec$, which exceeds that previously attained SLAC by three orders magnitude. use deuteron target provide first measurements ever neutrons. experiment measure both differential cross sections and self-analyzed polarizations produced $Λ$, $Σ$, $Ξ$, $Ω$ hyperons using...
We report on the measurement of beam asymmetry $\mathrm{\ensuremath{\Sigma}}$ for reactions $\stackrel{P\vec}{\ensuremath{\gamma}}p\ensuremath{\rightarrow}p\ensuremath{\eta}$ and $\stackrel{P\vec}{\ensuremath{\gamma}}p\ensuremath{\rightarrow}p{\ensuremath{\eta}}^{\ensuremath{'}}$ from GlueX experiment using an 8.2--8.8-GeV linearly polarized tagged photon incident a liquid hydrogen target in Hall D at Jefferson Laboratory. These measurements are made as function momentum transfer...
The PANDA detector at the international accelerator Facility for Antiproton and Ion Research in Europe (FAIR) addresses fundamental questions of hadron physics. Experiments concerning charmonium spectroscopy, search hybrids glueballs interaction hidden open charm particles with nucleons nuclei will be performed antiproton beams impinging on hydrogen or nuclear targets. Cooled allow precision scan resonances formation experiments. momentum range beam between 1.5 GeV/c 15 tests predictions by...
The COMPASS experiment at the CERN SPS investigates structure and spectrum of hadrons by scattering high energetic polarised muons off various fixed targets. During years 2002–2007, focused on nucleon spin physics using 160 GeV/c µ+ beams deuteron proton targets, including measurements gluon contribution to longitudinal target polarisation as well studies transverse effects in a transversely target. One major goal programme hadron is search for new states, particular JPC exotic states...
We report on the measurement of spin density matrix elements $\mathrm{\ensuremath{\Lambda}}(1520)$ in photoproduction reaction $\ensuremath{\gamma}p\ensuremath{\rightarrow}\mathrm{\ensuremath{\Lambda}}(1520){K}^{+}$, via its subsequent decay to ${K}^{\ensuremath{-}}p$. The was performed as part GlueX experimental program Hall D at Jefferson Laboratory using a linearly polarized photon beam with...
Positively identifying charged kaons in the PANDA forward endcap solid angle range can be achieved with Endcap Disc DIRC, allowing kaon-pion separation from 1 up to 4 GeV/c a power of at least 3 standard deviations. Design, performance, and components this DIRC are given, including recently introduced TOFPET-ASIC based read-out. Results prototype operated test beam DESY 2016 shown.
We report a measurement of the π− photoproduction beam asymmetry for reaction →γp→π−Δ++ using data from GlueX experiment in photon energy range 8.2–8.8 GeV. The Σ is measured as function four-momentum transfer t to Δ++ and compared phenomenological models. find that varies t: negative at smaller values positive higher |t|. can be described theoretically by t-channel particle exchange requiring pseudoscalar, vector, tensor intermediaries. In particular, this requires charge exchange, allowing...
The PANDA detector at the international accelerator Facility for Antiproton and Ion Research in Europe (FAIR) addresses fundamental questions of hadron physics. An excellent hadronic particle identification (PID) will be accomplished by two DIRC (Detection Internally Reflected Cherenkov light) counters target spectrometer. design barrel region covering polar angles between 22o to 140o is based on successful BABAR with several key improvements, such as fast photon timing a compact imaging...
Abstract Deep machine learning methods have been studied for the software trigger of future PANDA experiment at FAIR, using Monte Carlo simulated data from GEANT-based detector simulation framework PandaRoot. Ten physics channels that cover main topics, including electromagnetic, exotic, charmonium, open charm, and baryonic reaction channels, investigated four different anti-proton beam momenta. Different classification concepts network architectures studied. Finally a residual convolutional...
The Endcap Disc DIRC has been developed to provide an excellent particle identification for the future PANDA experiment by separating pions and kaons up a momentum of 4 GeV/c with separation power 3 standard deviations in polar angle region from 5o 22o. This goal will be achieved using dedicated algorithms based on likelihood methods applied offline analysis online event filtering. paper evaluates resulting PID performance Monte-Carlo simulations study basic single track as well complex...
We report measurements of the photon beam asymmetry $\mathrm{\ensuremath{\Sigma}}$ for reaction $\stackrel{P\vec}{\ensuremath{\gamma}}p\ensuremath{\rightarrow}{K}^{+}{\mathrm{\ensuremath{\Sigma}}}^{0}$(1193) using GlueX spectrometer in Hall D at Jefferson Lab. Data were collected by a linearly polarized energy range 8.2--8.8 GeV incident on liquid hydrogen target. The was measured as function Mandelstam variable $t$, and single value extracted events produced $u$ channel. These are first...
The COMPASS experiment at the CERN-SPS studies spectrum and structure of hadrons by scattering high energy polarised muons off various fixed targets. Recent results for hadron programme comprise highlights from different topics. A selective overview is given and, among others, following are discussed. precise determination pion polarisability, a long standing puzzle that has been solved now, presented as well measurements radiative widths. observation new narrow axial-vector state, a1(1420),...
Abstract. The Y (2175), recently renamed to ϕ (2170), is one of the rare exotic candidates connected strangeonium as compared heavier charmonium-like and bottomonium-like states. Originally observed in initial state radiation events by BaBar experiment 2006, it suggested be a strange partner vector (4230) that was first so-called XYZ states reported charmonium mass region. (2175) has been seen various experiments decay channels,but not yet searched for photo-production experiment. In this...
The light signal measured by fluorescence telescopes receives - strongly depending on the shower geometry with respect to detector a non-negligible contribution from additionally produced Cherenkov light. This has be accounted for determine primary parameters properly. In comparison previous ansatz used other experiments, impact of new analytical description production in EAS Auger event reconstruction is investigated.
The BESIII experiment at BEPCII IHEP in Beijing/China has collected the world largest data sets $τ$-charm region and it is well suited to cover a rich hadron physics programme, including charmonium open-charm spectroscopy, $R$-scan or electromagnetic form factor measurements, many more. In particular, unique between 3.8 4.6\,GeV allow for discoveries precision measurements of interesting charmonium-like (exotic) `XYZ' states. recently published cross-section measurement $Y$ states discussed...