M. Erdmann
A5049875695- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Radio Astronomy Observations and Technology
- Particle Accelerators and Free-Electron Lasers
- Distributed and Parallel Computing Systems
- Black Holes and Theoretical Physics
- Gamma-ray bursts and supernovae
- Physics and Engineering Research Articles
- Scientific Computing and Data Management
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Medical Imaging Techniques and Applications
- Atmospheric Ozone and Climate
- Advanced X-ray Imaging Techniques
- Advanced Data Storage Technologies
- Particle accelerators and beam dynamics
- Radiation Detection and Scintillator Technologies
- Superconducting Materials and Applications
RWTH Aachen University
2016-2025
FH Aachen
2006-2025
Institute of High Energy Physics
2015-2024
A. Alikhanyan National Laboratory
2022-2024
University of Antwerp
2024
Institute of Astronomy and Space Physics
2011-2023
Consejo Nacional de Investigaciones Científicas y Técnicas
2011-2023
Universidad Nacional de La Plata
2011-2023
University of Buenos Aires
2011-2023
Instituto de Tecnologías en Detección y Astropartículas
2016-2023
XML and RDF are the current standards for establishing semantic interoperability on Web, but addresses only document structure. better facilitates interoperation because it provides a data model that can be extended to address sophisticated ontology representation techniques. We explain role of ontologies in architecture Semantic Web. then briefly summarize key elements RDF, showing why using as tool will ineffective long run. argue further inference layer is needed top Web's layers,...
We present a combined fit of simple astrophysical model UHECR sources to both the energy spectrum and mass composition data measured by Pierre Auger Observatory. The has been performed for energies above 5 ⋅ 1018 eV, i.e. region all-particle so-called "ankle" feature. we adopted consists identical uniformly distributed in comoving volume, where nuclei are accelerated through rigidity-dependent mechanism. results suggest characterized relatively low maximum injection energies, hard spectra...
Abstract A new analysis of the data set from Pierre Auger Observatory provides evidence for anisotropy in arrival directions ultra-high-energy cosmic rays on an intermediate angular scale, which is indicative excess arrivals strong, nearby sources. The consist 5514 events above with zenith angles up to 80° recorded before 2017 April 30. Sky models have been created two distinct populations extragalactic gamma-ray emitters: active galactic nuclei second catalog hard Fermi -LAT sources (2FHL)...
Machine learning is an important applied research area in particle physics, beginning with applications to high-level physics analysis the 1990s and 2000s, followed by explosion of event identification reconstruction 2010s. In this document we discuss promising future development areas machine a roadmap for their implementation, software hardware resource requirements, collaborative initiatives data science community, academia industry, training community science. The main objective connect...
Self-amplified spontaneous emission in a free-electron laser has been proposed for the generation of very high brightness coherent x-rays. This process involves passing high-energy, high-charge, short-pulse, low-energy-spread, and low-emittance electron beam through periodic magnetic field long series high-quality undulator magnets. The radiation produced grows exponentially intensity until it reaches saturation point. We report on demonstration self-amplified gain, exponential growth, at...
This paper explores the motion planning problem for multiple moving objects. The approach taken consists of assigning priorities to objects, then motions one object at a time. For each object, planner constructs configuration space-time that represents time-varying constraints imposed on by other and stationary this approximately, using two-dimensional slices. is searched collision-free path. demonstrates in two domains. One domain translating planar objects; two-link articulated arms.
The proton and deuteron structure functions F2p F2d are measured in inelastic muon scattering with an average beam energy of 470 GeV. data were taken at Fermilab experiment E665 during 1991 1992 using liquid hydrogen deuterium targets. F2 measurements reported the range 0.0008<x<0.6 0.2<Q2<75 GeV2. These first precise low x Q2 data. In high where they overlap from NMC, two agreement. also DESY HERA data, there is a smooth connection between sets. At consistent QCD-evolved leading twist...
We present the simulation framework CRPropa version 3 designed for efficient development of astrophysical predictions ultra-high energy particles. Users can assemble modules most relevant propagation effects in galactic and extragalactic space, include their own physics with new features, receive on output primary secondary cosmic messengers including nuclei, neutrinos photons. In extension to contained a previous version, facilitates high-performance computing comprises physical features...
We present a detailed study of the large-scale anisotropies cosmic rays with energies above 4 EeV measured using Pierre Auger Observatory. For energy bins [4,8] and $E\geq 8$ EeV, most significant signal is dipolar modulation in right ascension at 8 as previously reported. In this paper we further scrutinize highest-energy bin by splitting it into three ranges. find that amplitude dipole increases EeV. The growth can be fitted power law index $\beta=0.79\pm 0.19$. directions dipoles are...
A search for ultra-high energy photons with energies above 1 EeV is performed using nine years of data collected by the Pierre Auger Observatory in hybrid operation mode. An unprecedented separation power between photon and hadron primaries achieved combining measurements longitudinal air-shower development particle content at ground measured fluorescence surface detectors, respectively. Only three candidates 1–2 are found, which compatible expected hadron-induced background. Upper limits on...
We present the first measurement of fluctuations in number muons extensive air showers produced by ultrahigh energy cosmic rays. find that measured are good agreement with predictions from shower simulations. This observation provides new insights into origin previously reported deficit simulations and constrains models hadronic interactions at energies. Our is compatible muon originating small deviations interaction particle production accumulate as develop.
A measurement is presented of elastic deeply virtual Compton scattering e++p→e++γ+p at HERA using data taken with the H1 detector. The cross section measured as a function photon virtuality, Q2, and invariant mass, W, γp system, in kinematic range 2<Q2<20GeV2, 30<W<120GeV |t|<1GeV2, where t squared momentum transfer to proton. compared QCD based calculations.
We describe a method of reconstructing air showers induced by cosmic rays using deep learning techniques. simulate an observatory consisting ground-based particle detectors with fixed locations on regular grid. The detector's responses to traversing shower particles are signal amplitudes as function time, which provide information transverse and longitudinal properties. In order take advantage convolutional network techniques specialized in local pattern recognition, we convert all the...