A5002727326- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Atomic and Molecular Physics
- High-pressure geophysics and materials
- Nuclear reactor physics and engineering
- Physics of Superconductivity and Magnetism
- Superconducting Materials and Applications
- Astronomical and nuclear sciences
- Rare-earth and actinide compounds
- Advanced NMR Techniques and Applications
- Research Data Management Practices
- Nuclear Physics and Applications
- Electromagnetic Launch and Propulsion Technology
- HVDC Systems and Fault Protection
- Academic Publishing and Open Access
- Radiomics and Machine Learning in Medical Imaging
- High-Energy Particle Collisions Research
- Magnetic properties of thin films
- Particle accelerators and beam dynamics
- Advanced Chemical Physics Studies
- Magnetic confinement fusion research
- Superconductivity in MgB2 and Alloys
Ruhr University Bochum
2018-2023
Institut für Psychologische Psychotherapie
2020
University of Geneva
1999-2002
We review a new generation of nuclear forces derived in chiral effective field theory using the recently proposed semilocal regularization method. outline conceptual foundations theory, discuss all steps needed to compute observables starting from Lagrangian and consider selected applications two- few-nucleon sectors. highlight key challenges developing high-precision three-body forces, such as need maintain consistency between many-body interactions constraints placed by gauge symmetries...
We present a systematic investigation of few-nucleon systems and light nuclei using the current LENPIC interactions comprising semilocal momentum-space regularized two- three-nucleon forces up to third chiral order (N$^2$LO). Following our earlier study utilizing coordinate-space interactions, two low-energy constants entering three-body force are determined from triton binding energy differential cross section minimum in elastic nucleon-deuteron scattering. Predictions made for selected...
Abstract We discuss the current status of chiral effective field theory in three-nucleon sector and present selected results for nucleon–deuteron scattering observables based on semilocal momentum-space-regularized two-nucleon potentials together with consistently regularized forces up to third order. Using a Bayesian model estimating truncation errors, obtained are found provide good description experimental data. confirm our earlier findings that high-precision data below pion production...
We present a high-accuracy calculation of the deuteron structure radius in chiral effective field theory. Our analysis employs state-of-the-art semilocal two-nucleon potentials and takes into account two-body contributions to charge density operators up fifth order expansion. The strength fifth-order short-range contribution operator is adjusted experimental data on form factor. A detailed error performed by propagating statistical uncertainties low-energy constants entering estimating...
The pion-nucleon coupling constants determine the strength of long-range nuclear forces and play a fundamental part in our understanding physics. While charged- neutral-pion couplings to protons neutrons are expected be very similar, owing approximate isospin symmetry strong interaction, different masses up- down-quarks electromagnetic effects may result their slightly values. Despite previous attempts extract these from systems, knowledge values is still deficient. In this Letter we present...
We present a comprehensive analysis of the deuteron charge and quadrupole form factors based on latest two-nucleon potentials charge-density operators derived in chiral effective field theory. The single- contributions to density are expressed terms proton neutron factors, for which most up date empirical parametrizations employed. By adjusting fifth-order short-range operator reproduce world data momentum-transfer dependence we predict values structure radius moment deuteron:...
We present a comprehensive investigation of few-nucleon systems as well light and medium-mass nuclei up to $A=48$ using the current Low Energy Nuclear Physics International Collaboration two-nucleon interactions in combination with third-order (${\mathrm{N}}^{2}\mathrm{LO}$) three-nucleon forces. To address systematic overbinding starting from $A\ensuremath{\approx}10$ found our earlier study utilizing ${\mathrm{N}}^{2}\mathrm{LO}$ two- forces, we take into account higher-order corrections...
We have investigated the resistive response of high Tc thin films submitted to a density current. For this purpose, current pulses were applied into bridges made Nd(1.15)Ba(1.85)Cu3O7 and Bi2Sr2CaCu2O8. By recording time dependent voltage, we observe that at certain critical j*, highly dissipative domain develops somewhere along bridge. The successive formation these domains produces stepped I-V characteristics. present evidences are not regions with temperature above Tc, as for hot spots....
Abstract We investigate the impact of statistical uncertainties in two-nucleon potentials on neutron–deuteron elastic scattering and deuteron breakup reaction observables at incoming nucleon kinetic energy up to 200 MeV. To that end we use semi-phenomenological one-pion-exchange- Gaussian potential developed by Granada group recent semi-local momentum-space regularized chiral nucleon–nucleon interaction various orders, neglecting three-nucleon force present system. The magnitudes for these...
We examine a description of available cross section data for symmetric space star (SST) configurations in the neutron-deuteron (nd) and proton-deuteron (pd) breakup reaction using numerically exact solutions three-nucleon (3N) Faddeev equation based on two- (semi)phenomenological chiral forces. The predicted SST sections are very stable with respect to underlying dynamics incoming nucleon laboratory energies below $\approx 25$ MeV. discuss possible origins surprising discrepancies between...
We review a new generation of nuclear forces derived in chiral effective field theory using the recently proposed semilocal regularization method. outline conceptual foundations theory, discuss all steps needed to compute observables starting from Lagrangian and consider selected applications two- few-nucleon sectors. highlight key challenges developing high-precision tree-body forces, such as need maintain consistency between many-body interactions constraints placed by gauge symmetries...
Results presented in this contribution are obtained within the Low Energy Nuclear Physics International Collaboration (LENPIC). LENPIC aims to develop chiral nucleon-nucleon and many-nucleon interactions complete through at least fourth order expansion. These will be used together with consistently derived current operators solve structure reactions of light medium-mass nuclei including electroweak processes. In status nuclear forces briefly discussed. A special role played by calculations...
Propagation of uncertainties from two-nucleon potential parameters to three-nucleon observables, that is statistical errors for the neutron-deuteron elastic scattering and deuteron breakup reaction at neutron laboratory energies up 200 MeV investigated. To end we use chiral nucleon-nucleon interaction with semi-local momentum-space regularization various orders expansion, exploiting knowledge covariance matrix its parameters. For both reactions compare predictions obtained in same way but...
Nucleon-nucleon (NN) potentials from chiral EFT have entered the precision era with a $\chi^2/{\rm datum} \sim 1$ description of NN scattering data and can provide an alternative to existing partial-wave analyses. The framework does not only allow for model-independent systematically improvable isospin-invariant nuclear forces, but also makes it possible include study isospin-breaking effects. We give overview potential up N$^4$LO first results parameter-free contributions two-nucleon system.