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7 papers · 2 filters
Gauge-invariant formulation of
H. Haberzettl, K. Nakayama
A complete, rigorous relativistic field-theory formulation of the nucleon-nucleon (NN) bremsstrahlung reaction is presented. The resulting amplitude is unitary as a matter of cours…
Toward a unified description of hadro- and photoproduction amplitudes
M. W. Paris, R. A. Arndt, R. L. Workman +2
The near-term objectives of the research program at the Data Analysis Center are established within the context of the existing partial wave analyses available through the online s…
Pion photoproduction in a dynamical coupled-channel model
F. Huang, M. Döring, H. Haberzettl +2
Pion photoproduction reactions are investigated in a dynamical coupled-channel approach based on the Juelich pi-N model, which presently includes the hadronic pi-N and eta-N stable…
On Parity-Violating Three-Nucleon Interactions and the Predictive Power of Few-Nucleon EFT at Very Low Energies
Harald W. Griesshammer, Matthias R. Schindler
We address the typical strengths of hadronic parity-violating three-nucleon interactions in "pion-less" Effective Field Theory in the nucleon-deuteron (iso-doublet) system. By anal…
Single-energy amplitudes for pion photoproduction in the first resonance region
R. L. Workman
We consider multipole amplitudes for low-energy pion photoproduction, constructed with minimal model dependence, at single energies. Comparisons with fits to the full resonance reg…
Nucleon Spin-Polarisabilities from Polarisation Observables in Low-Energy Deuteron Compton Scattering
Harald W. Griesshammer, Deepshikha Shukla
We investigate the dependence of polarisation observables in elastic deuteron Compton scattering below the pion production threshold on the spin-independent and spin-dependent iso-…