128 citations · 684 across the 11 of their papers we have counts for
12 papers
Nucleon resonance parameters from Roy-Steiner equations
Martin Hoferichter, Jacobo Ruiz de Elvira, Bastian Kubis +1
A reliable determination of the pole parameters and residues of nucleon resonances is notoriously challenging, given the required analytic continuation into the complex plane. We p…
Subleading contributions to the nuclear scalar isoscalar currents
Hermann Krebs, Evgeny Epelbaum, Ulf-G. Meißner
We extend our recent analyses of the nuclear vector, axial-vector and pseudoscalar currents and derive the leading one-loop corrections to the two-nucleon scalar current operator i…
Reconciling threshold and subthreshold expansions for pion-nucleon scattering
D. Siemens, J. Ruiz de Elvira, E. Epelbaum +4
Heavy-baryon chiral perturbation theory (ChPT) at one loop fails in relating the pion-nucleon amplitude in the physical region and for subthreshold kinematics due to loop effects e…
On the pi pi continuum in the nucleon form factors and the proton radius puzzle
M. Hoferichter, B. Kubis, J. Ruiz de Elvira +2
We present an improved determination of the continuum contribution to the isovector spectral functions of the nucleon electromagnetic form factors. Our analysis includes the m…
Roy-Steiner equations for pion-nucleon scattering
C. Ditsche, M. Hoferichter, B. Kubis +1
Starting from hyperbolic dispersion relations, we derive a closed system of Roy-Steiner equations for pion-nucleon scattering that respects analyticity, unitarity, and crossing sym…
Isospin-breaking corrections to the pion-nucleon scattering lengths
Martin Hoferichter, Bastian Kubis, Ulf-G. Meißner
We analyze isospin breaking through quark mass differences and virtual photons in the pion-nucleon scattering lengths in all physical channels in the framework of covariant baryon…