34 citations · 141 across the 12 of their papers we have counts for
12 papers
Possible explanation of Hoehler's clustering: effective partial-wave mixing induced by truncation
A. Svarc
Hoehler noted that resonance poles obtained from different partial waves in scattering appear to bunch together near a small set of common complex energies, and suggested that…
Resonances extracted in truncated partial-wave analysis are effective mixtures of angular momenta (Possible implications for Höhler's clustering)
A. Švarc
In truncated partial-wave analysis one fits observables, not amplitudes, and the relevant observables are bilinear in the amplitudes. For angle-dependent observables from which par…
Single-channel, single-energy partial-wave analysis with continuity improved through minimal phase constraints
A. Svarc, R. L. Workman
Single-energy partial-wave analysis has often been applied as a way to fit data with minimal model dependence. However, remaining unconstrained, partial waves at neighboring energi…
Extended SAID Partial-Wave Analysis of Pion Photoproduction
William J. Briscoe, Axel Schmidt, Igor Strakovsky +2
A unified Chew-Mandelstam description of single-pion photoproduction data, together with pion- and eta-hadroproduction data, has been extended to include measurements carried out o…
Towards an understanding of discrete ambiguities in truncated partial wave analyses
Y. Wunderlich, A. Švarc, R. L. Workman +2
It is well known that the observables in a single-channel scattering problem remain invariant once the amplitude is multiplied by an overall energy- and angle-dependent phase. This…
Fixed-t analyticity as a constraint in single energy partial wave analyses of meson photoproduction reactions
H. Osmanović, M. Hadžimehmedović, R. Omerović +6
Partial wave amplitudes of meson photoproduction reactions are an important source of information in baryon spectroscopy. We investigate a new approach in single-energy partial wav…
A connection between angular dependent phase ambiguities and the uniqueness of the partial wave decomposition
A. Švarc, Y. Wunderlich, H. Osmanović +8
Unconstrained partial-wave amplitudes obtained at discrete energies from fits to complete sets of experimental data may not vary smoothly with energy, and are in principle non-uniq…
Pole structure from energy-dependent and single-energy fits to elastic scattering data
Alfred Švarc, Mirza Hadžimehmedović, Hedim Osmanović +2
The pole structure of the current GW/SAID partial-wave analysis of elastic scattering and production data is studied. Pole positions and residues are extracted from both…
Pole positions and residues from pion photoproduction using the Laurent+Pietarinen expansion method
Alfred Švarc, Mirza Hadžimehmedović, Hedim Osmanović +3
We have applied a new approach to determine the pole positions and residues from pion photoproduction multipoles. The method is based on a Laurent expansion of the partial wave T-m…
Light Meson Dynamics Workshop. Mini proceedings
J. Bijnens, R. Escribano, S. Fang +16
The mini-proceedings of the Light Meson Dynamics Workshop held in Mainz from February 10th to 12th, 2014, are presented. The web page of the conference, which contains all talks, c…
Poles, the only true resonant-state signals, are extracted from a worldwide collection of partial wave amplitudes using only one, well controlled pole-extraction method
M. Hadžimehmedović, S. Ceci, A. Švarc +2
Each and every energy dependent partial-wave analysis is parameterizing the pole positions in a procedure defined by the way how the continuous energy dependence is implemented. Th…
Singularity structure of the pi N scattering amplitude in a meson-exchange model up to energies W < 2.0 GeV
L. Tiator, S. S. Kamalov, S. Ceci +4
Within the previously developed Dubna-Mainz-Taipei meson-exchange model, the singularity structure of the pi N scattering amplitudes has been investigated. For all partial waves up…