6 papers
How elastic unitarity governs resonance peaks and residue phases
S. Ceci, R. Omerović, H. Osmanović +2
Imposing elastic unitarity on resonant amplitudes yields a geometric rule connecting the reaction threshold, S-matrix pole, and Breit-Wigner peak. Validated across six orders of ma…
Rethinking Partial Widths: Unitary Mixing and the Pole Residue
S. Ceci, R. Omerović, H. Osmanović +2
The extracted partial decay width of the systematically exceeds its total width (). We demonstrate this anomaly is a natural consequence of S-matrix unitary…
Geometric Constraint on Residue Phases: Resolving the N(2190) Anomaly and Diagnosing Exotic States
S. Ceci, R. Omerović, H. Osmanović +3
We derive a parameter-free geometric constraint on residue phases dictated by the pole-threshold angle. Using the N(2190) anomaly as a test case, this constraint reveals a sign amb…
Elastic phase shift analysis reveals the geometric origin of the residue phase
S. Ceci, R. Omerović, H. Osmanović +3
We show that the complex-plane structure of light hadron resonances is governed by a unified geometric framework where the threshold position plays a decisive role. By applying thi…
No hidden physics in resonance pole residue phase
S. Ceci, R. Omerović, H. Osmanović +2
In hadron resonant scattering, there are four fundamental resonant parameters: real and imaginary part of the pole position, and the magnitude and the phase of the residue. Out of…
Resolving the partial width anomaly: Complex pole residue is not a fundamental resonance property
Saša Ceci, Hedim Osmanović, Branimir Zauner
The resonant properties of excited hadrons are commonly identified with the complex pole positions and residues of the scattering amplitude. The mass and total decay width are give…