3 papers
hep-ph2026
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…
hep-ph2026
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…
hep-ph2020
The strangest non-strange meson is not so strange after all
Saša Ceci, Marin Vukšić, Branimir Zauner
The broad non-strange meson (500) is considered to be a non-Breit-Wigner resonance. It is generally assumed that if a resonance is broad it can hardly be described by a Breit-…