1997/05/31 by M. P. Locher, M.P. Locher, V. E. Markushin +1 · 1 citation
Mathematics · Physics and Astronomy · #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #Spectral Theory in Mathematical Physics #hep-ph
paper · pdf · doi:10.1007/s100520050210
published as Eur.Phys.J.C4:317-326,1998 · 18 pages, 14 figures, published in Eur. Phys. J. C (online: February 20, 1998). The problem is more fully explored in the updated version: the model includes the direct coupling of qqbar channel to both pipi and KKbar channels, three new figures are added, and two data fits showing different possibilities of the interaction between the KKbar and qqbar states are presented and discussed
openalex publication_date 1998/01/01 · arxiv created 1998/04/07 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
A coupled channel model is used to study the nature of the f0(980) resonance. It is shown that the existence of two poles close to KKbar threshold, as found in many data fits and confirmed here, can be reconciled with the KKbar molecular origin of the f0(980). Due to a strong coupling between channels the number of the S-matrix poles close to the physical region in the physical case exceeds the number of bare states introduced in the model.