STRUCTURE OF F(0)(980) FROM A COUPLED-CHANNEL ANALYSIS OF S-WAVE PI-PI SCATTERING

Authors
LOCHER MP MARKUSHIN VE ZHENG HQ
Citation
Mp. Locher et al., STRUCTURE OF F(0)(980) FROM A COUPLED-CHANNEL ANALYSIS OF S-WAVE PI-PI SCATTERING, EUROPEAN PHYSICAL JOURNAL C-PARTICLES AND FIELDS, 4(2), 1998, pp. 317-326
Citations number
52
Categorie Soggetti
Physics, Particles & Fields
Journal title
EUROPEAN PHYSICAL JOURNAL C-PARTICLES AND FIELDS → ACNP
ISSN journal
14346044
Volume
4
Issue
2
Year of publication
1998
Pages
317 - 326
Database
ISI
SICI code
1434-6044(1998)4:2<317:SOFFAC>2.0.ZU;2-C
Abstract
A coupled channel model is used to study the nature of the f(0)(980) r esonance. It is shown that the existence of two poles close to <K(K)ov er bar> threshold,as found in many data fits and confirmed here, can b e reconciled with the <K(K)over bar> molecular origin of the f(0)(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 n umber of bare states introduced in the model.