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On the mass, width and coupling constants of the f0(980) | | R. Escribano
; A. Gallegos
; J. L. Lucio M.
; G. Moreno
; J. Pestieau
; | | Date: |
29 Apr 2002 | | Journal: | Eur.Phys.J. C28 (2003) 107-114 | | Subject: | hep-ph hep-ex | | Affiliation: | UAB, IFAE), A. Gallegos, J. L. Lucio M., G. Moreno (Guanajuato Univ.), J. Pestieau (Louvain Univ. | | Abstract: | Using the pole approach we determine the mass and width of the $f_0(980)$; in particular, we analyze the possibility that two nearby poles are associated to it. We restrict our analysis to a neighborhood of the resonance, using $pipi$ data for the phase shift and inelasticity, and the invariant mass spectrum of the $J/psi ophipipi, phi Kar K$ decays. The formalism we use is based on unitarity and a generalized version of the Breit-Wigner parameterization. We find that a single pole describes the $f_0(980)$, the precise position depending upon the $pipi$ data used. As a byproduct, values for the $g_{f_0pipi}$ and $g_{f_0Kar K}$ coupling constants are obtained. | | Source: | arXiv, hep-ph/0204338 | | Services: | Forum | Review | PDF | Favorites | |
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