On the mass, width and coupling constants of the f<inf>0</inf>(980)

R. Escribano, A. Gallegos, M. J.L. Lucio, G. Moreno, J. Pestieau

Research output: Contribution to journalArticleResearchpeer-review

31 Citations (Scopus)


Using the pole approach we determine the mass and width of the f0(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 ππ data for the phase shift and inelasticity, and the invariant mass spectrum of the J/ψ → φππ φKK̄ 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 f0(980), the precise position depending upon the ππ data used. As a byproduct, values for the gf0ππ and gf0KK̄ coupling constants are obtained.
Original languageEnglish
Pages (from-to)107-114
JournalEuropean Physical Journal C
Issue number1
Publication statusPublished - 1 May 2003


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