η′→ηππ decay as a probe of a possible lowest-lying scalar nonet

1999/02/03 by Amir H. Fariborz, Joseph Schechter, J. Schechter · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevd.60.034002

published as Phys.Rev. D60 (1999) 034002 · 25 pages, 11 figures

arxiv created 1999/02/03 · openalex publication_date 1999/06/18 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We study the \ensuremathη^\ensuremath'\ensuremath→\ensuremathη\ensuremathπ\ensuremathπ decay within an effective chiral Lagrangian approach in which the lowest lying scalar meson candidates \ensuremathσ(560) and \ensuremathκ(900) together with the f₀(980) and a₀(980) are combined into a possible nonet. We show that there exists a unique choice of the free parameters of this model which, in addition to fitting the \ensuremathπ\ensuremathπ and \ensuremathπK scattering amplitudes, well describes the experimental measurements for the partial decay width of \ensuremathη^\ensuremath'\ensuremath→\ensuremathη\ensuremathπ\ensuremathπ and the energy dependence of this decay. As a by-product, we estimate the a₀(980) width to be 70 MeV, in agreement with a new experimental analysis.

Citations

• Putative light scalar nonet
• Another look atππscattering in the scalar channel
• φ-meson and unitary symmetry model
• K-matrix analysis of the Kπ S-wave in the mass region 900–2100 MeV and nonet classification of scalar qq-states
• Analysis of a K -Scattering Phase Shift and Evidence for the (900) Meson
• Structure of Phenomenological Lagrangians. II
• Phenomenological Lagrangians

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