The two-pion spectra for the reaction π^- p -> π⁰π⁰ n at 38 GeV/c pion momentum and combined analysis of the GAMS, Crystal Barrel and BNL data
classification
✦ hep-ph
keywords
databareanalysisbarrelcrystaldeterminedgamsk-matrix
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We perform the K-matrix analysis of meson partial waves with IJ^{PC} =00^{++}, 10^{++}, 02^{++}, 12^{++} basing on GAMS data on \pi^-p -> \pi^0\pi^0 n, \eta\eta n, \eta\eta' n together with BNL data on \pi^-p -> K\bar K n and Crystal Barrel data on p\bar p (at rest) -> \pi^0\pi^0\pi^0, \pi^0\eta\eta, \pi^0\pi^0\eta. The positions of the amplitude poles (physical resonances) are determined as well as the positions of the K-matrix poles (bare states) and the values of bare state couplings to two-meson channels. Nonet classification of the determined bare states is discussed.
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