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Study of the $ηπ$ and $η'π$ spectra and interpetation of possible exotic $J^{PC}=1^{-+}$ mesons

Adam P. Szczepaniak·Maciej Swat·Alex R. Dzierba·Scott Teige
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Abstract

We discuss a coupled channel analysis of the $ηπ$ and $η'π$ systems produced in $π^-p$ interactions at 18 GeV/$c$. We show that known $Q\bar Q$ resonances, together with residual soft meson-meson rescattering, saturate the spectra including the exotic $J^{PC}=1^{-+}$ channel. A possibility of a narrow exotic resonance at a mass near 1.6 GeV/$c^2$ cannot, however, be ruled out.

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Adam P. Szczepaniak, Maciej Swat, Alex R. Dzierba, Scott Teige. 2003-04-09. Study of the $ηπ$ and $η'π$ spectra and interpetation of possible exotic $J^{PC}=1^{-+}$ mesons. https://doi.org/10.1103/physrevlett.91.092002

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