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

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

2003-04-09

arxiv.org/abs/hep-ph/0304095v1

Phys.Rev.Lett.91:092002,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.91.092002

We discuss a coupled channel analysis of the $\eta\pi$ and $\eta'\pi$ systems
produced in $\pi^-p$ 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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