2π0Mass Spectrum andδ00fromπ−+p→π0+nat 10GeVc

Abstract

An enhancement in the $2{\pi }^0$ mass spectrum in the region $M_{\pi \pi }<1\mathrm{}$ GeV has been observed in ${\pi }^{-}+p\to {\pi }^0+{\pi }^0+n$ at 10 $\frac{\mathrm{GeV}}{c}$. This is interpreted as a broad isospin-0, $s$-wave resonance at 600±100 MeV with width 400±100 MeV. Because of limited mass resolution, we cannot rule out several narrower resonances with these quantum numbers.