Study ofp¯p→two neutral pseudoscalar mesons at theχc0(13P0)formation energy

Citations Over TimeTop 12% of 2005 papers

Abstract

Fermilab experiment E835 has studied reactions $\overline{p}p\ensuremath{\rightarrow}{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0},{\ensuremath{\pi}}^{0}\ensuremath{\eta},\ensuremath{\eta}\ensuremath{\eta},$ ${\ensuremath{\pi}}^{0}{\ensuremath{\eta}}^{\ensuremath{'}}$ and $\ensuremath{\eta}{\ensuremath{\eta}}^{\ensuremath{'}}$ in the energy region of the ${\ensuremath{\chi}}_{c0}({1}^{3}{P}_{0})$ from $3340$ MeV to $3470$ MeV. Interference between resonant and continuum production is observed in the ${\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}$ and $\ensuremath{\eta}\ensuremath{\eta}$ channels, and the product of the input and output branching fractions is measured. Limits on resonant production are set for the ${\ensuremath{\pi}}^{0}\ensuremath{\eta}$ and ${\ensuremath{\pi}}^{0}{\ensuremath{\eta}}^{\ensuremath{'}}$ channels. An indication of interference is observed in the $\ensuremath{\eta}{\ensuremath{\eta}}^{\ensuremath{'}}$ channel. The technique for extracting resonance parameters in an environment dominated by continuum production is described.

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