Interaction Cross Section of theQ−Enhancement

Abstract

We have observed coherent production of $K^{-}{\pi }^{+}{\pi }^{-}$ systems by $K^{-}$ beams on nuclei and have measured the coherent production rate in the $Q\left(1300\right)\mathrm{}$ region. Using the corresponding hydrogen and deuterium production rates we have calculated ${\sigma }_{Q^{-}}$, the $Q^{-}$-nucleon total cross section. We find ${\sigma }_{Q^{-}}={20.8}_{-9.0\mathrm{}}^{+7.2\mathrm{}}$ mb at 10 $\frac{\mathrm{GeV}}{c}$ and ${\sigma }_{Q^{-}}={20.8}_{-8.4\mathrm{}}^{+6.0\mathrm{}}$ mb at 12.7 $\frac{\mathrm{GeV}}{c}$.