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- W2045708255 abstract "The interactions of 20 to 300 Mev ${K}^{ensuremath{-}}$ mesons on free protons and on emulsion nuclei have been studied and their decays analyzed. The ${K}^{ensuremath{-}}$-meson mean lifetime is found to be (1.38ifmmodepmelsetextpmfi{}0.24)ifmmodetimeselsetexttimesfi{}${10}^{ensuremath{-}8}$ sec. Examples of the decay modes ${K}_{ensuremath{mu}2}$, ${K}_{ensuremath{pi}2}$, ${K}_{ensuremath{mu}3}$, $ensuremath{tau}$, and ${ensuremath{tau}}^{ensuremath{'}}$ are identified. The branching ratios are found to be in agreement with those for ${K}^{+}$ mesons. The (${K}^{ensuremath{-}}p, {K}^{ensuremath{-}}p$) elastic scattering cross section is found to be 35ifmmodepmelsetextpmfi{}16 mb and the (${K}^{ensuremath{-}}p, {ensuremath{Sigma}}^{ifmmodepmelsetextpmfi{}}{ensuremath{pi}}^{ensuremath{mp}}$) cross section 27ifmmodepmelsetextpmfi{}13 mb in the energy region of 150 to 300 Mev. The mean free path for ${K}^{ensuremath{-}}$-meson captures and inelastic scatters on emulsion nuclei, except hydrogen, can be represented by $ensuremath{Lambda}(mathrm{cm})=(17.2ifmmodepmelsetextpmfi{}3.4)+(0.081ifmmodepmelsetextpmfi{}0.027){T}_{K}$, where ${T}_{K}$ is the laboratory ${K}^{ensuremath{-}}$-meson kinetic energy, for ${K}^{ensuremath{-}}$-meson energies from 20 to 300 Mev. This increase in the mean free path with ${K}^{ensuremath{-}}$-meson energy is explained in terms of the decreasing nucleon cross section. The fraction of the interactions of ${K}^{ensuremath{-}}$ mesons on nuclei which are inelastic scatters increases from 2% at low ${K}^{ensuremath{-}}$-meson energies to about 15% at 150 Mev. This increase in inelastic scattering with energy is additional evidence that the nucleus is becoming partially transparent to ${K}^{ensuremath{-}}$ mesons at about 150 Mev. Data are presented for the fraction of events with observed $ensuremath{pi}$ mesons, $ensuremath{Sigma}$ hyperons, and $ensuremath{pi}$ meson-$ensuremath{Sigma}$ hyperon pairs. The data are discussed in terms of the model which was previously presented to explain ${K}^{ensuremath{-}}$ meson captures at rest on nucleons bound in nuclei." @default.
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- W2045708255 date "1960-04-15" @default.
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- W2045708255 title "High-EnergyK−-Meson Interactions and Decays" @default.
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- W2045708255 doi "https://doi.org/10.1103/physrev.118.564" @default.
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