Charged-hyperon production by 400-GeV protons

Abstract

Differential production cross sections have been measured for ${\ensuremath{\Sigma}}^{\mathrm{\ensuremath{-}}}$, ${\ensuremath{\Xi}}^{\mathrm{\ensuremath{-}}}$, ${\ensuremath{\Omega}}^{\mathrm{\ensuremath{-}}}$, ${\ensuremath{\Sigma}}^{+}$, \ensuremath{\Sigma}${\ifmmode\bar\else\textasciimacron\fi{}}^{+}$, and \ensuremath{\Xi}${\ifmmode\bar\else\textasciimacron\fi{}}^{+}$ relative to pion production at several ${x}_{F}$ and ${P}_{T}$ with 0.24${\mathrm{eqx}}_{F}$${P}_{T}$using 400-GeV protons incident on a Cu target. The data can be described by the , where A and n depend only on the hyperon type, and B is quadratic in ${x}_{F}$, and also depends on hyperon type. Comparison with previous experiments supports scaling in ${x}_{F}$ over the range 200--400 GeV/c.