Author/Authors :
DISTO Collaboration، نويسنده , , F. Balestra، نويسنده , , Y. Bedfer، نويسنده , , R. Bertini، نويسنده , , L.C. Bland، نويسنده , , A. Brenschede، نويسنده , , F. Brochard، نويسنده , , M.P. Bussa، نويسنده , , V. Tchalyshev، نويسنده , , Seonho Choi، نويسنده , , M. Debowski، نويسنده , , M. Dzemidzic، نويسنده , , J.-Cl. Faivre، نويسنده , , I.V. Falomkin، نويسنده , , Joseph L. Fava، نويسنده , , L. Ferrero، نويسنده , , J. Foryciarz، نويسنده , , I. Frohlich، نويسنده , , V. Frolov، نويسنده , , R. Garfagnini، نويسنده , , et al.، نويسنده ,
Abstract :
The total cross section of the reaction pp→ppK+K− has been determined for proton–proton reactions with pbeam=3.67 GeV/c. This represents the first cross section measurement of the pp→ppK−K+ channel near threshold, and is equivalent to the inclusive pp→ppK−X cross section at this beam momentum. The cross section determined at this beam momentum is about a factor 20 lower than that for inclusive pp→ppK+X meson production at the same CM energy above the corresponding threshold. This large difference in the K+ and K− meson inclusive production cross sections in proton-proton reactions is in strong contrast to cross sections measured in sub-threshold heavy ion collisions, which are similar in magnitude at the same energy per nucleon below the respective thresholds.
