The total cross section of the reaction pp --> ppK(+)K(-) has been determined for proton-proton reactions with p(beam) = 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.

K- meson production in the proton-proton reaction at 3.67 GeV/c

BALESTRA, Ferruccio;BERTINI, Raimondo Pietro;BUSSA, Maria Pia;FAVA, Luciano;FERRERO, Livio;FROLOV, VLADIMIR;GRASSO, Antonino;MAGGIORA, MARCO;PANZIERI, Daniele;PIRAGINO, Guido;ZOSI, Gianfranco
1999

Abstract

The total cross section of the reaction pp --> ppK(+)K(-) has been determined for proton-proton reactions with p(beam) = 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.
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TOTAL CROSS-SECTION; NUCLEUS-NUCLEUS COLLISIONS; ANTIKAON PRODUCTION; NEAR-THRESHOLD; KAON; ENERGIES; MATTER
Balestra F; Bedfer Y; Bertini R; Bland LC; Brenschede A; Brochard F; Bussa MP; Tchalyshev V; Choi SH; Debowski M; Dzemidzic M; Faivre JC; Falomkin IV; Fava L; Ferrero L; Foryciarz J; Frohlich I; Frolov V; Garfagnini R; Gill D; Grasso A; Grosse E; Heinz S; Ivanov VV; Jacobs WW; Kuhn W; Maggiora A; Maggiora M; Manara A; Panzieri D; Pfaff HW; Piragino G; Pontecorvo GB; Popov A; Ritman J; Salabura P; Tosello F; Vigdor SE; Zosi G
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2318/75078
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