The ratio of the exclusive production cross sections for phi and omega mesons has been measured in pp reactions at T-beam = 2.85 GeV. The observed phi/omega ratio is (3.7 +/- 0.7(-0.9)(+1.2)) X 10(-3). After phase space corrections, this ratio is about a factor of 10 enhanced relative to naive predictions based upon the Okubo-Zweig-Iizuka rule, in comparison to an enhancement by a factor of similar to 3 previously observed at higher energies. The modest increase of this enhancement near the production threshold is compared to the much larger increase of the phi/omega ratio observed in specific channels of <(p)over bar p> annihilation experiments.

Production of phi and omega mesons in near-threshold pp reactions

BALESTRA, Ferruccio;BERTINI, Raimondo Pietro;BUSSA, Maria Pia;FAVA, Luciano;FERRERO, Livio;FROLOV, VLADIMIR;GRASSO, Antonino;MAGGIORA, MARCO;PANZIERI, Daniele;PIRAGINO, Guido;ZOSI, Gianfranco
1998

Abstract

The ratio of the exclusive production cross sections for phi and omega mesons has been measured in pp reactions at T-beam = 2.85 GeV. The observed phi/omega ratio is (3.7 +/- 0.7(-0.9)(+1.2)) X 10(-3). After phase space corrections, this ratio is about a factor of 10 enhanced relative to naive predictions based upon the Okubo-Zweig-Iizuka rule, in comparison to an enhancement by a factor of similar to 3 previously observed at higher energies. The modest increase of this enhancement near the production threshold is compared to the much larger increase of the phi/omega ratio observed in specific channels of <(p)over bar p> annihilation experiments.
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SIGMA-TERM; RULE; ANNIHILATION; NUCLEON; REST; STRANGENESS; COLLISIONS
Balestra F; Bedfer Y; Bertini R; Bland LC; Brenschede A; Brochard F; Bussa MP; Chalyshev V; Choi SH; Debowski M; Dzemidzic M; Falomkin IV; Faivre JC; Fava L; Ferrero L; Foryciarz J; 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; Senger P; Stroth J; 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/2318/73860
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