The exclusive production cross sections for omega and phi mesons have been measured in proton-proton reactions at p(lab) = 3.67 CeV/c. The observed phi/omega cross section ratio is (3.8 +/- 0.2(-0.9)(+1.2)) x 10(-3). After phase space corrections, this ratio is enhanced by about an order of magnitude relative to naive predictions based upon the Okubo-Zweig-Iizuka (OZI) rule, in comparison to an enhancement by a factor similar to 3 previously observed at higher beam momenta. 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 barp annihilation experiments. Furthermore, differential cross section results are also presented which indicate that although the phi meson is predominantly produced from a P-3(1) proton-proton entrance channel, other partial waves contribute significantly to the production mechanism at this beam momentum.

phi and omega meson production in p p reactions at p(lab) = 3.67-GeV/c.

GRASSO, Antonino;BALESTRA, Ferruccio;BERTINI, Raimondo Pietro;BUSSA, Maria Pia;FAVA, Luciano;FERRERO, Livio;FROLOV, VLADIMIR;GARFAGNINI, Raffaello;MAGGIORA, MARCO;PANZIERI, Daniele;PIRAGINO, Guido;ZOSI, Gianfranco
2001

Abstract

The exclusive production cross sections for omega and phi mesons have been measured in proton-proton reactions at p(lab) = 3.67 CeV/c. The observed phi/omega cross section ratio is (3.8 +/- 0.2(-0.9)(+1.2)) x 10(-3). After phase space corrections, this ratio is enhanced by about an order of magnitude relative to naive predictions based upon the Okubo-Zweig-Iizuka (OZI) rule, in comparison to an enhancement by a factor similar to 3 previously observed at higher beam momenta. 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 barp annihilation experiments. Furthermore, differential cross section results are also presented which indicate that although the phi meson is predominantly produced from a P-3(1) proton-proton entrance channel, other partial waves contribute significantly to the production mechanism at this beam momentum.
C63
024004-1
024004-49
A. GRASSO; F. Balestra, Bedfer Y, R. Bertini, Bland LC, Brenschede A, Brochard F, MP. Bussa, Choi SH, Debowski M, Dressler R, Dzemidzic M, Faivre JC, Falomkin IV, L. Fava, L. Ferrero, Foryciarz J, Frohlich I, V. Frolov, R. Garfagnini, Grosse E, Heinz S, Ivanov VV, Jacobs WW, Kuhn W, Maggiora A, M. Maggiora, A. Manara, D. Panzieri, Pfaff HW, G. Piragino, Pontecorvo GB, Popov A, Ritman J, Salabura P, Tchalyshev V, Tosello F, Vigdor SE, G. Zosi
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2318/22281
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