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phi-meson production in the reaction p/sub arrow-up/p. -->. pK/sup -/K/sup +/p at 11. 75 GeV/c

Journal Article · · Phys. Rev. D; (United States)
15 000 events of the reaction p/sub arrow-up/p..-->..pK/sup +/K/sup -/p were obtained at 11.75 GeV/c using the Zero Gradient Synchrotron polarized proton beam and the Effective Mass Spectrometer. This event sample includes 1500 events of p/sub arrow-up/p..-->..pphip. The characteristics of phi production are examined. The t distribution is found to be quite shallow (exponential slope parameter 3.3 GeV/sup -2/). The cross section for phi production is compared to that for pp..-->..p..omega..p measured in the same apparatus. A ratio of phi/..omega.. cross sections of 0.010 +- 0.002 is found, substantially larger than the value of 0.002 predicted by the Okubo-Zweig-Iizuka rule. Upper limits are set for the production of narrow states, possibly of a qqqqq-bar quark composition, decaying into phip,K/sup +/K/sup -/p, or K/sup +/Y*(1520).
Research Organization:
Argonne National Laboratory, Argonne, Illinois 60439
OSTI ID:
5195611
Journal Information:
Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 25:9; ISSN PRVDA
Country of Publication:
United States
Language:
English