Abstract
We report on a high precision measurement of ϕ-meson production in continuum events and in direct decays of the Υ(1S)- and Υ(2S)-mesons. The ratio of the total production rate of ϕ-mesons in direct Υ(1S)- and Υ(2S)-decays over that in continuum events is 1.32±0.08±0.09 and 1.07±0.13±0.11 respectively. This is compatible with the corresponding ratio obtained for lighter mesons, but is appreciably smaller than the relative baryon production rate.
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Supported by the German Bundesministerium für Forschung und Technologie, under contract number 054DO51P
Supported by the German Bundesministerium für Forschung und Technologie, under contract number 054HD24P
Supported by the Natural Sciences and Engineering Research Council, Canada
Supported by the U.S. National Science Foundation
Supported by Raziskovalna skupnost Slovenije and the Internationales Büro KfA, Jülich
Supported by the Swedish Research Council
Supported by the U.S. Department of Energy, under contract DE-AS09-80ER10690
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ARGUS Collaboration., Albrecht, H., Böckmann, P. et al. Inclusive ϕ-meson production in electron-positron interactions in the energy region of theϒ-resonances. Z. Phys. C - Particles and Fields 41, 557–566 (1989). https://doi.org/10.1007/BF01564700
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DOI: https://doi.org/10.1007/BF01564700