Journal Article

PreJuSER-28830

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Measurement of exclusive omega electroproduction at HERA

Cloth, P. ; Filges, D.FZJ* ; Members of the ZEUS Collaboration

2000
North-Holland Publ. Amsterdam

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Abstract: The exclusive electroproduction of omega mesons, ep --> e omega p, has been studied in the kinematic range 3 < Q(2) < 20 GeV2, 40 < W< 120 GeV and /t/ < 0.6 GeV2 with the ZEUS detector at HERA using an integrated luminosity of 37.7 pb(-1). The omega mesons were identified via the decay omega --> pi(+)pi(-)pi(0). The exclusive cross section in the above kinematic region is sigma(ep-->e omega p) = 0.108 +/- 0.014(stat.) +/- 0.026(syst.) nb. The reaction ep --> e phi p, phi --> pi(+)pi(-)pi(0), has also been measured. The cross sections, as well as the ratios sigma(gamma)(.) (p --> omega p)/sigma(gamma)(.) (0)(-->rho)(p) and sigma(gamma)(.) (p -->omega p)/sigma(gamma)(.) (p -->phi p), are presented as a function of w and Q(2) Thus, for the first time, the properties of omega electroproduction can be compared to those of rho(0),phi and J/psi electroproduction at high W. (C) 2000 Elsevier Science B.V. All rights reserved.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Institut für Kernphysik (IKP)

Research Program(s):

1. Teilchentransport, Detektorentwicklung und Simulationi (20.48.0)

Appears in the scientific report 2000

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