Abstract
Data are presented on exclusive ρ0 and ϕ production in deep inelastic muon scattering from a target consisting mainly of nitrogen. The ratio of the total cross sections for ρ0 and ϕ production is found to be 9∶(1.6±0.4) at 〈Q 2〉=7.5 GeV2, consistent with theSU(3) prediction of 9∶2. Thet dependence for exclusive ρ0 production is found to become shallover asQ 2 increases and, for largeQ 2, thet dependence is typical of that for a hard scattering process. Furthermore, the ratio of the cross sections for coherent: incoherent production from nitrogen is found to decrease rapidly withQ 2. Such behaviour indicates that even for exclusive vector meson production the virtual photon behaves predominantly as an electromagnetic probe.
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University of Warsaw, Warsaw, Poland, partly supported by CPBP-01.06
Institute for Nuclear Studies, Warsaw, Poland, partly supported by CPBP-01.09
Beiersdorf A.G., Hamburg, FRG
Physics Institute, University of Warsaw Institute for Nuclear Studies, PL-00681, Warsaw, Poland
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European Muon Collaboration., Ashman, J., Badelek, B. et al. Exclusive ρ0 and Φ production in deep inelastic muon scattering. Z. Phys. C - Particles and Fields 39, 169–175 (1988). https://doi.org/10.1007/BF01550991
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DOI: https://doi.org/10.1007/BF01550991