Abstract
Recent HERMES measurements are presented on the coherent and incoherent part of the cross section for the exclusive diffractive production of ρ 0 mesons. The results are based on data taken with a variety of targets: 1H, 2H,3He, 14N, 20Ne and 84Kr. The method to extract the coherent-to-incoherent cross section ratios as a function of coherence length l coh and momentum transfer Q 2 is presented. The measurement of these ratios can contribute to the study of how quark-antiquark pairs interact with the nuclear medium. Using the 1 H and 14 N targets, the nuclear transparency of ρ 0 production has been measured as a function of coherence length. The data have been analysed to search for a possible onset of color transparency and are compared with recent theoretical calculations.
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© 2003 Springer Science+Business Media Dordrecht
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Airapetian, A.V. (2003). Coherent ρ 0 Meson Production at HERMES. In: Steffens, E., Shanidze, R. (eds) Spin Structure of the Nucleon. NATO Science Series II: Mathematics, Physics and Chemistry, vol 111. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0165-6_23
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DOI: https://doi.org/10.1007/978-94-010-0165-6_23
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