In-medium properties of the ω meson in photon induced nuclear reactions |
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Authors: | P. Muehlich U. Mosel |
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Affiliation: | 1. Institut für Theoretische Physik, Universit?t Giessen, 35392, Giessen, Germany
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Abstract: | We discuss the possibility to study the in-medium changes of the properties of the ω meson in reactions on ordinary nuclei with elementary electromagnetic probes. We present a tree-level calculation of the elementary γp→ωp process which is extended to describe also the photoproduction of medium-modified ω mesons in nuclear matter. Using a semi-classical transport approach we obtain results for e+e? and π 0γ photoproduction off heavy nuclei in the invariant mass range of the ρ and ω mesons. Both reactions are also studied experimentally and are presently being analyzed at accelerator facilities in Bonn and at Jefferson Lab. We show that the in-medium signals expected can be as large as those obtained in heavy-ion reactions. |
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