O ct 2 00 6 Study of possible ω bound states in nuclei with the ( γ , p ) reaction
نویسنده
چکیده
We perform calculations for ω production in nuclei by means of the (γ, p) reaction for photon energies and proton angles suited to running and future experiments in present Laboratories. For some cases of possible ω optical potentials we find clear peaks which could be observable provided a good resolution in the ω energy is available. We also study the inclusive production of πγ in nuclei around the ω energy and find a double hump structure for the energy spectra, with a peak around a πγ energy of mω − 100 MeV, which could easily be misidentified by a signal of a bound ω state in nuclei, while it is due to a different scaling of the uncorrelated πγ production and ω production with subsequent πγ decay.
منابع مشابه
Photoproduction of Quasi-bound Ω Mesons in Nuclei *
We propose the (γ, p) reaction as a means of producing possible quasi-bound states of ω mesons in nuclei. We use an effective Lagrangian, based on chiral SU (3) symmetry and vector meson dominance, in order to construct the ω-nuclear potential. The contribution of bound ω states is observable in the missing energy spectra of protons emitted in forward direction for several nuclei.
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