Photoproduction of η-mesons off light nuclei
نویسندگان
چکیده
منابع مشابه
Photoproduction of η-mesons from light nuclei
In a series of experiments coherent and quasifree η-photoproduction from light nuclei (He, He, H) was investigated with the TAPS-detector at the Mainz MAMI-accelerator. The experiments were motivated by two different subjects: the determination of the isospin structure of the electromagnetic excitation of the S11(1535) resonance and the study of the η-nucleon and η-nucleus interaction at small ...
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Quasi-free photoproduction of η′-mesons off nucleons bound in the deuteron has been measured with the combined Crystal Barrel TAPS detector. The experiment was done at a tagged photon beam of the ELSA electron accelerator in Bonn for incident photon energies from the production threshold up to 2.5GeV. The η′-mesons have been detected in coincidence with recoil protons and recoil neutrons. The q...
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A formalism is developed for the partial wave analysis of data on meson photoproduction off deuterons and applied to photoproduction of η and π 0 mesons. Different interpretations of a dip-bump structure of the η photoproduction cross section in the 1670 MeV region are presented and discussed. Helicity amplitudes for two low-mass S11 states are determined.
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An effective field theory with hadrons and photons is constructed, where the hadronic parameters are determined by fitting elastic πN scattering data. The predicted pioninduced η-production on the nucleon agrees well with the data. The hadronic model is then used to describe the final-state interaction in photoinduced processes. We present a consistent description of pion photoproduction in the...
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The importance of Born terms and resonance exchange for η and η ′ photoproduction off both the proton and neutron within U (3) baryon chi-ral perturbation theory is investigated. Low-lying resonances such as the vector mesons and J P = 1/2 + , 1/2 − baryon resonances are included explicitly and their contributions together with the Born terms are calculated. The coupling constants of the resona...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 2001
ISSN: 0375-9474
DOI: 10.1016/s0375-9474(01)00860-0