Photoproduction of strangeness in nuclei

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Abstract

The excitation of hypernuclei through kaon photoproduction is investigated in a Relativistic Impulse Approximation (RIA) framework. The elementary photoproduction amplitude is evaluated using diagrammatic techniques and includes low-lying hadron resonances whose coupling constants have been fitted to the data. The nuclear matrix elements are calculated in momentum space to include Fermi motion and nonlocalities in the production operator. The nucleon and hyperon bound state wavefunctions are obtained by solving the Dirac equation with scalar and vector potentials. Kaon distortion is included via a standard optical potential. Relativistic effects are found to be important along with the effects of nonlocalities, whereas kaon distortion is of minor significance.

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  • Cited by (6)

    • Electromagnetic production of hypernuclei

      2011, Annals of Physics
      Citation Excerpt :

      These include (i) the description of the current operator in the nuclear medium, (ii) the nuclear structure model for the bound nucleons and hyperons, and (iii) the effect of nuclear distortion effects on the incoming and outgoing particles. The electromagnetic production of hypernuclei has been investigated by a number of authors for photoproduction [32–39] and electroproduction [4,40]. The first complication is addressed by invoking the impulse approximation, i.e., the elementary current operator is assumed unchanged in the nuclear medium.

    Supported in part by the US Department of Energy Contract DE-ACO2-79ER 10397-7 and Deutsche Forschungsmeinschaft (SFB 201)

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