Photoproduction of Theta+ on the nucleon and deuteron

Details Photoproduction of Theta+ on the nucleon and deuteron Photoproduction of Theta+ on the nucleon and deuteron

2004-12-24

arxiv.org/abs/nucl-th/0412095v1

Physics

Nuclear Physics

Nuclear Theory

8 pages, 6 figures, talk given at the International Workshop PENTAQUARK04, July 20-23 at Spring-8, Japan

Scientific paper

Photoproduction of the pentaquark particle Theta^+ on the nucleon has been studied by using an isobar and a Regge model. Using the isobar model, total cross sections around 100 nb for the gamma n --> K- Theta+ channel and 400 nb for the gamma p --> {\bar K}0 Theta+ process are obtained. The inclusion of the K* intermediate state yields a substantially large effect, especially in the gamma p --> {\bar K}0 Theta+ process. The Regge approach predicts smaller cross sections, i.e., less than 100 nb (20 nb) for the process on the neutron (proton). By using an elementary operator from the isobar model, cross sections for the process on a deuteron are predicted.

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