Pentaquark baryon production from photon-neuteron reactions

Details Pentaquark baryon production from photon-neuteron reactions Pentaquark baryon production from photon-neuteron reactions

2003-09-10

arxiv.org/abs/nucl-th/0309023v1

Nucl.Phys. A741 (2004) 215-233

Physics

Nuclear Physics

Nuclear Theory

13 pages, 6 figures

Scientific paper

10.1016/j.nuclphysa.2004.06.028

Extending the hadronic Lagrangians that we recently introduced for studying pentaquark $\Theta^+$ baryon production from meson-proton, proton-proton, and photon-proton reactions near threshold to include the anomalous interaction between $\gamma$ and $K^*K$, we evaluate the cross section for $\Theta^+$ production from photon-neutron reactions, in which the $\Theta^+$ was first detected in the SPring-8 experiment in Japan and the CLAS experiment at Thomas Jefferson National Laboratory. With empirical coupling constants and form factors, and assuming that the decay width of $\Theta^+$ is 20 MeV, the predicted cross section is found to have a peak value of about 280 nb, which is substantially larger than that for $\Theta^+$ production from photon-proton reactions.

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