Pentaquark baryon production from photon-neuteron reactions

Abstract

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 $K^{\ast }K$, 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.

arXiv comment13 pages, 6 figures

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Cited by in corpus (12)

• Nucleon and Delta resonances in K Sigma(1385) photoproduction from nucleons
• Pentaquark Theta^+(1540) production in gamma N --> K Anti-K N
• Coherent Theta^+ and Lambda(1520) photoproduction off the deuteron
• The Narrow Theta(1543)--A QCD Dilemma: Tube or Not Tube?
• On the determination of the parity of the ${\Theta }^{+}$
• Photoproduction of the Theta^+ resonance on the nucleon in a Regge model
• Spin asymmetries in gamma + N --> K*bar + Theta^+
• Some aspects of ${\Theta }^{+}$ parity determination in the reaction $\gamma N\to {\Theta }^{+}\bar{K}\to NK\bar{K}$
• Photoproduction and Radiative Decay of Spin 1/2 and 3/2 Pentaquarks
• Antikaon angular distributions in the reaction $\gamma d\to K^{-}{\Theta }^{+}p\to K^{-}{K}^{+}np$ near the threshold and the parity of the ${\Theta }^{+}$ pentaquark
• Pentaquark Theta^+ production via gamma N ->K^*bar Theta^+(3/2^(+-))
• Photoproduction of Theta^+(1540,1/2^+) reexamined with new theoretical information