Cross sections for pentaquark baryon production from protons in reactions induced by hadrons and photons

Abstract

Using hadronic Lagrangians that include the interaction of pentaquark ${\Theta }^{+}$ baryon with $K$ and $N$, we evaluate the cross sections for its production from meson-proton, proton-proton, and photon-proton reactions near threshold. With empirical coupling constants and form factors, the predicted cross sections are about 1.5 mb in kaon-proton reactions, 0.1 mb in rho-nucleon reactions, 0.05 mb in pion-nucleon reactions, 20 $\mu$b in proton-proton reactions, and 40 nb in photon-proton reactions.

14 pages, 7 figures

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• Search for Theta+ via K+p -> pi+X reaction with a 1.2 GeV/c K+ beam
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• Double polarization asymmetry as a possible filter for ${\Theta }^{+}$'s parity
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• Spin observables and the determination of the parity of ${\Theta }^{+}$ in photoproduction reactions
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• A Phenomenological Lagrangian Approach to Two Kaon Photoproduction and Pentaquark Searches
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• Spin asymmetries in gamma + N --> K*bar + Theta^+
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• Pentaquark baryon production from photon-neuteron reactions
• Two-meson cloud contribution to the baryon antidecuplet binding
• Photoproduction of pentaquark cascades from nucleons
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• Phenomenological study of two-meson couplings of Theta+
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• Angular distribution and azimuthal asymmetry for pentaquark production in proton-proton collisions