Pentaquark baryon production in nuclear reactions

Abstract

Using a hadronic model with empirical coupling constants and form factors, we have evaluated the cross sections for the production of exotic pentaquark ${\Theta }^{+}$ and/or ${\Xi }_5^{+}$ and ${\Xi }_5^{--}$ in reactions induced by photons, nucleons, pions, and kaons on nucleon targets. We have also predicted the ${\Theta }^{+}$ yield in relativistic heavy ion collisions using a kinetic model that takes into account both ${\Theta }^{+}$ production from the coalescence of quarks and antiquarks in the quark-gluon plasma and the effects due to subsequent hadronic absorption and regeneration.

Comments: 8 pages, 6 figures, talk presented at International Workshop Pentaquark04, July 20-24, 2004 at SPring-8, Japan