Photoproduction of Pentaquark in Feynman and Regge Theories

Details Photoproduction of Pentaquark in Feynman and Regge Theories Photoproduction of Pentaquark in Feynman and Regge Theories

2004-12-24

arxiv.org/abs/nucl-th/0412096v1

Phys.Rev. C71 (2005) 022202

Physics

Nuclear Physics

Nuclear Theory

5 pages, 5 figures, submitted to Phys.Rev.C as a Rapid Communication

Scientific paper

10.1103/PhysRevC.71.022202

Photoproduction of the Theta+ pentaquark on the proton is analyzed by using an isobar and a Regge models. The difference in the calculated total cross section is found to be more than two orders of magnitude for a hadronic form factor cut-off Lambda > 1 GeV. Comparable results would be obtained for 0.6 < Lambda < 0.8 GeV. We also calculate contribution of the Theta+ photoproduction to the GDH integral. By comparing with the current phenomenological calculation, it is found that the GDH sum rule favors the result obtained from Regge approach and isobar model with small Lambda.

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