Exclusive decuplet-baryon pair production in two-photon collisions
Stanford Linear Accelerator Center, Stanford University, 94309, Stanford, California, USA
2 Institut für Physik, Universität Graz, Universitätsplatz 5, 8010, Graz, Austria
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This work extends our previous studies of two-photon annihilation into baryon-antibaryon pairs from spin-1/2 octet to spin-3/2 decuplet baryons. Our approach is based on perturbative QCD and treats baryons as quark-diquark systems. Using the same model parameters as in our previous work, supplemented by QCD sum-rule results for decuplet baryon wave functions, we are able to give absolute predictions for decuplet baryon cross sections without introducing new parameters. We find that the cross section is of the same order of magnitude as the proton cross section, well within experimental bounds.
© Springer-Verlag, 2005