Role of high-spin hyperon resonances in the reaction of $γp \to K^+ K^+ Ξ^-$

Details Role of high-spin hyperon resonances in the reaction of $γp \to K^+ K^+ Ξ^-$ Role of high-spin hyperon resonances in the reaction of $γp \to K^+ K^+ Ξ^-$

2011-03-09

arxiv.org/abs/1103.1699v1

Phys.Rev.C83:055201,2011

Physics

Nuclear Physics

Nuclear Theory

8 pages, 3 figures, REVTeX

Scientific paper

10.1103/PhysRevC.83.055201

The recent data taken by the CLAS Collaboration at the Thomas Jefferson National Accelerator Facility for the reaction of $\gamma p \to K^+ K^+ \Xi^-$ are reanalyzed within a relativistic meson-exchange model of hadronic interactions. The present model is an extension of the one developed in an earlier work by Nakayama, Oh, and Haberzettl [Phys. Rev. C 74, 035205 (2006)]. In particular, the role of the spin-5/2 and -7/2 hyperon resonances, which were not included in the previous model, is investigated in the present study. It is shown that the contribution of the $\Sigma(2030)$ hyperon having spin-7/2 and positive parity has a key role to bring the model predictions into a fair agreement with the measured data for the $K^+\Xi^-$ invariant mass distribution.

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