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arXiv · hep-ph/0312147

Chiral perturbation theory for pentaquark baryons and its applications

P. Ko·Jungil Lee·Taekoon Lee·Jae-hyeon Park
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Abstract

We construct a chiral lagrangian for pentaquark baryons assuming that the recently found Theta^+ (1540) state belongs to an antidecuplet of SU(3) flavor symmetry with J^P = (1/2)^(+-). We derive the Gell-Mann-Okubo formulae for the antidecuplet baryon masses, and a possible mixing between the antidecuplet and the pentaquark octet. Then we calculate the cross sections for pi^- p -> K^- Theta^+ and gamma n -> K^- Theta^+ using our chiral lagrangian. The resulting amplitudes respect the underlying chiral symmetry of QCD correctly. We also describe how to include the light vector mesons in the chiral lagrangian.

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P. Ko, Jungil Lee, Taekoon Lee, Jae-hyeon Park. 2003-12-11. Chiral perturbation theory for pentaquark baryons and its applications. https://doi.org/10.1016/j.physletb.2005.02.031

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