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Chiral perturbation theory for pentaquark baryons and its applications | | P. Ko
; Jungil Lee
; Taekoon Lee
; Jae-hyeon Park
; | | Date: |
11 Dec 2003 | | Journal: | Phys.Lett. B611 (2005) 87-92 | | Subject: | hep-ph hep-ex nucl-th | | Affiliation: | 2 and 3), Taekoon Lee , Jae-hyeon Park ( KAIST, KIAS, Argonne, SNU | | 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. | | Source: | arXiv, hep-ph/0312147 | | Services: | Forum | Review | PDF | Favorites | |
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