Chiral perturbation theory for pentaquark baryons and its applications

P. Ko, Jungil Lee, Taekoon Lee, Jae Hyeon Park

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


We construct a chiral Lagrangian for pentaquark baryons assuming that the recently found Θ+(1540) state belongs to an antidecuplet of SU(3) flavor symmetry with JP=12±. 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 π-p→K-Θ+ and γn→K-Θ+ 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.

Original languageEnglish
Pages (from-to)87-92
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
Publication statusPublished - 2005 Mar 31

Bibliographical note

Funding Information:
This work is supported in part by KOSEF through CHEP at Kyungpook National University and by the BK21 program. The research of J.L. in the High Energy Physics Division at Argonne National Laboratory is supported by the US Department of Energy, Division of High Energy Physics, under Contract W-31-109-ENG-38. J.L. thanks KAIST and KIAS for their hospitality during this work. T.L. is supported in part by BK21 Program and Korea Research Foundation Grant (KRF-2004-015-C00095).

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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