TY - JOUR

T1 - Chiral perturbation theory for pentaquark baryons and its applications

AU - Ko, P.

AU - Lee, Jungil

AU - Lee, Taekoon

AU - Park, Jae Hyeon

N1 - 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).

PY - 2005/3/31

Y1 - 2005/3/31

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=15044363493&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2005.02.031

DO - 10.1016/j.physletb.2005.02.031

M3 - Article

AN - SCOPUS:15044363493

SN - 0370-2693

VL - 611

SP - 87

EP - 92

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1-2

ER -