Pentaquark Masses in Chiral Perturbation Theory

Details Pentaquark Masses in Chiral Perturbation Theory Pentaquark Masses in Chiral Perturbation Theory

2004-06-21

arxiv.org/abs/hep-ph/0406233v2

Phys.Rev. D70 (2004) 114022

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages; reference added, minor changes in wording

Scientific paper

10.1103/PhysRevD.70.114022

Heavy baryon chiral perturbation theory for pentaquarks is applied beyond leading order. The mass splitting in the pentaquark anti-decuplet is calculated up to NNLO. An expansion in the coupling of pentaquarks to non-exotic baryons simplifies calculations and makes the pentaquark masses insensitive to the pentaquark-nucleon mass difference. The possibility of determining coupling constants in the chiral Lagrangian on the lattice is discussed. Both positive and negative parities are considered.

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