2004/05/31 by Hee-Jung Lee, H-J. Lee, C. H. Hyun +5 · 1 citation
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th
paper · pdf · doi:10.1140/epjc/s2005-02442-3
published as Eur.Phys.J.C45:451-457,2006 · Final version accepted for publication in Eur. Phys. J. C
arxiv created 2005/11/04 · openalex publication_date 2005/12/08 · arxiv updated 2009/12/01 · openalex created_date 2017/12/22 · openalex updated_date 2026/07/29
We investigate the ΔS=0 effective chiral Lagrangian from the instanton vacuum. Based on the ΔS=0 effective weak Hamiltonian from the operator product expansion and renormalization group equations, we derive the strangeness-conserving effective weak chiral Lagrangian from the instanton vacuum to order \cal O(p2) and the next-to-leading order in the 1/Nc expansion at the quark level. We find that the quark condensate and a dynamical term which arise from the QCD and electroweak penguin operators appear in the next-to-leading order in the 1/Nc expansion for the ΔS =0 effective weak chiral Lagrangian, while they are in the leading order terms in the ΔS = 1 case. Three different types of the form factors are employed and we find that the dependence on the different choices of the form factor is rather insensitive. The low-energy constants of the Gasser-Leutwyler type are determined and discussed in the chiral limit.