$ΔS=0$ Effective Weak Chiral Lagrangian from the Instanton Vacuum

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dc.creatorLee, H-J.
dc.creatorHyun, C. H.
dc.creatorLee, C. -H.
dc.creatorKim, H. -Ch.
dc.date2004-05-22
dc.date2005-11-04
dc.date.accessioned2026-07-07T12:26:28Z
dc.date.available2026-07-07T12:26:28Z
dc.descriptionWe 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 ${\cal O}(p^2)$ and the next-to-leading order in the $1/N_c$ 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 $1/N_c$ 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.
dc.descriptionFinal version accepted for publication in Eur. Phys. J. C
dc.identifierhttps://arxiv.org/abs/hep-ph/0405217
dc.identifierhttp://arxiv.org/abs/hep-ph/0405217
dc.identifierEur.Phys.J.C45:451-457,2006
dc.identifierdoi:10.1140/epjc/s2005-02442-3
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/214891
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.title$ΔS=0$ Effective Weak Chiral Lagrangian from the Instanton Vacuum
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