Low-energy couplings of QCD from topological zero-mode wave functions
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Low-energy couplings of QCD from topological zero-mode wave functions

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Low-energy couplings of QCD from topological zero-mode wave functions

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Giusti, L.; Hernández Gamazo, Pilar; Laine, Mikko; Weisz, P.; Wittig, Hartmut
This document is a artículoDate2004

Este documento está disponible también en : http://hdl.handle.net/10550/43365
By matching 1/m^2 divergences in finite-volume two-point correlation functions of the scalar or pseudoscalar densities with those obtained in chiral perturbation theory, we derive a relation between the Dirac operator zero-mode eigenfunctions at fixed non-trivial topology and the low-energy constants of QCD. We investigate the feasibility of using this relation to extract the pion decay constant, by computing the zero-mode correlation functions on the lattice in the quenched approximation and comparing them with the corresponding expressions in quenched chiral perturbation theory.

    Giusti, L. Hernández Gamazo, Pilar Laine, Mikko Weisz, P. Wittig, Hartmut 2004 Low-energy couplings of QCD from topological zero-mode wave functions Journal of High Energy Physics 2004 01 003-1 003-29
http://dx.doi.org/10.1088/1126-6708/2004/01/003

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