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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 | |||
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Este documento está disponible también en : http://hdl.handle.net/10550/43365 |
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| 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. | |||
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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 |
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| http://dx.doi.org/10.1088/1126-6708/2004/01/003 |
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22 - Física [3724]