Low-lying mode contribution to the quenched meson correlators in the .EPSILON.-regime
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Accession number;05A0430950
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| Title;Low-lying mode contribution to the quenched meson correlators in the .EPSILON.-regime |
| Author;
FUKAYA HIDENORI
(Kyoto Univ., Kyoto, Jpn)
HASHIMOTO SHOJI
(High Energy Accelerator Res. Organization(kek), Tsukuba, Jpn)
OGAWA KENJI
(Graduate Univ. Advanced Studies(sokendai), Tsukuba, Jpn)
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Journal Title;YITP
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Journal Code:L0911B
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ISSN:
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VOL.;NO.05-19;PAGE.28P(2005)
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| Figure&Table&Reference;FIG.16, TBL.3, REF.28 |
| Pub. Country;Japan |
| Language;English |
| Abstract;In the quench approximation of the lattice gauge theory with the lattice size 103*20, the correlation functions of the meson are calculated with the overlap fermions at small masses 2.6-13 MeV. The pion Compton wavelength is larger than the lattice size, so that this region correspond to the .EPSILON.-regime of the chiral perturbation theory. Although the scalar and pseudo-scalar correlation functions are found to be well approximated by a few hundred low-lying fermion eigenmodes, higher eigenmodes contribute to the correlation function of the axial-vector meson. By comparing these computer simulation data with the one-loop expression for the correlation function in quenched chiral perturbation theory, the decay constant and the chiral condensate are evaluated. |
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