Nonperturbative renormalization of meson decay constants in quenched QCD for a renormalization group improved gauge action
Use this link to cite this item : https://ir.lib.hiroshima-u.ac.jp/00014606
ID | 14606 |
file | |
creator |
CP-PACS, Collaboration
Ide, K
Aoki, S
Burkhalter, R
Fukugita, M
Hashimoto, S
Ishikawa, T
Ishizuka, N
Iwasaki, Y
Kanaya, K
Kaneko, T
Kuramashi, Y
Lesk, V
Taniguchi, Y
Umeda, T
Ukawa, A
Yoshié, T
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NDC |
Physics
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abstract | Renormalization constants (Z-factors ) of vector and axial-vector currents are determined nonperturbatively in quenched QCD for a renormalization group improved gauge action and a tadpole-improved clover quark action using the Schrödinger functional method. Nonperturbative values of Z-factors turn out to be smaller than 1-loop perturbative values by O(15%) at a lattice spacing of a-1[approximate] 1 GeV. The pseudoscalar and vector meson decay constants calculated with the nonperturbative Z-factors show a much better scaling behavior compared to previous results obtained with tadpole-improved one-loop Z-factors. In particular, the nonperturbative Z-factors normalized at infinite physical volume show that the scaling violations of the decay constants are within about 100p to the lattice spacing a-1~1 GeV. The continuum estimates obtained from data in the range a-1~ 1–2 GeV agree with those determined from finer lattices (a-1~2-4 GeV) with the standard action.
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journal title |
Physical Review D
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volume | Volume 70
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start page | 074502
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date of issued | 2004
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publisher | The American Physical Society
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issn | 1550-7998
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language |
eng
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nii type |
Journal Article
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HU type |
Journal Articles
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DCMI type | text
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format | application/pdf
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text version | publisher
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rights | Copyright (c) 2004 The American Physical Society
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relation is version of URL | http://dx.doi.org/10.1103/PhysRevD.70.074502
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department |
Graduate School of Science
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