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ID 14518
本文ファイル
著者
Lesk, V. I.
Aoki, S
Burkhalter, R
Fukugita, M
Ishizuka, N
Iwasaki, Y
Kanaya, K
Kuramashi, Y
Taniguchi, Y
Ukawa, A
Umeda, T
Yoshié, T
NDC
物理学
抄録(英)
We present results for the mass of the eta[prime] meson in the continuum limit for two-flavor lattice QCD, calculated on the CP-PACS computer, using a renormalization-group-improved gauge action, and the Sheikoleslami-Wohlert fermion action with a tadpole-improved csw. The correlation functions are measured at three values of the coupling beta corresponding to the lattice spacing a[approximate]0.22, 0.16, 0.11 fm and for four values of the quark mass parameter kappa corresponding to mpi/mrho[approximate]0.8, 0.75, 0.7, 0.6. For each (beta, kappa) pair, 400–800 gauge configurations are used. The two-loop diagrams are evaluated using a noisy source method. We calculate eta[prime] propagators using both smeared and local sources, and find that excited state contaminations are much reduced by smearing. A full analysis for the smeared propagators gives meta[prime]=0.960(87)-0.248+0.036 GeV in the continuum limit, where the second error represents the systematic uncertainty coming from varying the functional form for chiral and continuum extrapolations.
掲載誌名
Physical Review D
67巻
開始ページ
074503
出版年月日
2003
出版者
American Physical Society
ISSN
0556-2821
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
Copyright (c) American Physical Society
関連情報URL(IsVersionOf)
http://dx.doi.org/10.1103/PhysRevD.67.074503
部局名
理学研究科