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ID 14446
本文ファイル
著者
Aoki, S.
Fukugita, M.
Hashimoto, S.
Ishizuka, N.
Iwasaki, Y.
Kanaya, K.
Kaneko, T
Kuramashi, Y.
Tsutsui, N.
Ukawa, A.
Yamada, N.
Yoshie, T.
キーワード
three-flavor lattice QCD
fermion algorithm
Wilson-type fermions
NDC
物理学
抄録(英)
Three-flavor QCD simulation with the O(a)-improved Wilson fermion action is made employing an exact fermion algorithm developed for an odd number of quark flavors. For the plaquette gauge action, an unexpected first-order phase transition is found in the strong coupling regime (β≲5.0) at relatively heavy quark masses (mPS/mV∼0.74–0.87). Strong metastability persists on a large lattice of size 12[3]×32, which indicates that the transition has a bulk nature. The phase gap becomes smaller toward weaker couplings and vanishes at β≃5.0, which corresponds to a lattice spacing a≃0.1  fm. These results imply that realistic simulations of QCD with three flavors of dynamical Wilson-type fermions at lattice spacings in the range a=0.1–0.2  fm are not possible with the plaquette gauge action. Extending the study to improved gauge actions, we do not observe evidence for first-order phase transition, at least within the (β,κ) range we explored. This suggests the possibility that the phase transition either moves away or weakens with improved gauge actions. Possible origins of the phase transition are discussed.
掲載誌名
Physical Review D
72巻
5号
開始ページ
054510
出版年月日
2005-09
出版者
American Physical Society
ISSN
1550-7998
出版者DOI
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) 2005 American Physical Society
関連情報URL(IsVersionOf)
http://dx.doi.org/10.1103/PhysRevD.72.054510
部局名
理学研究科