Bulk first-order phase transition in three-flavor lattice QCD with O(a)-improved Wilson fermion action at zero temperature

Physical Review D 72 巻 5 号 054510- 頁 2005-09 発行
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タイトル ( eng )
Bulk first-order phase transition in three-flavor lattice QCD with O(a)-improved Wilson fermion action at zero temperature
作成者
Aoki S.
Fukugita M.
Hashimoto S.
Ishizuka N.
Iwasaki Y.
Kanaya K.
Kaneko T
Kuramashi Y.
Tsutsui N.
Ukawa A.
Yamada N.
Yoshie T.
収録物名
Physical Review D
72
5
開始ページ 054510
抄録
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.
著者キーワード
three-flavor lattice QCD
fermion algorithm
Wilson-type fermions
NDC分類
物理学 [ 420 ]
言語
英語
資源タイプ 学術雑誌論文
出版者
American Physical Society
発行日 2005-09
権利情報
Copyright (c) 2005 American Physical Society
出版タイプ Version of Record(出版社版。早期公開を含む)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 1550-7998
[DOI] 10.1103/PhysRevD.72.054510
[DOI] http://dx.doi.org/10.1103/PhysRevD.72.054510 ~の異版である