Quest for More Information from Lattice QCD Simulations

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概要

• 論文の詳細を見る

• Lattice QCD is one of the most powerful tools to study the non-perturbative nature of the strong interaction. Although much information has been obtained so far to understand QCD, the computational cost becomes higher and higher as we calculate on finer lattices ; simulations near the continuum are still far beyond. We report the progress on (1) renormalization group (RG) improved actions and (2) anisotropic lattice, which QCD-TARO group has developed and studied in order to get more information from the simultaions on the present computers. RG improved actions were proposed and studied by Wilson^<1)> and Iwasaki^<2)> to remove discretization effects for long distance observables. We have studied 1×1+1×2 type actions, which includes Wilson, Symanzik and Iwasaki ones, by the strong and weak coupling expansions and Monte Carlo RG method. We have calculated RG flow and obtained a new effective β-function. Anisotropic lattice, where the temporal lattice spacing is smaller than that along the spatial one, makes us possible to perform finer resolution measurements in the temporal direction. This is especially useful at the finite temperature, where the temporal lattice size is limited. We have calculated meson pole and screening masses. We have found they behave in a different manner as a function of T.

• 理論物理学刊行会の論文
• 2000-04-28

著者

• de Forcrand

  ITP, ETH-Ziirich.

• Takaishi T.

  Hiroshima University of Economics

• Qcd-taro Collaboration

  Qcd-taro Collaboration

• Stamatescu I‐o

  Univ. Heidelberg Heidelberg Deu

• Stamatescu I.o.

  Heidelberg大

• FORCRAND Ph.

  ITP, ETH-Zurich

• PEREZ M.

  Dept. Fisica Teorica, Universidad Autonoma de Madrid

• HASHIMOTO T.

  Department of Applied Physics, Fukui University

• HIOKI S.

  Department of Physics, Tezukayama Universtiy

• MATSUFURU H.

  RCNP, Osaka University

• MIYAMURA O.

  Department of Physics, Hiroshima University

• UMEDA T.

  Department of Physics, Hiroshima University

• NAKAMURA A.

  RIISE, Hiroshima University

• STAMATESCU I.-O.

  ITP, University of Heidelberg

• TAGO Y.

  Department of Computational Science, Kanazawa University

• Perez M

  Dept. Fisica Teorica Universidad Autonoma De Madrid

• Forcrand Ph.

  Itp Eth-zurich

• Matsufuru H

  Rcnp Osaka University

• Miyamura O

  Hiroshima Univ. Higashi‐hiroshima Jpn

• Miyamura Osamu

  Department Of Applied Mathematics Faculty Of Engineering Science Osaka University

• MATSUFURU Hideo

  Computing Research Center, High Energy Accelerator Research Organization (KEK)

• Tago Y.

  Department Of Computational Science Kanazawa University

• Miyamura O.

  Department Of Applied Mathematics Faculty Of Engineering Science Osaka University

• Takaishi T.

  Hiroshima Universitv Of Economics

• Hioki S.

  Department Of Physics Tezukayama Universtiy

• Hioki S.

  Department Of Physics Hiroshima University

• Umeda T.

  Department Of Physics Hiroshima University

• Umeda T.

  Department Of Hygiene Hirosaki University School Of Medicine

• MIYAMURA Osamu

  Physics Department, Hiroshima University

• HIOKI Shinji

  Department of Physics, Hiroshima University

• Garcia Perez

  Dept. Fisica Teorica, Universidad Autonoma de Madrid

• MATSUFURU Hideo

  Yukawa Institute for Theoretical Physics, Kyoto University

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