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2008 Fiscal Year Final Research Report

Non-perturbative study of QCD at finite temperatures and densities

Research Project

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Project/Area Number 17340066
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionUniversity of Tsukuba

Principal Investigator

KANAYA Kazuyuki  University of Tsukuba, 大学院・数理物質科学研究科, 教授 (80214443)

Co-Investigator(Kenkyū-buntansha) UKAWA Akira  筑波大学, 大学院・数理物質科学研究科, 教授 (10143538)
AOKI Sinya  筑波大学, 大学院・数理物質科学研究科, 教授 (30192454)
HAYAKAWA Tomoteru (YOSHIE Tomoteru)  筑波大学, 大学院・数理物質科学研究科, 准教授 (40183991)
Co-Investigator(Renkei-kenkyūsha) HATSUDA Tetsuo  東京大学, 大学院・理学系研究科, 教授 (20192700)
OKAWA Masanori  広島大学, 大学院・理学研究科, 教授 (00168874)
NAKAMURA Atsushi  広島大学, 情報メディア教育研究センター, 教授 (30130876)
Project Period (FY) 2005 – 2008
Keywords量子色力学 / クォーク / 格子ゲージ理論 / 有限温度 / 有限密度 / クォーク・グルオン・プラズマ / 相転移 / 状態方程式
Research Abstract

クォーク系の有限温度・有限密度における性質を、ウイルソン型格子クォークを使った格子QCDの数値シミュレーションによって研究した。Nf =2 QCDの場合に、ウイルソン型格子クォークによる有限密度状態方程式や重クォーク対自由エネルギーを初めて計算し、クォーク密度が高くなると相転移点の揺らぎが大きくなることなどを示した。また、有限温度・有限密度QCD研究で要求される膨大な計算コストを縮小させるために『固定格子間隔アプローチ』を提案し、状態方程式の新しい非摂動論的な計算方法として『T-integral法』を開発した。

  • Research Products

    (47 results)

All 2009 2008 2007 2006

All Journal Article (13 results) (of which Peer Reviewed: 13 results) Presentation (34 results)

  • [Journal Article] Search for the Charmonia Dissociation in Lattice QCD2009

    • Author(s)
      H. Ohno, T. Umeda and K. Kanaya
    • Journal Title

      J. Phys. G: Nucl. Part. Phys 36, ref

      Pages: 064027

    • Peer Reviewed
  • [Journal Article] Search for the Charmonium Dissociation Temperature with Variational Analysis in Lattice QCD2009

    • Author(s)
      H. Ohno, T. Umeda, K. Kanaya
    • Journal Title

      PoS (LATTICE 2008) ref.203

      Pages: 1-7

    • Peer Reviewed
  • [Journal Article] Magnetic and electric screening masses from Polyakov-loop correlations2009

    • Author(s)
      Y. Maezawa, S. Aoki, S. Ejiri, T. Hatsuda, N. Ishii, K. Kanaya, N. Ukita, T. Umeda,
    • Journal Title

      PoS (LATTICE 2008) ref.194

      Pages: 1-7

    • Peer Reviewed
  • [Journal Article] Equation of state at finite density in two-flavor QCD with improved Wilson quarks2009

    • Author(s)
      S. Aoki, S. Ejiri, T. Hatsuda, N. Ishii, K. Kanaya, Y. Maezawa, N. Ukita, T. Umeda
    • Journal Title

      PoS (LATTICE 2008) ref.189

      Pages: 1-7

    • Peer Reviewed
  • [Journal Article] Thermo-dynamics of SU(3) gauge theory at fixed lattice spacing2009

    • Author(s)
      T. Umeda, S. Ejiri, S. Aoki, T. Hatsuda, K. Kanaya, Y. Maezawa, H. Ohno
    • Journal Title

      PoS (LATTICE 2008) ref.174

      Pages: 1-7

    • Peer Reviewed
  • [Journal Article] Fixed scale approach to equation of state in lattice QCD2009

    • Author(s)
      T. Umeda, S. Ejiri, S. Aoki, T. Hatsuda, K. Kanaya, Y. Maezawa, H. Ohno
    • Journal Title

      Phys. Rev D79, ref.051501

      Pages: 1-5

    • Peer Reviewed
  • [Journal Article] Charmonium dissociation tempera-tures in lattice QCD with a finite volume technique2008

    • Author(s)
      T. Umeda, H. Ohno, and K. Kanaya
    • Journal Title

      J. Phys. G: Nucl. Part. Phys 35, ref.104157

      Pages: 1-5

    • Peer Reviewed
  • [Journal Article] Thermodynamics and heavy-quark free energies at finite temperature and density with two flavors of improved Wilson quarks2007

    • Author(s)
      Y. Maezawa, S. Aoki, S. Ejiri, T. Hatsuda, N. Ishii, K. Kanaya, N. Ukita, T. Umeda
    • Journal Title

      PoS (LATTICE 2007) ref.207

      Pages: 1-7

    • Peer Reviewed
  • [Journal Article] Thermodynamics of two-flavor lattice QCD with an improved Wilson quark action at non-zero temperature and density2007

    • Author(s)
      Y. Maezawa, S. Aoki, S. Ejiri, T. Hatsuda, N. Ishii, K. Kanaya and N. Ukita
    • Journal Title

      J. Phys. G : Nucl. Part. Phys 34

      Pages: 651-654

    • Peer Reviewed
  • [Journal Article] Heavy-Quark Free Energy, Debye Mass, and Spatial String Tension at Finite Tempera-ture in Two Flavor Lattice QCD with Wilson Quark Action2007

    • Author(s)
      Y. Maezawa, N. Ukita, S. Aoki, S. Ejiri, T. Hatsuda, N. Ishii, K. Kanaya
    • Journal Title

      Phys. Rev D75, ref.074501

      Pages: 1-23

    • Peer Reviewed
  • [Journal Article] Finite temperature phase transition of two-flavor QCD with an improved Wilson quark action2006

    • Author(s)
      N. Ukita, S. Ejiri, T. Hatsuda, N. Ishii, Y. Maezawa, S. Aoki, K. Kanaya
    • Journal Title

      PoS (LATTICE 2006) ref.150

      Pages: 1-7

    • Peer Reviewed
  • [Journal Article] Static quark free energies at finite temperature with two flavors of improved Wilson quarks2006

    • Author(s)
      Y. Maezawa, S. Ejiri, T. Hatsuda, N. Ishii, N. Ukita, S. Aoki, K. Kanaya
    • Journal Title

      PoS (LATTICE 2006) ref.141

      Pages: 1-7

    • Peer Reviewed
  • [Journal Article] Equation of state for two-flavor QCD with an improved Wilson quark action at non-zero chemical potential2006

    • Author(s)
      S. Ejiri, T. Hatsuda, N. Ishii, Y. Maezawa, N. Ukita, S. Aoki, K. Kanaya
    • Journal Title

      PoS (LATTICE 2006) ref.132

      Pages: 1-7

    • Peer Reviewed
  • [Presentation] QCD Thermodynamics at fixed lattice scale2009

    • Author(s)
      T. Umeda
    • Organizer
      The 2nd Asian Triangle Heavy Ion Conference (ATHIC 2008)
    • Place of Presentation
      Tsukuba, Japan
    • Year and Date
      20091013-15
  • [Presentation] Lattice studies of QCD at finite temperature and finite density2009

    • Author(s)
      K. Kanaya
    • Organizer
      The 2nd Asian Triangle Heavy Ion Conference (ATHIC 2008)
    • Place of Presentation
      Tsukuba, Japan
    • Year and Date
      20091013-15
  • [Presentation] Search for the charmonia dissocia-tion temperatures in lattice QCD2009

    • Author(s)
      H. Ohno, T. Umeda and K. Kanaya
    • Organizer
      International Conference on Strangeness in Quark Matter 2008 (SQM2008)
    • Place of Presentation
      Tsinghua Univ., Beijing, China
    • Year and Date
      20091006-10
  • [Presentation] Fixed scale approach to the equation of state on the lattice2009

    • Author(s)
      K. Kanaya
    • Organizer
      The 21st International Conference on Ultra-relativistic Nucleus-Nucleus Collisions(Quark Matter 2009)
    • Place of Presentation
      Knoxville, TN, USA
    • Year and Date
      20090330-0404
  • [Presentation] Free Energies of Heavy Quarks in Full-QCD Lattice Simulations with Wilson-Type Quark Action2009

    • Author(s)
      Y. Maezawa
    • Organizer
      The 21st International Conference on Ultra-relativistic Nucleus-Nucleus Collisions (Quark Matter 2009)
    • Place of Presentation
      Knoxville, TN, USA
    • Year and Date
      20090330-0404
  • [Presentation] Equation of state at finite density in lattice QCD with Wilson-type quarks2008

    • Author(s)
      S. Ejiri
    • Organizer
      International Workshop "Tools for finite density QCD"
    • Place of Presentation
      Bielefeld, Germany
    • Year and Date
      20081119-21
  • [Presentation] Recent progress in lattice QCD at finite density2008

    • Author(s)
      S. Ejiri
    • Organizer
      The XXVI International Symposium on Lattice Field Theory (Lattice 2008)
    • Place of Presentation
      Williamsburg, Virginia, USA
    • Year and Date
      20080714-19
  • [Presentation] Magnetic and electric screening masses from Polyakov-loop correlations2008

    • Author(s)
      Y. Maezawa
    • Organizer
      The XXVI Inter-national Symposium on Lattice Field Theory (Lattice 2008)
    • Place of Presentation
      Williamsburg, Virginia, USA
    • Year and Date
      20080714-19
  • [Presentation] Search for the Charmonium Dissociation Temperature with Varia-tional Analysis in Lattice QCD2008

    • Author(s)
      H. Ohno
    • Organizer
      The XXVI International Symposium on Lattice Field Theory (Lattice 2008)
    • Place of Presentation
      Williamsburg, Virginia, USA
    • Year and Date
      20080714-19
  • [Presentation] Thermodynamics of SU(3) gauge theory at fixed lattice spacing2008

    • Author(s)
      T. Umeda
    • Organizer
      The XXVI International Symposium on Lattice Field Theory (Lattice 2008)
    • Place of Presentation
      Williamsburg, Virginia, USA
    • Year and Date
      20080714-19
  • [Presentation] Equation of state at finite Density in two-flavor QCD with improved Wilson quarks2008

    • Author(s)
      K. Kanaya
    • Organizer
      The XXVI International Symposium on Lattice Field Theory(Lattice 2008)
    • Place of Presentation
      Williamsburg, Virginia, USA
    • Year and Date
      20080714-19
  • [Presentation] Magnetic and electric screening mass in two-flavors of lattice QCD simulations2008

    • Author(s)
      Y. Maezawa
    • Organizer
      YITP International Symposium "Fundamental Problems in Hot and/or Dense QCD" (NFQCD2008)
    • Place of Presentation
      YITP, Kyoto, Japan
    • Year and Date
      20080503-06
  • [Presentation] Charmonium Wave Functions at Finite Temperature from Lattice QCD Calculations2008

    • Author(s)
      T. Umeda
    • Organizer
      RIKEN-BNL Research Center Workshop on "Understanding QGP through Spectral Functions and Euclidean Correlators"
    • Place of Presentation
      BNL, Upton, USA,
    • Year and Date
      20080423-25
  • [Presentation] Debye and Magnetic Masses in Full QCD Simulations and Comparison to AdS/CFT2008

    • Author(s)
      Y. Maezawa
    • Organizer
      RIKEN-BNL Research Center Workshop on "Understanding QGP through Spectral Functions and Euclidean Correlators"
    • Place of Presentation
      BNL, Upton, USA
    • Year and Date
      20080423-25
  • [Presentation] Charmonium dissociation temperatures in lattice QCD with a finite volume technique2008

    • Author(s)
      T. Umeda
    • Organizer
      The 20th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter 2008)
    • Place of Presentation
      Jaipur, India
    • Year and Date
      2008-02-09
  • [Presentation] Thermodynamics of QCD in lattice simulation with improved Wilson quark action at finite temperature and density2007

    • Author(s)
      Y. Maezawa
    • Organizer
      QCD in extreme conditions
    • Place of Presentation
      INFN Frascati, Rome, Italy
    • Year and Date
      20070806-08
  • [Presentation] Study of constant mode in charmonium correlators in hot QCD2007

    • Author(s)
      T. Umeda
    • Organizer
      QCD in extreme conditions
    • Place of Presentation
      INFN Frascati, Rome, Italy
    • Year and Date
      20070806-08
  • [Presentation] On the critical endpoint in QCD at non-zero temperature and density2007

    • Author(s)
      S. Ejiri
    • Organizer
      QCD in extreme conditions
    • Place of Presentation
      INFN Frascati, Rome, Italy
    • Year and Date
      20070806-08
  • [Presentation] Thermodynamics and heavy-quark free energies at finite temperature and density with two flavors of improved Wilson quarks2007

    • Author(s)
      Y. Maezawa
    • Organizer
      The XXV International Symposium on Lattice Field Theory (Lattice 2007)
    • Place of Presentation
      Regensburg, Germany
    • Year and Date
      20070730-0804
  • [Presentation] Study of the critical point in lattice QCD at high temperature and density2007

    • Author(s)
      S. Ejiri
    • Organizer
      The XXV International Symposium on Lattice Field Theory (Lattice 2007)
    • Place of Presentation
      Regensburg, Germany
    • Year and Date
      20070730-0804
  • [Presentation] Study of constant mode in charmonium correlators at finite temperature2007

    • Author(s)
      T. Umeda
    • Organizer
      The XXV International Symposium on Lattice Field Theory (Lattice 2007)
    • Place of Presentation
      Regensburg, Germany
    • Year and Date
      20070730-0804
  • [Presentation] Thermodynamics and heavy quark free energies at finite temperature and density in lattice QCD simulations2007

    • Author(s)
      Y. Maezawa
    • Organizer
      Nagoya Mini-Workshop "Chiral Symmetry in hot and/or dense matter"
    • Place of Presentation
      Nagoya, Japan
    • Year and Date
      20070625-27
  • [Presentation] Heavy-quark free energy and Debye screening effect at finite temperature and density in lattice QCD simulations2007

    • Author(s)
      Y. Maezawa
    • Organizer
      International Nuclear Physics Conference
    • Place of Presentation
      Tokyo, Japan
    • Year and Date
      20070603-08
  • [Presentation] Magnetic and electric screening mass in two-flavors of lattice QCD simulations2007

    • Author(s)
      Y. Maezawa
    • Organizer
      Fundamental Problems in Hot and/or Dense QCD (NFQCD2008)
    • Place of Presentation
      YITP, Kyoto, Japan,
    • Year and Date
      20070503-06
  • [Presentation] Static quark potentials at finite temperature in full QCD lattice simulations2006

    • Author(s)
      Y. Maezawa
    • Organizer
      Yukawa International Seminar "New Frontiers in QCD" (YKIS 2006)
    • Place of Presentation
      Yukawa Institute, Kyoto, Japan
    • Year and Date
      20061120-1208
  • [Presentation] Lattice QCD Thermodynamics with Wilson quarks2006

    • Author(s)
      S. Ejiri
    • Organizer
      Yukawa Inter-national Seminar "New Frontiers in QCD" (YKIS 2006)
    • Place of Presentation
      Yukawa Institute, Kyoto, Japan
    • Year and Date
      20061120-1208
  • [Presentation] Static quark free energies at finite temperature in full QCD lattice simulations2006

    • Author(s)
      Y. Maezawa
    • Organizer
      The 19th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter 2006)
    • Place of Presentation
      Shanghai, China
    • Year and Date
      20061114-20
  • [Presentation] Thermodynamics of two-flavor lattice QCD with an improved Wilson quark action at non-zero temperature and density2006

    • Author(s)
      Y. Maezawa
    • Organizer
      The 19th International Conference on Ultra-relativistic Nucleus-Nucleus Collisions (Quark Matter 2006)
    • Place of Presentation
      Shanghai, China
    • Year and Date
      20061104-20
  • [Presentation] QCD thermodynamics with Two Flavors of Wilson Quarks2006

    • Author(s)
      S. Ejiri
    • Organizer
      RIKEN-BNL Workshop ``QCD in Extreme Conditions''
    • Place of Presentation
      Brookhaven National Laboratory, NY, USA
    • Year and Date
      20060731-0802
  • [Presentation] Heavy Quark Potentials in Full QCD Lattice Simulations at Finite Temperature2006

    • Author(s)
      Y. Maezawa
    • Organizer
      RIKEN-BNL Workshop ''QCD in Extreme Conditions''
    • Place of Presentation
      Brookhaven National Laboratory, NY, USA
    • Year and Date
      20060731-0802
  • [Presentation] Static quark free energies at finite temperature with two flavors of improved Wilson quarks2006

    • Author(s)
      Y. Maezawa
    • Organizer
      The XXIV International Symposium on Lattice Field Theory (LATTICE 2006)
    • Place of Presentation
      Tucson, Arizona, USA
    • Year and Date
      20060723-28
  • [Presentation] Equation of state for two-flavor QCD with an improved Wilson quark action at non-zero chemical potential2006

    • Author(s)
      S. Ejiri
    • Organizer
      The XXIV International Symposium on Lattice Field Theory (Lattice 2006)
    • Place of Presentation
      Tucson, Arizona, USA
    • Year and Date
      20060723-28
  • [Presentation] Finite temperature phase transition of two-flavor QCD with an improved Wilson quark action2006

    • Author(s)
      N. Ukita
    • Organizer
      The XXIV International Symposium on Lattice Field Theory (Lattice 2006)
    • Place of Presentation
      Tucson, Arizona, USA
    • Year and Date
      20060723-28
  • [Presentation] Heavy quark potentials in full QCD lattice simulations at finite temperature2006

    • Author(s)
      Y. Maezawa
    • Organizer
      Frontiers in the Physics of Quark-Gluon Plasma
    • Place of Presentation
      RIKEN, Wako, Japan
    • Year and Date
      20060707-08

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Published: 2010-06-10   Modified: 2012-09-10  

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