Study of resonance state from lattice QCD

• Project/Area Number: 20540248
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: University of Tsukuba
• Principal Investigator: ISHIZUKA Naruhito University of Tsukuba, 大学院・数理物質科学研究科, 准教授 (70251030)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2008: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 格子場の理論 / 共鳴状態 / 散乱位相

Research Abstract

An aim of this project is to establish a method for an investigation of properties of a resonance state from the lattice QCD. The rho meson decay is studied toward this aim. The numerical calculations were carried at two quark masses which correspond to the pion mass m=41OMeV and300MeV. The decay width at the physical point(m=140MeV)is estimated from the effectiveρππcoupling constant obtained from each calculation. The results of the decay width are130(18)MeV and152(28)MeV, which are consistent with the experiment146MeV. This means that the method in this project is a reliable and an efficient method for a study of the resonance state. Applications of this method to many other resonances are expected in the future

Research Products

• [Journal Article] Calculation of ρ meson decay width from the PACS-CS configurations (2010)
  • Author(s): N.Ishizuka, 他12名
  • Journal Title: PoS(LAT2010)108
• [Journal Article] Calculation of ρ meson decay width from the PACS-CS configurations (2010)
  • Author(s): S.Aoki, et.al.
  • Journal Title: PoS(LAT2010) Pages: 108-108
• [Journal Article] Derivation of Luscher's finite size formula for N pi and NN system (2009)
  • Author(s): N.Ishizuka
  • Journal Title: PoS(LAT2009)119
• [Journal Article] S-wave pi K scattering length from lattice QCD (2009)
  • Author(s): K.Sasaki, N.Ishizuka, T.Yamazaki, M.Oka
  • Journal Title: PoS(LAT2009)098,
• [Journal Article] Derivation of Luscher's finite size formula for N pi and NN system. (2009)
  • Author(s): N.Ishizuka
  • Journal Title: PoS(LAT2009) Pages: 119-119
• [Journal Article] I=2 Two-pion wave function and scattering phase shift (2008)
  • Author(s): K.Sasaki, N.Ishizuka
  • Journal Title: Physical Review D 78巻
  • NAID: 120007138638
  • Peer Reviewed
• [Journal Article] I=2 Two-Pion Wave Function and Scattering Phase Shift (2008)
  • Author(s): K.Sasaki and N.Ishizuka
  • Journal Title: Physical Review D 78
  • NAID: 120007138638
  • Peer Reviewed
• [Presentation] Calculation of Rho meson decay width from the PACS-CS configurations (2010)
  • Author(s): 五塚成人
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 九州工業大学(福岡県)
  • Year and Date: 2010-09-12
• [Presentation] 核子-中間子、核子-核子散乱位相の格子QCD計算のための有限体積公式の導出 (2009)
  • Author(s): 互医成人
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 甲南大学(兵庫県)
  • Year and Date: 2009-09-12
• [Presentation] 核子-中間子、核子-核子散乱位相の格子QCD計算のための有限体積公式の導出 (2009)
  • Author(s): 石塚成人
  • Organizer: 日本物理学会 2009年 秋季大会
  • Place of Presentation: 甲南大学(兵庫県)
  • Year and Date: 2009-09-12