Nucleon structure in domain-wall-fermion lattice QCD

• Project/Area Number: 15K05064
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: Ohta Shigemi 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 准教授 (50183025)
• Project Period (FY): 2015-10-21 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 場の量子論 / 格子上の場の量子論 / ハドロン物理学 / 素粒子現象論 / 数値物理学 / スーパーコンピューター / 格子量子色力学 / ハドロン / 核子 / アイソベクトル極性流荷電 / アイソベクトル軸性流荷電 / アイソベクトルテンソル結合 / アイソベクトルスカラー結合 / スーパーコンピューター数値計算 / 格子QCD / ドメインウォール法 / 大規模数値計算 / 標準模型 / 核子構造 / 数値計算 / 極性ベクトル流 / 軸性ベクトル流 / 形状因子 / 中性子寿命 / 構造関数

Outline of Final Research Achievements

Nucleon structure calculations using three 2+1-flavor domain-wall fermion lattice QCD ensembles with a lattice cutoff momentum of about 1.38GeV/c and pion mass of about 249 and 172 MeV and another cutoff momentum of about 1.73GeV/c and pion mass of almost physical 139MeV were advanced. In the former two ensembles the calculations of nucleon mass, isovector vector and axialvector charges, and isovector tensor and scalar couplings were completed and a full paper reporting these were published. Calculations of the same observables in the last ensemble progressed: for the first time in the world an influence from nucleon excited state was confirmed in the isovector vector charge. Also the calculated value of the isovector axialvector charge slightly undershoots the experimental value.

Academic Significance and Societal Importance of the Research Achievements

核子は我々人類やその生存環境を形作る様々な元素の基本構成要素で、その質量やアイソベクトル極性・軸性荷電はその存在量や構成比を決定する物理量なので、これらについての理論的理解を深めることは我々の存在の宇宙論的進化の歴史を理解し、将来を予測するのに役立つ。またアイソベクトルテンソル・スカラー両結合の値は素粒子の標準模型を超える新物理学の探索に役立つ。

Research Products

• [Int'l Joint Research] ブルックヘイヴン国立研究所/コロンビア大学/コネティカット大学(米国)
• [Int'l Joint Research] エディンバラ大学/サウサンプトン大学(英国)
• [Int'l Joint Research] Brookhaven National Laboratory/Columbia University/Stony Brook University(米国)
• [Int'l Joint Research] University of Edinburgh/University of Southampton(英国)
• [Int'l Joint Research] コロンビア大学/ブルックヘイヴン国立研究所(米国)
• [Int'l Joint Research] エディンバラ大学/サウサンプトン大学(英国)
• [Int'l Joint Research] ブルックヘイヴン国立研究所/コロンビア大学(米国)
• [Int'l Joint Research] エディンバラ大学/サウサンプトン大学(英国)
• [Int'l Joint Research] ブルックヘイヴン国立研究所/コロンビア大学(米国)
• [Int'l Joint Research] エディンバラ大学/サウサンプトン大学(英国)
• [Journal Article] Nucleon mass and isovector couplings in 2+1-flavor dynamical domain-wall lattice QCD near physical mass (2020)
  • Author(s): Michael Abramczyk, Thomas Blum, Taku Izubuchi, Chulwoo Jung, Meifeng Lin, Andrew Lytle, Shigemi Ohta, Eigo Shintani
  • Journal Title: Physical Review D Volume: 101 Issue: 3 Pages: 034510-034510
  • DOI: 10.1103/physrevd.101.034510
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Nucleon isovector charges from physical mass domain-wall QCD (2020)
  • Author(s): Shigemi Ohta
  • Journal Title: Proceedings of Science Volume: LATTICE2019 Pages: 051-051
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Nucleon axial charge in dmain-wall QCD with physical mass (2019)
  • Author(s): Ohta Shigemi
  • Journal Title: Proceedings of Science Volume: Lattice2018 Pages: 128-128
  • Peer Reviewed / Open Access
• [Journal Article] Nucleon structure from 2+1-flavor domain-wall QCD (2018)
  • Author(s): Ohta Shigemi
  • Journal Title: EPJ Web of Conferences Volume: 175 Pages: 06012-06012
  • DOI: 10.1051/epjconf/201817506012
  • NAID: 130008153660
  • Peer Reviewed / Open Access
• [Journal Article] Nucleon structure from 2+1-flavor dynamical DWF ensembles (2016)
  • Author(s): Michael Abramczyk, Meifeng Lin, Andrew Lytle, Shigemi Ohta
  • Journal Title: Proceedings of Science Volume: LATTICE2016 Pages: 150-150
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Some nucleon isovector obsesrvables from 2+1-flavor domain-wall QCD at physical mass (2016)
  • Author(s): Shigemi Ohta
  • Journal Title: Proceedings of Science Volume: LATTICE2015 Pages: 124-124
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Domain wall QCD with physical quark masses (2016)
  • Author(s): Tom Blum, Peter Boyle, Norman Christ, Julius Frison, Nicolas Garron, Robert Hudspith, Taku Izubuchi, Tadeus Janowski, Chulwoo Jung, Andreas Juettner, Chris Kelly,Richard Kenway, Christoph Lehner, Maria Marinkovic, Robert Mawhinney, Greg McGlynn, David Murphy, Shigemi Ohta, Antonin Portelli, Chris Sacrajda
  • Journal Title: Physical Review D Volume: 93 Issue: 7 Pages: 074505-074505
  • DOI: 10.1103/physrevd.93.074505
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Low energy constants of SU(2) partially quenched chiral perturbation theory from Nf f =2+1 domain wall QCD (2016)
  • Author(s): P.A. Boyle, N.H. Christ, N. Garron, C. Jung, A. Juttner, C. Kelly, R.D. Mawhinney, G. McGlynn , D.J. Murphy , S. Ohta, A. Portelli, C.T. Sachrajda
  • Journal Title: Physical Review D Volume: 93 Issue: 5 Pages: 54502-54502
  • DOI: 10.1103/physrevd.93.054502
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Initial nucleon structure results with chiral quarks at the physical point (2015)
  • Author(s): S. Syritsyn, T. Blum, M. Engelhardt, J. Green, T. Izubuchi, C. Jung, S. Krieg, M. Lin, S. Meinel, J. Negele, S. Ohta, A. Pochinsky and E. Shintani
  • Journal Title: Proceedings of Science Volume: LATTICE2014 Pages: 134-134
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Systematics analyses on nucleon isovector observables in 2+1-flavor dynamical domain-wall lattice QCD near physical mass (2015)
  • Author(s): S. Ohta
  • Journal Title: Proceedings of Science Volume: LATTICE2014 Pages: 149-149
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Nucleon isovector axialvector charge from 2+1-flavor dynamical domain-wall lattice QCD at physical mass (2020)
  • Author(s): 太田滋生
  • Organizer: 日本物理学会
• [Presentation] Hadron structure and transition from lattice QCD using supercomputers (2019)
  • Author(s): Shigemi Ohta
  • Organizer: Supercomputing Workshop, National Supercompuer Center Jinan, Shangdong, China, December 26-28, 2019
  • Int'l Joint Research / Invited
• [Presentation] Nucleon structure from 2+1-flavor domain-wall QCD (2019)
  • Author(s): 太田滋生
  • Organizer: 日本物理学会
• [Presentation] Nucleon structure from domain-wall lattice QCD at physical mass (2019)
  • Author(s): 太田滋生
  • Organizer: 日本物理学会2019年春季年会
• [Presentation] Nucleon structure from domain-wall lattice QCD at physical mass (2018)
  • Author(s): 太田滋生
  • Organizer: 日本物理学会2018年秋季大会
• [Presentation] Nucleon structure from 2+1-flavor domain-wall QCD (2017)
  • Author(s): Shigemi Ohta
  • Organizer: Lattice 2017
  • Int'l Joint Research
• [Presentation] Nucleon structure from 2+1-flavor domain-wall lattice QCD (2017)
  • Author(s): Shigemi Ohta
  • Organizer: 日本物理学会2017年秋季大会
• [Remarks] Shigemi Ohta
  • URL: https://quark.phy.bnl.gov/~ohta/
• [Remarks]
  • URL: https://quark.phy.bnl.gov/~ohta/