• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Lattice QCD study for verification and prediction of new hadrons

Research Project

Project/Area Number 18K03638
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
Research InstitutionKyoto University (2020-2021)
High Energy Accelerator Research Organization (2019)
University of Tsukuba (2018)

Principal Investigator

Namekawa Yusuke  京都大学, 理学研究科, 特定研究員 (00377946)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords原子核理論 / 原子核(理論) / 原子核(理論) / 計算物理
Outline of Final Research Achievements

We verified our method on scattering amplitude, which is important to clarify the structure of new hadrons. Our method is applied to two-pion system and can reproduce the scattering length and the effective range with high precision. We also calculate kaon form factors and extract a Cabbibo-Kobayashi-Maskawa matrix element, a fundamental parameter of the standard model of particle physics. In addition, unexpected progress is obtained by the Complex Langevin method for QCD at finite temperature and density. Although the application range is limited, a non-perturbative calculation is proven to be successfully performed for QCD at finite density, overcoming the sign problem. This result is the first step toward the non-perturbative evaluation of the medium effect of new hadrons.

Academic Significance and Societal Importance of the Research Achievements

本研究の学術的意義は、ハドロンの構造解析に重要な散乱振幅の計算法を確立できた点が挙げられる。また、ハドロンの形状を記述する崩壊形状因子の精密決定を通して、素粒子標準理論の基礎パラメータであるキャビボ・小林・益川行列要素を決定できたことはハドロン物理的のみならず素粒子論的にも意義深い。加えて、ハドロンに対する有限密度媒質効果も中性子星内部で重要と想定されており、天体学としても意義深い。本成果はハドロンに対する有限温度・有限密度媒質効果の非摂動評価への第一歩となる。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (17 results)

All 2022 2021 2020 2019 2018

All Journal Article (10 results) (of which Peer Reviewed: 10 results,  Open Access: 8 results) Presentation (7 results) (of which Int'l Joint Research: 4 results,  Invited: 3 results)

  • [Journal Article] Calculation of kaon semileptonic form factor with the PACS10 configuration2022

    • Author(s)
      Takeshi Yamazaki, Ken-ichi Ishikawa, Naruhito Ishizuka, Yoshinobu Kuramashi, Yoshifumi Nakamura, Yusuke Namekawa, Yusuke Taniguchi, Naoya Ukita, Tomoteru Yoshie
    • Journal Title

      PoS

      Volume: LATTICE2021, 563

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Kl3 form factors at the physical point on a (10.9 fm)^3 volume2020

    • Author(s)
      PACS Collaboration: Kakazu Junpei、Ishikawa Ken-ichi、Ishizuka Naruhito、Kuramashi Yoshinobu、Nakamura Yoshifumi、Namekawa Yusuke、Taniguchi Yusuke、Ukita Naoya、Yamazaki Takeshi、Yoshie Tomoteru
    • Journal Title

      Physical Review D

      Volume: 101 Issue: 9 Pages: 1-16

    • DOI

      10.1103/physrevd.101.094504

    • NAID

      120007132631

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Two-pion scattering amplitude from Bethe-Salpeter wave function at the interaction boundary2020

    • Author(s)
      Yamazaki Takeshi、Namekawa Yusuke
    • Journal Title

      PoS

      Volume: LATTICE2019, 032 Pages: 1-7

    • DOI

      10.22323/1.363.0032

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] $K_{l3}$ form factors in $N_f = 2+1$ QCD at physical point on large volume2020

    • Author(s)
      PACS Collaboration: Kakazu Junpei、Ishikawa Ken-ichi、Ishizuka Naruhito、Kuramashi Yoshinobu、Nakamura Yoshifumi、Namekawa Yusuke、Taniguchi Yusuke、Ukita Naoya、Yamazaki Takeshi、Yoshie Tomoteru
    • Journal Title

      PoS

      Volume: LATTICE2019, 186 Pages: 1-7

    • DOI

      10.22323/1.363.0186

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Complex Langevin calculations in QCD at finite density2020

    • Author(s)
      Ito Yuta、Matsufuru Hideo、Namekawa Yusuke、Nishimura Jun、Shimasaki Shinji、Tsuchiya Asato、Tsutsui Shoichiro
    • Journal Title

      Journal of High Energy Physics

      Volume: 2020 Issue: 10 Pages: 1-19

    • DOI

      10.1007/jhep10(2020)144

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Finite size effect on vector meson and baryon sectors in 2+1 flavor QCD at the physical point2019

    • Author(s)
      Ishikawa K.-I.、Ishizuka N.、Kuramashi Y.、Nakamura Y.、Namekawa Y.、Shintani E.、Taniguchi Y.、Ukita N.、Yamazaki T.、Yoshie T.、PACS Collaboration
    • Journal Title

      Physical Review D

      Volume: 100,094502 Issue: 9 Pages: 1-9

    • DOI

      10.1103/physrevd.100.094502

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Quark mass dependence of on-shell and half off-shell scattering amplitudes from Bethe-Salpeter wave function inside the interaction range2019

    • Author(s)
      Namekawa Yusuke、Yamazaki Takeshi
    • Journal Title

      Physical Review D

      Volume: 99,114508 Issue: 11 Pages: 1-16

    • DOI

      10.1103/physrevd.99.114508

    • NAID

      120007133074

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Calculation of K -> \pi l \nu form factor in N_f = 2 + 1 QCD at physical point on (10 fm)^32019

    • Author(s)
      J. Kakazu, K.I. Ishikawa, N. Ishizuka, Y. Kuramashi, Y. Nakamura, Y. Namekawa, Y. Taniguchi, N. Ukita, T. Yamazaki, T. Yoshie
    • Journal Title

      PoS

      Volume: LATTICE2018),265 Pages: 1-7

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Finite size effect on pseudoscalar meson sector in 2+1 flavor QCD at the physical point2019

    • Author(s)
      Ishikawa K.-I.、Ishizuka N.、Kuramashi Y.、Nakamura Y.、Namekawa Y.、Taniguchi Y.、Ukita N.、Yamazaki T.、Yoshie T.、PACS Collaboration
    • Journal Title

      Physical Review D

      Volume: 99 Issue: 1 Pages: 1-7

    • DOI

      10.1103/physrevd.99.014504

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Scattering length from BS wave function inside the interaction range2019

    • Author(s)
      Y.Namekawa and T.Yamazaki
    • Journal Title

      PoS

      Volume: LATTICE2018 Pages: 1-7

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] Scattering of hadrons by lattice QCD2021

    • Author(s)
      Yusuke Namekawa
    • Organizer
      Workshop on "Physics of heavy-quark and exotic hadrons 2021"
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Exploring QCD at finite temperature and density using complex Langevin method2020

    • Author(s)
      Yusuke Namekawa
    • Organizer
      YITP seminar
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Activity of Lattice QCD common code "Bridge++" for manycore and GPU supercomputers2019

    • Author(s)
      Yusuke Namekawa
    • Organizer
      Fugaku QCD coding workshop
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Activity of Lattice QCD common code "Bridge++" for manycore and GPU supercomputers2019

    • Author(s)
      滑川裕介
    • Organizer
      QUCS2019
    • Related Report
      2019 Research-status Report
  • [Presentation] 格子量子色力学におけるソルバーについて2019

    • Author(s)
      滑川裕介
    • Organizer
      第4回 HPC-Phys 勉強会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 格子 QCD による半質量殻外散乱振幅のクォーク質量依存性評価2018

    • Author(s)
      滑川裕介
    • Organizer
      日本物理学会 2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Scattering length from BS wave function inside the interaction range2018

    • Author(s)
      Y.Namekawa
    • Organizer
      The 36th International Symposium on Lattice Field Theory
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2018-04-23   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi