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Lattice Numerical simulation of strong gauge dynamics for beyond the standard model

Research Project

Project/Area Number 25800139
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionInstitute of Physical and Chemical Research (2015)
Nagoya University (2013-2014)

Principal Investigator

Hiroshi Ohki  国立研究開発法人理化学研究所, 仁科加速器研究センター, 基礎科学特別研究員 (50596939)

Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords素粒子論 / 格子ゲージ理論 / 素粒子
Outline of Final Research Achievements

Non-perturbative nature of many-flavor QCD through the numerical simulation of the lattice gauge theory within the framework of the (walking) technicolor model has been investigated. Many-flavor QCD is a good candidate for the walking technicolor, where the flavor singlet scalar can be regarded as a technidilaton, a pseudo Nambu-Goldstone boson of the approximate scale symmetry.
In this work, we studied the flavor dependence of the low-energy behavior systematically in comparison with various number of flavor Nf=(0), 8, 12 based on a unique lattice setup. We discovered a signal of a flavor-singlet scalar meson lighter than the pseudo scalar in Nf =12 case. In Nf =8 case, we also observed a flavor-singlet scalar with mass comparable to or slightly smaller than that of the pseudo scalar in the fermion mass range of our simulations. This is a hint of the technidilaton as a composite Higgs to be identified with the Higgs boson which was discovered at LHC.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (24 results)

All 2016 2015 2014 2013

All Journal Article (10 results) (of which Int'l Joint Research: 3 results,  Acknowledgement Compliant: 7 results,  Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (14 results) (of which Int'l Joint Research: 4 results,  Invited: 5 results)

  • [Journal Article] Lattice study for conformal windows of SU(2) and SU(3) gauge theories with fundamental fermions2016

    • Author(s)
      C. Y.-H. Huang, I. Kanamori, C.-J. D. Lin, K. Ogawa, H. Ohki, A. Ramos and E. Rinaldi
    • Journal Title

      PoS LATTICE 2015

      Volume: 224 Pages: 1-7

    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] S-parameter and vector decay constant in QCD with eight fundamental fermions2016

    • Author(s)
      Aoki, T. Aoyama, E. Bennett, M. Kurachi, T. Maskawa, K. Miura, K. -i. Nagai, H. Ohki, E. Rinaldi, A. Shibata and K. Yamawaki and T. Yamazaki
    • Journal Title

      PoS LATTICE 2015

      Volume: 245 Pages: 1-7

    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Walking and conformal dynamics in many-flavor QCD2016

    • Author(s)
      Aoki, T. Aoyama, E. Bennett, M. Kurachi, T. Maskawa, K. Miura, K. -i. Nagai, H. Ohki, E. Rinaldi, A. Shibata and K. Yamawaki and T. Yamazaki
    • Journal Title

      PoS LATTICE 2015

      Volume: 213 Pages: 1-7

    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Non-Abelian discrete flavor symmetries of 10D SYM theory with magnetized extra dimensions2014

    • Author(s)
      H. Abe, T. Kobayashi, K. Sumita and Y. Tatsuta
    • Journal Title

      Journal of High energy Physics

      Volume: 1406 Issue: 6 Pages: 017-017

    • DOI

      10.1007/jhep06(2014)017

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Light composite scalar in eight-flavor QCD on the lattice2014

    • Author(s)
      Y. Aoki, T. Aoyama, M. Kurachi, T. Maskawa, K. Miura,K-i. Nagai, H.Ohki, E. Rinaldi, A. Shibata, K. Yamawaki and T. Yamazaki
    • Journal Title

      Phys. Rev. D

      Volume: 89 Issue: 11

    • DOI

      10.1103/physrevd.89.111502

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Phase structure study of SU(2) lattice gauge theory with 8 flavors2014

    • Author(s)
      Cynthia Y.-H. Huang, C.-J. David Lin, Kenji Ogawa, Hiroshi Ohki, Enrico Rinaldi
    • Journal Title

      Proceedings of Science

      Volume: Lattice 2014

    • Related Report
      2014 Research-status Report
    • Acknowledgement Compliant
  • [Journal Article] SU(3) gauge theory with 12 flavours in a twisted box2014

    • Author(s)
      C.-J. David Lin, Kenji Ogawa, Hiroshi Ohki, Alberto Ramos, Eigo Shintani
    • Journal Title

      Proceedings of Science

      Volume: Lattice 2014

    • Related Report
      2014 Research-status Report
    • Acknowledgement Compliant
  • [Journal Article] Flavor landscape of 10D SYM theory with magnetized extra dim ensions2014

    • Author(s)
      Hiroyuki Abe, Tatsuo Kobayashi, Hiroshi Ohki, Keigo Sumita and Yoshiyuki Tatsuta
    • Journal Title

      Journal of High Energy Physics

      Volume: 1404 Issue: 4 Pages: 1-25

    • DOI

      10.1007/jhep04(2014)007

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Light composite scalar in twelve- flavor QCD on the lattice2013

    • Author(s)
      Y. Aoki, T. Aoyama, M. Kurachi, T. Maskawa, K.- i. Nagai, H. Ohki, E. Rinaldi, A. Shibata, K. Yamawaki, T. Yamazaki
    • Journal Title

      Phys. Rev. Lett.

      Volume: 111 Issue: 16 Pages: 1-5

    • DOI

      10.1103/physrevlett.111.162001

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Walking signals in Nf=8 QCD on the lattice2013

    • Author(s)
      Y. Aoki, T. Aoyama, M. Kurachi, T. Maskawa, K.- i. Nagai, H. Ohki, A. Shibata, K. Yamawaki, T. Yamazaki
    • Journal Title

      Phys. Rev. D

      Volume: 87 Issue: 9 Pages: 1-22

    • DOI

      10.1103/physrevd.87.094511

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] Many-flavor QCD dynamics on the lattice2016

    • Author(s)
      Hiroshi Ohki
    • Organizer
      Lattice for Beyond the Standard Model Physics 2016
    • Place of Presentation
      Lemont・アメリカ
    • Year and Date
      2016-04-21
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Flavor-singlet sector in many-flavor QCD2016

    • Author(s)
      大木洋
    • Organizer
      日本物理学会第71回年次大会
    • Place of Presentation
      東北学院大学 泉キャンパス・ 仙台市・ 宮城県
    • Year and Date
      2016-03-21
    • Related Report
      2015 Annual Research Report
  • [Presentation] Lattice Study of Walking Dynamics in Many-flavor QCD2015

    • Author(s)
      Hiroshi Ohki
    • Organizer
      Brookhaven Forum 2015: Great Expectations, a New Chapter
    • Place of Presentation
      Upton・ アメリカ
    • Year and Date
      2015-10-07
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Composite Scalar Spectrum in many-flavor QCD2015

    • Author(s)
      Hiroshi Ohki
    • Organizer
      KITP Program: Lattice Gauge Theory for the LHC and Beyond
    • Place of Presentation
      Santa Barbara・アメリカ
    • Year and Date
      2015-09-18
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Walking and conformal dynamics in many-flavor QCD2015

    • Author(s)
      Hiroshi Ohki
    • Organizer
      The 33rd International Symposium on Lattice Field Theory
    • Place of Presentation
      Kobe International Conference Center・神戸市・兵庫県
    • Year and Date
      2015-07-14
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Lattice study of the scalar and baryon spectra in many flavor QCD2015

    • Author(s)
      Hiroshi Ohki
    • Organizer
      Sakata Memorial KMI Workshop on “Origin of Mass and Strong Coupling Gauge Theories” (SCGT15)
    • Place of Presentation
      名古屋大学
    • Year and Date
      2015-03-03 – 2015-03-06
    • Related Report
      2014 Research-status Report
  • [Presentation] Lattice study of the scalar and vector channels in many flavor QCD2014

    • Author(s)
      Hiroshi Ohki
    • Organizer
      日本物理学会2014年秋季大会
    • Place of Presentation
      佐賀大学
    • Year and Date
      2014-09-18 – 2014-09-21
    • Related Report
      2014 Research-status Report
  • [Presentation] 高次元Yang-Mills理論のフラックスを含むコンパクト化と標準模型の導出2014

    • Author(s)
      大木 洋
    • Organizer
      離散的手法による場と時空のダイナミクス
    • Place of Presentation
      慶應義塾大学日吉キャンパス
    • Year and Date
      2014-09-12 – 2014-09-15
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] Analysis of the scalar and vector channels in many flavor QCD2014

    • Author(s)
      Hiroshi Ohki
    • Organizer
      The 32nd International Symposium on Lattice Field Theory (Lattice 2014)
    • Place of Presentation
      ColumbiaUniversity, New York, USA
    • Year and Date
      2014-06-23 – 2014-06-28
    • Related Report
      2014 Research-status Report
  • [Presentation] Lattice study of (near-) conformal dynamics in many-flavor QCD2014

    • Author(s)
      大木洋
    • Organizer
      JICFus Mini-workshop on "Gauge theories with many flavors and related topics"
    • Place of Presentation
      京都大学基礎物理学研究所
    • Related Report
      2013 Research-status Report
    • Invited
  • [Presentation] Conformal dynamics in Nf=12 lattice QCD2013

    • Author(s)
      大木洋
    • Organizer
      KMI International Symposium 2013 on "Quest for the Origin of Particles and the Universe"
    • Place of Presentation
      名古屋大学
    • Related Report
      2013 Research-status Report
    • Invited
  • [Presentation] Exploring for a light composite scalar in many flavor QCD2013

    • Author(s)
      大木洋
    • Organizer
      19th International Summer Institute on Phenomenology of Elementary Particles and Cosmology
    • Place of Presentation
      Jirisan National Park, Korea
    • Related Report
      2013 Research-status Report
  • [Presentation] Exploring for a light composite scalar in eight flavor QCD2013

    • Author(s)
      大木洋
    • Organizer
      31st International Symposium on Lattice Field Theory
    • Place of Presentation
      Johannes Gutenberg University, Mainz, Germany
    • Related Report
      2013 Research-status Report
  • [Presentation] Discrete symmetry in Extra dimensions2013

    • Author(s)
      大木洋
    • Organizer
      Third Workshop on Flavor Symmetries FLASY13
    • Place of Presentation
      Satellite Campus of Niigata University
    • Related Report
      2013 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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