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New developments in particle physics after the discovery of the Higgs boson: elucidation of the vacuum and the space-time structure with the LHC experiment

Administrative Group

Project AreaNew expansion of particle physics of post-Higgs era by LHC revealing the vacuum and space-time structure
Project/Area Number 16H06488
Research Category

Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionThe University of Tokyo

Principal Investigator

Asai Shoji  東京大学, 大学院理学系研究科(理学部), 教授 (60282505)

Project Period (FY) 2016-06-30 – 2021-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥21,840,000 (Direct Cost: ¥16,800,000、Indirect Cost: ¥5,040,000)
Fiscal Year 2020: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2019: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2018: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2017: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2016: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Keywords超対称性粒子 / ヒッグス粒子 / 暗黒物質 / LHC
Outline of Final Research Achievements

The Higgs boson discovered in LHC Run-1 was throughly studied in un-2 with the collision energy of 13 TeV and about six times higher statistics than Run-1. It was found that the Higgs boson is responsible not only for the mass of the gauge particles i.e. force carriers, but also for the mass of the matter particles. We also found that the Higgs boson is responsible for the three generations of the matter particles, which could be a significant key to the unsolved mojor problem of elementary particles. Also confirmed that the vacuum of our universe is metastable, suggesting the existence of new physics beyond the Standard Model. Systemtical searches for new physics has led to the exclusion of a wide range of parameter spaces and significantly narrowed the region in which new physics may exist. Based on the results obtained from the LHC and other experiments, the phenomenology of the new phsyics which we expect to observe at LHC in the future has been theoretically formulated.

Academic Significance and Societal Importance of the Research Achievements

本研究によりヒッグス粒子の性質に関し多くの事実が判明した。素粒子が質量を獲得する機構は標準模型の柱の一つであり,誕生直後の宇宙の相転移やその後の長い年月をかけた宇宙進化の根幹に関わる重大な要素である。本課題の実験結果からヒッグス粒子と関わる粒子の種類,世代の謎を解く鍵が明らかとなり,人類の自然科学に対する認識レベルを大きく前進させることができた。一方,超対称性などの探索からは新粒子は未発見であり,標準模型を超える物理がより重い領域に存在するであろうことが示唆される。ここで得られた実験結果,理論研究から,暗黒物質の候補となる新物理を絞り込めたことで次世代の研究にとり大きなインプットとなる。

Report

(6 results)
  • 2022 Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (63 results)

All 2021 2020 2019 2018 2017 Other

All Int'l Joint Research (30 results) Journal Article (10 results) (of which Int'l Joint Research: 10 results,  Peer Reviewed: 10 results,  Open Access: 10 results) Presentation (12 results) (of which Int'l Joint Research: 11 results,  Invited: 2 results) Funded Workshop (11 results)

  • [Int'l Joint Research] INFN Roma-I/INFN Pisa/University of Florence(イタリア)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] CERN(スイス)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] SLAC/Boston University/University of Michigan(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Max-Plank Institute(ドイツ)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Durham University/University of Cambridge(英国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] INFN Roma-I/INFN Pisa/University of Florence(イタリア)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] CERN(スイス)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] SLAC/Boston University/University of Michigan(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Max-Plank Institute(ドイツ)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Durham University/University of Cambridge(英国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] INFN Roma-I/INFN Pisa/University of Florence(イタリア)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] CERN(スイス)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] SLAC/Boston University/University of Michigan(米国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Mac-Planck Institute(ドイツ)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Durham University/University of Cambridge(英国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] INFN Roma-I/INFN Pisa/University of Florence(イタリア)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] CERN(スイス)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] SLAC/Boston University/University of Michigan(米国)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] Mac-Planck Institute(ドイツ)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] Durham University/University of Cambridge(英国)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] INFN Roma-I/INFN Pisa/University of Florence(イタリア)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research] CERN(スイス)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research] SLAC/Boston University/University of Michigan(米国)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research] Mac-Planck Institute(ドイツ)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research] Durham University/University of Cambridge(英国)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2016 Annual Research Report
  • [Journal Article] Measurement of the associated production of a Higgs boson decaying into b-quarks with a vector boson at high transverse momentum in pp collisions at √s=13 TeV with the ATLAS detector2021

    • Author(s)
      The ATLAS Collaboration (S.Asai et al)
    • Journal Title

      Physics Letters B

      Volume: 816 Pages: 136204-136204

    • DOI

      10.1016/j.physletb.2021.136204

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A search for the dimuon decay of the Standard Model Higgs boson with the ATLAS detector2021

    • Author(s)
      ATLAS Collaboration
    • Journal Title

      Physics Letters B

      Volume: 812 Pages: 135980-135980

    • DOI

      10.1016/j.physletb.2020.135980

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Search for long-lived, massive particles in events with displaced vertices and missing transverse momentum in sqrt(s) = 13 TeV pp collisions with the ATLAS detector2018

    • Author(s)
      M. Aaboud, K. Hanagaki, J. Tojo, F. Ukegawa, et al. [ATLAS Collaboration]
    • Journal Title

      Phys. Rev. D

      Volume: 97 Issue: 5 Pages: 52012-52012

    • DOI

      10.1103/physrevd.97.052012

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector2018

    • Author(s)
      ATLAS Collaboration
    • Journal Title

      Physical Review D

      Volume: 97 Issue: 7 Pages: 072003-072003

    • DOI

      10.1103/physrevd.97.072003

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Search for W W/W Z resonance production in lvqq final states in pp collisions at √s = 13 TeV with the ATLAS detector2018

    • Author(s)
      The ATLAS collaboration (M. Aaboud, M. Ishino, H. Nanjo, T. Sumida, K. Yorita et al.)
    • Journal Title

      Journal of High Energy Physics

      Volume: 3 Issue: 3 Pages: 42-42

    • DOI

      10.1007/jhep03(2018)042

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Model independent evaluation of the Wilson coefficient of the Weinberg operator in QCD2018

    • Author(s)
      T. Abe, J. Hisano and R. Nagai
    • Journal Title

      Journal of High Energy Physics

      Volume: 3 Pages: 175-175

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Search for squarks and gluinos in events with an isolated lepton, jets, and missing transverse momentum at √ s = 13 TeV with the ATLAS detector2017

    • Author(s)
      T.Saito et al., ATLAS Collaboration
    • Journal Title

      Physical Review D

      Volume: 96 Issue: 11 Pages: 112010-112010

    • DOI

      10.1103/physrevd.96.112010

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Evidence for the H→bb decay with the ATLAS detector2017

    • Author(s)
      Aaboud M. et. al. (The ATLAS collaboration)
    • Journal Title

      Journal of High Energy Physics

      Volume: 2017 Issue: 12 Pages: 024-092

    • DOI

      10.1007/jhep12(2017)024

    • Related Report
      2017 Annual Research Report 2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Search for new phenomena with large jet multiplicities and missing transverse momentum using large-radius jets and flavour-tagging at ATLAS in 13 TeV pp collisions2017

    • Author(s)
      T.Saito et al., ATLAS Collaboration
    • Journal Title

      Journal of High Energy Physics

      Volume: 12 Issue: 12 Pages: 1-50

    • DOI

      10.1007/jhep12(2017)034

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Subnanosecond time-to-digital converter implemented in a Kintex-7 FPGA2017

    • Author(s)
      Sano Y.、Horii Y.、Ikeno M.、Sasaki O.、Tomoto M.、Uchida T.
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

      Volume: 874 Pages: 50-56

    • DOI

      10.1016/j.nima.2017.08.038

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 「素粒子物理実験」とAIの接点2019

    • Author(s)
      田中 純一
    • Organizer
      JSAI2019
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Search for additional neutral Higgs bosons in the MSSM2018

    • Author(s)
      J. Tanaka
    • Organizer
      ICHEP2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Status and highlights from the ATLAS experiment2018

    • Author(s)
      K. Nagano
    • Organizer
      LHCP2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Single Event Upsets in the ATLAS IBL Frontend ASICs2018

    • Author(s)
      Y. Takubo
    • Organizer
      Pixel2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study of efficiency and noise of fine pitch planar pixel detector for ATLAS ITk upgrade2018

    • Author(s)
      K. Nakamura
    • Organizer
      Pixel2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Searches for new physics in final states with top quarks with ATLAS2018

    • Author(s)
      M. Aoki
    • Organizer
      LHCP2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Coupling and mass with 13 TeV data and expectations2017

    • Author(s)
      S. Oda
    • Organizer
      52nd Recontres de Moriond in Electroweak Interactions and Unified Thories
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Measurements of ttbar+X using the ATLAS detector2017

    • Author(s)
      K. Kawade
    • Organizer
      EPS-HEP 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ATLAS Detector Performance in Run2 and Upgrade Plans2017

    • Author(s)
      Masaya Ishino (for ATLAS collaboration)
    • Organizer
      High-Energy Physics International Conference in Quantum Chromodynamics
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Mono-jet searches2017

    • Author(s)
      Osamu Jinnouchi (for ATLAS and CMS collaborations)
    • Organizer
      DM @ LHC 2017
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Baryon-number violating nucleon decay - Review from theoretical2017

    • Author(s)
      Junji Hisano
    • Organizer
      NNN17
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Searches for Beyond SM Higgs bosons2017

    • Author(s)
      Soshi Tsuno
    • Organizer
      The 28th International Symposium on Lepton Photon Interactions at High Energies
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Funded Workshop] Dark Matter searches in the 2020s2020

    • Related Report
      2019 Annual Research Report
  • [Funded Workshop] KEK-PH20202020

    • Related Report
      2019 Annual Research Report
  • [Funded Workshop] HPNP20192019

    • Related Report
      2018 Annual Research Report
  • [Funded Workshop] DIS20182018

    • Related Report
      2018 Annual Research Report
  • [Funded Workshop] ATLAS Overview Week2018

    • Related Report
      2018 Annual Research Report
  • [Funded Workshop] HC20182018

    • Related Report
      2018 Annual Research Report
  • [Funded Workshop] 新テラスケール研究会2018

    • Related Report
      2017 Annual Research Report
  • [Funded Workshop] AJ物理ワークショップ2018

    • Related Report
      2017 Annual Research Report
  • [Funded Workshop] 新テラスケール研究会2017

    • Related Report
      2016 Annual Research Report
  • [Funded Workshop] Anomaries in b to sll and its implications2017

    • Related Report
      2016 Annual Research Report
  • [Funded Workshop] 新テラスケール研究会2017

    • Related Report
      2016 Annual Research Report

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Published: 2016-07-04   Modified: 2024-01-30  

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