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Test for the coupling of Higgs and c-quark by a new analysis mode

Research Project

Project/Area Number 20K14489
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 15020:Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics
Research InstitutionOsaka University

Principal Investigator

Hirose Minoru  大阪大学, 大学院理学研究科, 助教 (30816880)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords高エネルギー物理 / ヒッグス粒子 / ATLAS実験 / シリコン検出器 / 半導体検出器 / 高エネルギー物理学
Outline of Research at the Start

ヒッグス粒子がトップクォーク、ボトムクォークおよびタウレプトンという第三世代のフェルミオンに質量を与えていることがこれまでに確認された。本研究では、第二世代のフェルミオンであるチャームクォークにも質量を与えているのかどうかを検証する。この検証は、陽子-陽子衝突を用いるLHC実験では出来ないと考えられていたが、実験技術の向上により検証できる可能性が高まっている。感度向上のために、研究期間を通してATLAS検出器を運転してデータを倍増させ、更にこれまでに用いられていないヒッグス粒子の生成モードを本研究では解析に導入する。これにより、世界最高の感度での検証を目指す。

Outline of Final Research Achievements

We have worked on the operation of the ATLAS SCT detector for the LHC Run-3. We developed a performance monitoring system of the SCT with a completely new concept for the stable and good quality data taking. It worked well and contributed for the stable operation.
We have also worked on the analysis of the search for Higgs to a charm-quark pair events for the test of the Higgs to charm-quark Yukawa couplings. We have published some papers relating to it. For the future analysis, we developed a new estimation technique of background events using a machine-learning. We proved that it will contribute to further improve our sensitivity.

Academic Significance and Societal Importance of the Research Achievements

当研究課題で進めた、検出器の性能を最大化する性能監視システムは、大規模実験内の検出器サブシステムグループの垣根を超えたあらゆる情報をデータベース化するという新たな発想で開発したものである。これは、将来の実験においても同様の技術を用いて検出器の運転を効率化し、性能を最大化する基礎となる重要な成果となった。
また、物理解析に新たに導入した機械学習を用いる背景事象の推定法は、これまでの研究では系統誤差が大きく実用化できなかった困難を解決した末に導入できた。こちらも、ヒッグス粒子の物理だけでなく、より大統計化する今後のあらゆる物理解析において必須となる技術の基礎を固めたという点で重要な成果となった。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (31 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (17 results) Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results) Presentation (8 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results) Remarks (4 results)

  • [Int'l Joint Research] Oxford University/Cambridge University/Rutherford Appleton Laboratory(英国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Laurence Berkeley National Laboratory(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] CERN/University of Geneva(スイス)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] University of Genoa(イタリア)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Weizmann Inst. of Sci.(イスラエル)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] 欧州原子核研究機構(CERN)(スイス)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] オックスフォード大学(英国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] CERN(スイス)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] INFN Sapienza Univ. of Rome/INFN Univ. of Genova(イタリア)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Univ. of Wisconsin(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Oxford University(英国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Max Planck Institute(ドイツ)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] 欧州原子核研究機構(CERN)(スイス)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] オックスフォード大学(英国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] モントリオール大学(カナダ)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] DESY(ドイツ)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Calibration of the light-flavour jet mistagging efficiency of the b-tagging algorithms with Z+jets events using 139 fb^(-1) of ATLAS proton proton collision data at sqrt{s} = 13 TeV2023

    • Author(s)
      ATLAS Collaboration
    • Journal Title

      The European Physical Journal C

      Volume: 83 Issue: 8

    • DOI

      10.1140/epjc/s10052-023-11736-z

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] ATLAS flavour-tagging algorithms for the LHC Run 2 pp collision dataset2023

    • Author(s)
      ATLAS Collaboration
    • Journal Title

      The European Physical Journal C

      Volume: 83 Issue: 7

    • DOI

      10.1140/epjc/s10052-023-11699-1

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] LHC-ATLAS実験におけるシリコンストリップ検出器のモニタリングツール開発2024

    • Author(s)
      泉尾翼
    • Organizer
      日本物理学会2024年春季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Impact of using truth tagging in the Higgs to charm quark decay search at the LHC-ATLAS experiment2023

    • Author(s)
      Lakmin Wickremasinghe, Hajime Nanjo, Minoru Hirose, Tatsuya Masubuchi, Francesco A.Di Bello, Martino Tanasini, Andrea Coccaro, Nilotpal Kakati
    • Organizer
      日本物理学会第78回年次大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Development and commissioning of the LHC-ATLAS Semiconductor Tracker Performance Analysis Tool2023

    • Author(s)
      Lakmin Wickremasinghe, Hajime Nanjo, Minoru Hirose, Shigeki Hirose, Hidetoshi Otono, ATLAS SCT Collaboration
    • Organizer
      日本物理学会2023年春季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 高輝度LHCとATLAS検出器高度化の最前線から~ 着々と進む高輝度実験に向けた準備と物理の展望2023

    • Author(s)
      廣瀬穣
    • Organizer
      日本物理学会2023年春季大会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Properties of the Higgs boson at the LHC (ATLAS+CMS)2022

    • Author(s)
      Minoru Hirose
    • Organizer
      Interplay between Particle and Astroparticle Physics 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Graph Neural Network (GNN) based Truth-tagging Tool in ATLAS2022

    • Author(s)
      Lakmin Wickremasinghe
    • Organizer
      14th International Workshop on Boosted Object Phenomenology, Reconstruction and Searches in HEP
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Jet tagging efficiency parametrization using Graph Neural Networks for Higgs to charm-quark decay analysis in the LHC-ATLAS experiment2022

    • Author(s)
      Lakmin Wickremasinghe, 南條創, 廣瀬穣, 増渕達也, Francesco Di Bello, Nilotpal Kakati, Amy Tee, Martino Tanasini
    • Organizer
      日本物理学会第77回年次大会(2022年)(オンライン)
    • Related Report
      2021 Research-status Report
  • [Presentation] LHC-ATLAS実験シリコンストリップ検出器の性能モニタツールの開発2021

    • Author(s)
      岩田和志, 南條創, 廣瀬穣, 音野瑛俊, 廣瀬茂輝, 山内大輝, 他アトラスSCTグループ
    • Organizer
      日本物理学会第76回年次大会(2021年)
    • Related Report
      2020 Research-status Report
  • [Remarks] ATLAS実験公表結果

    • URL

      https://twiki.cern.ch/twiki/bin/view/AtlasPublic

    • Related Report
      2023 Annual Research Report
  • [Remarks] 研究室ウェブページ

    • URL

      https://osksn2.hep.sci.osaka-u.ac.jp/

    • Related Report
      2023 Annual Research Report
  • [Remarks] 所属研究室のWebページ

    • URL

      https://osksn2.hep.sci.osaka-u.ac.jp

    • Related Report
      2021 Research-status Report
  • [Remarks] ATLAS実験の公表結果のWebページ

    • URL

      https://twiki.cern.ch/twiki/bin/view/AtlasPublic

    • Related Report
      2021 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2025-01-30  

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