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Measurement of the Yukawa coupling in pp collisions with ATLAS detector

Research Project

Project/Area Number 15K17633
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionThe University of Tokyo

Principal Investigator

Masubuchi Tatsuya  東京大学, 素粒子物理国際研究センター, 助教 (20512148)

Project Period (FY) 2015-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywordsヒッグス粒子 / 湯川結合 / フェルミオン / ミューオン検出器 / MPGD / ガス検出器 / ヒッグス / LHC / ボトムクォーク / ATLAS / ミューオン
Outline of Final Research Achievements

A search for the decay of the Standard model Higgs boson into a bottom quark pair when produced in association with a W or Z boson is performed. The analyzed data, corresponding to an integrated luminosity of approximately 36/fb at a center-of-mass energy of 13 TeV which were collected in the ATLAS detector. An excess of events over the expected background from other Standard Model processes is found with an observed significance 3.5 sigma (an expected significance is 4.0 sigma). The measured signal strength, a ratio of the measured signal yield to the Standard model prediction, was 0.90+/-0.18(stat.)+0.21-0.19(syst.). That is consistent with the Standard model prediction and an evidence for the Higgs boson decay with bottom quark.
The MicroMegas with two dimensional readouts was produced and tested with radioactive sources and cosmic ray. A micro resistive WELL (μ-RWELL) with two dimensional readouts was designed and produced. The first signal was observed with the μ-RWELL.

Report

(4 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (37 results)

All 2018 2017 2016 Other

All Int'l Joint Research (18 results) Journal Article (7 results) (of which Int'l Joint Research: 7 results,  Peer Reviewed: 3 results,  Open Access: 4 results,  Acknowledgement Compliant: 1 results) Presentation (9 results) (of which Int'l Joint Research: 1 results,  Invited: 2 results) Remarks (3 results)

  • [Int'l Joint Research] パリ第6大学/LALオルセー研究所(フランス)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] フライブルグ大学/ボン大学/ミュンヘン大学(ドイツ)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] アイオワ大学/ニューヨーク州立大学/ハーバード大学(米国)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] リバプール大学/ロンドン大学/バーミンガム大学(英国)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] 中央研究院(台湾)

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

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] LALオルセー研究所/パリ第6大学(フランス)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] アイオワ大学/ニューヨーク州立大学/アイオワ州立大学(米国)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] コンドン大学/リバプール大学/バーミンガム大学(英国)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] 中央研究院(台湾)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] ボン大学/フライブルク大学(ドイツ)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research]

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] リバプール大学/バーミンガム大学/ロンドン大学(英国)

    • Related Report
      2015 Research-status Report
  • [Int'l Joint Research] パリ第6大学/オルセー線形加速器研究センター(フランス)

    • Related Report
      2015 Research-status Report
  • [Int'l Joint Research] フライブルグ大学/ボン大学/マックスプランク研究所(ドイツ)

    • Related Report
      2015 Research-status Report
  • [Int'l Joint Research] ハーバード大学/アイオワ大学/イリノイ大学(米国)

    • Related Report
      2015 Research-status Report
  • [Int'l Joint Research] 中央研究院(台湾)

    • Related Report
      2015 Research-status Report
  • [Int'l Joint Research]

    • Related Report
      2015 Research-status Report
  • [Journal Article] Search for the Dimuon Decay of the Higgs Boson in pp Collisions at √s=13TeV with the ATLAS Detector2017

    • Author(s)
      T. Masubuchi et al., The ATLAS collaboration
    • Journal Title

      Physical Review Letters

      Volume: 119 Issue: 5 Pages: 051802-051802

    • DOI

      10.1103/physrevlett.119.051802

    • 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
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Search for heavy resonances decaying into a W or Z boson and a Higgs boson in final states with leptons and b-jets in 36 fb-1 of √s=13 TeV pp collisions with the ATLAS detector2017

    • Author(s)
      T. Masubuchi et al., The ATLAS collaboration
    • Journal Title

      e-print arXiv:hep-ex

      Volume: CERN-EP-2017-250

    • Related Report
      2017 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Journal Article] Search for new resonaces decaying to a W or Z boson and a Higgs boson in the llbb, lνbb, and ννbb channels with pp collisions at √s = 13 TeV with the ATLAS detector2017

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

      Phys. Lett.

      Volume: B765 Pages: 32-52

    • DOI

      10.1016/j.physletb.2016.11.045

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Search for the dimuon decay of the Higgs boson in pp collisions at √s = 13 TeV with the ATLAS detector2017

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

      ATLAS conference note

      Volume: 14 Pages: 1-18

    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Journal Article] Search for the Standard Model Higgs boson produced in association with a vector boson and decaying to a bbbar pair in pp collisions at 13 TeV using the ATLAS detector2016

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

      ATLAS conference note

      Volume: 91 Pages: 1-35

    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Journal Article] Search for a CP-odd Higgs boson decaying to Zh in pp collisions at √s = 13 TeV with the ATLAS detector2016

    • Author(s)
      The ATLAS collaboration
    • Journal Title

      ATLAS conference note

      Volume: 015 Pages: 1-34

    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] LHC ATLAS実験における、VH (H->bb)事象の断面積測定に向けた背景事象の系統誤差の削減2018

    • Author(s)
      野口陽平
    • Organizer
      日本物理学会第73回年次大会(2018年)
    • Related Report
      2017 Annual Research Report
  • [Presentation] LHC-ATLAS実験 Run2におけるZh->llbbチャンネルを用いた新粒子探索2017

    • Author(s)
      加藤千曲
    • Organizer
      日本物理学会 第71回年次大会
    • Place of Presentation
      大阪大学(大阪府豊中市)
    • Year and Date
      2017-03-17
    • Related Report
      2016 Research-status Report
  • [Presentation] LHCでのヒッグス研究の最新結果2017

    • Author(s)
      増渕達也
    • Organizer
      基研研究会 素粒子物理学の進展 2017
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] 高放射線環境におけるMicromegas検出器の動作試験2017

    • Author(s)
      又吉康平
    • Organizer
      日本物理学会 2017年秋季大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] LHC-ATLAS実験におけるVH->bb事象を用いたヒッグス粒子探索2017

    • Author(s)
      増渕達也
    • Organizer
      日本物理学会 2017年秋季大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] LHC-ATLAS実験 Run2におけるZH->llbbチャンネルを用いた新物理探索2016

    • Author(s)
      加藤千曲
    • Organizer
      日本物理学会 2016年秋季大会
    • Place of Presentation
      宮崎大学 (宮崎県宮崎市)
    • Year and Date
      2016-09-22
    • Related Report
      2016 Research-status Report
  • [Presentation] MicroMEGASを用いた、抵抗電極による誘起電荷の拡散測定2016

    • Author(s)
      又吉康平
    • Organizer
      日本物理学会 2016年秋季大会
    • Place of Presentation
      宮崎大学 (宮崎県宮崎市)
    • Year and Date
      2016-09-21
    • Related Report
      2016 Research-status Report
  • [Presentation] Search for CP-odd Higgs boson decaying ZH in ATLAS at LHC Run22016

    • Author(s)
      増渕達也
    • Organizer
      Beyond the Standard Model Higgs Searches
    • Place of Presentation
      National Tsing Hua University, Taiwan
    • Year and Date
      2016-03-21
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] LHC-ATLAS 実験 Run2 における Zh->llbb 過程を用いた新粒子探索2016

    • Author(s)
      加藤千曲
    • Organizer
      日本物理学会第71回年次大会
    • Place of Presentation
      東北学院大学(宮城県仙台市)
    • Year and Date
      2016-03-19
    • Related Report
      2015 Research-status Report
  • [Remarks] 研究成果:学術雑誌論文ページ

    • URL

      http://www.icepp.s.u-tokyo.ac.jp/research/paper.html

    • Related Report
      2017 Annual Research Report
  • [Remarks] ATLAS Higgs Physics Public Results

    • URL

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

    • Related Report
      2016 Research-status Report
  • [Remarks] Search for a CP-odd Higgs boson

    • URL

      https://cds.cern.ch/record/2141003

    • Related Report
      2015 Research-status Report

URL: 

Published: 2015-04-16   Modified: 2022-08-18  

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