A search of new physics by measurement of properties of the Higgs boson

• Project/Area Number: 26800140
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Kyushu University
• Principal Investigator: Oda Susumu 九州大学, 理学研究院, 助教 (10613515)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: ヒッグス粒子 / LHC加速器 / ATLAS実験 / 4レプトンチャンネル / 素粒子の標準模型を超える新物理 / 国際研究者交流 / CERN / 素粒子標準模型を超える新物理 / LHC

Outline of Final Research Achievements

Proton-proton collision data at the center of mass energy of 13 TeV at the LHC accelerator of CERN were taken by the ATLAS experiment from 2015 to 2017. About 60 Higgs bosons were observed with the data taken by 2016 in the 4-lepton channel, where a Higgs boson decays into a pair of gauge bosons (Z bosons) and then decay into four leptons. Measurement results of the differential production cross-section of the Higgs boson and coupling constants with other particles were published as papers. Observed values are consistent with the theoretical calculation values based on the Standard Model of particle physics within uncertainties and no physics phenomena beyond the Standard Model were found. The mass of the Higgs boson was measured with about 0.3% relative uncertainty in a preliminary result.

Research Products

• [Int'l Joint Research] 欧州原子核研究機構(CERN)/ジュネーブ大学/ベルン大学(スイス)
• [Int'l Joint Research]
• [Int'l Joint Research] CERN(欧州原子核機構)(スイス)
• [Int'l Joint Research]
• [Int'l Joint Research] CERN(欧州原子核機構)(スイス)
• [Int'l Joint Research]
• [Journal Article] Measurement of the Higgs boson coupling properties in the H→ZZ^*→4l decay channel at sqrt(s) = 13 TeV with the ATLAS detector (2018)
  • Author(s): M. Aaboud, K. Hanagaki, J. Tojo, F. Ukegawa, et al. [ATLAS Collaboration]
  • Journal Title: JHEP Volume: 1083 Issue: 3 Pages: 95-95
  • DOI: 10.1007/jhep03(2018)095
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Measurement of inclusive and differential cross sections in the H→ ZZ^*→4l decay channel in pp collisions at sqrt(s)=13 TeV with the ATLAS detector (2017)
  • Author(s): M. Aaboud, K. Hanagaki, J. Tojo, F. Ukegawa, et al. [ATLAS Collaboration]
  • Journal Title: JHEP Volume: 1710 Issue: 10 Pages: 132-132
  • DOI: 10.1007/jhep10(2017)132
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Study of the spin and parity of the Higgs boson in diboson decays with the ATLAS detector (2015)
  • Author(s): G. Aad, S. Oda et al. (ATLAS Collaboration)
  • Journal Title: The European Physical Journal C Volume: 75 Issue: 10 Pages: 476-476
  • DOI: 10.1140/epjc/s10052-015-3685-1
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Combined Measurement of the Higgs Boson Mass in pp Collisions at √s=7 and 8 TeV with the ATLAS and CMS Experiments (2015)
  • Author(s): G. Aad, S. Oda et al. (ATLAS Collaboration, CMS Collaboration)
  • Journal Title: Physical Review Letters Volume: 114 Issue: 19 Pages: 191803-191803
  • DOI: 10.1103/physrevlett.114.191803
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Constraints on the off-shell Higgs boson signal strength in the high-mass ZZ and WW final states with the ATLAS detector (2015)
  • Author(s): G. Aad, S. Oda et al. (ATLAS Collaboration)
  • Journal Title: The European Physical Journal C Volume: 75 Issue: 7 Pages: 335-335
  • DOI: 10.1140/epjc/s10052-015-3542-2
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Measurements of the Total and Differential Higgs Boson Production Cross Sections Combining the H→γγ and H→ZZ∗→4ℓ Decay Channels at √s=8  TeV with the ATLAS Detector (2015)
  • Author(s): G. Aad, S. Oda et al. (ATLAS Collaboration)
  • Journal Title: Physical Review Letters Volume: 115 Issue: 9 Pages: 091801-091801
  • DOI: 10.1103/physrevlett.115.091801
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Measurements of Higgs boson production and couplings in the four-lepton channel in pp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector (2015)
  • Author(s): ATLAS Collaboration
  • Journal Title: Physics Review D Volume: 91 Issue: 1 Pages: 012006-012006
  • DOI: 10.1103/physrevd.91.012006
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Measurement of the Higgs boson mass from the H→γγ and H→ZZ*→4l channels with the ATLAS detector at the LHC (2014)
  • Author(s): G. Aad et al. (ATLAS Collaboration)
  • Journal Title: Physical Review D Volume: 90 Issue: 5 Pages: 052004-052004
  • DOI: 10.1103/physrevd.90.052004
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Fiducial and differential cross sections of Higgs boson production measured in the four-lepton decay channel in pp collisions at √s = 8 TeV with the ATLAS detector (2014)
  • Author(s): G. Aad et al. (ATLAS Collaboration)
  • Journal Title: Physics Letters B Volume: 738 Pages: 234-253
  • DOI: 10.1016/j.physletb.2014.09.054
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] 超周辺衝突での光子・光子散乱 (2018)
  • Author(s): 織田勧
  • Organizer: 日本物理学会 第73回年次大会
  • Invited
• [Presentation] Couplings and mass with 13 TeV data (2017)
  • Author(s): Susumu Oda, On behalf of the ATLAS and CMS Collaborations
  • Organizer: 52nd Rencontres de Moriond EW 2017
  • Place of Presentation: La Thuile, Italy
  • Year and Date: 2017-03-19
  • Int'l Joint Research
• [Presentation] 2016年LHC13 TeV実験：実験状況とSM/Higgs測定 (2016)
  • Author(s): 織田 勧
  • Organizer: 日本物理学会2016年秋季大会
  • Place of Presentation: 宮崎大学
  • Year and Date: 2016-09-22
  • Invited
• [Presentation] LHC-ATLAS実験における$H\rightarrow ZZ^{(*)}\rightarrow 4\ell$チャンネルを用いたヒッグス粒子の測定 (2016)
  • Author(s): 織田勧
  • Organizer: 日本物理学会第71回年次大会
  • Place of Presentation: 東北学院大学
  • Year and Date: 2016-03-20
• [Presentation] 125 GeV ヒッグス粒子の最新実験成果 (2015)
  • Author(s): 織田勧
  • Organizer: 新学術領域研究会 テラスケール2015 先端加速器LHCが切り拓くテ ラスケールの素粒子物理学
  • Place of Presentation: 東京工業大学大岡山キャンパス
  • Year and Date: 2015-12-22
• [Presentation] Study of Higgs boson production in bosonic decay channels at the LHC (including off-shell production) (2015)
  • Author(s): Susumu Oda On behalf of the ATLAS and CMS
  • Organizer: 27th Rencontres de Blois on Particle Physics and Cosmology
  • Place of Presentation: Blois, France
  • Year and Date: 2015-06-03
  • Int'l Joint Research
• [Presentation] Higgs Boson - summary & perspective (2014)
  • Author(s): 織田勧
  • Organizer: 新学術領域研究会 テラスケール2014先端加速器LHCが切り拓くテラスケールの素粒子物理学
  • Place of Presentation: 大阪大学豊中キャンパス
  • Year and Date: 2014-11-27 – 2014-11-29
• [Remarks] 科学研究費 若手研究(B) ヒッグス粒子の性質測定による新物理の探索
  • URL: http://epp.phys.kyushu-u.ac.jp/~oda/wakate_b_2014/
• [Remarks] ATLAS Publications
  • URL: https://twiki.cern.ch/twiki/bin/view/AtlasPublic/Publications
• [Remarks] ATLAS Experiment Public Results
  • URL: https://twiki.cern.ch/twiki/bin/view/AtlasPublic