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

2017 Fiscal Year Final Research Report

• 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
• 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

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.

Free Research Field

素粒子実験