Search for the new particles using the top-quark productions and decays

2015 Fiscal Year Final Research Report

• Project Area: Particles Physics opening up the Tera-scale horizon using LHC
• Project/Area Number: 23104005
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Nagoya University
• Principal Investigator: TOMOTO Makoto 名古屋大学, 理学(系)研究科(研究院), 准教授 (80432235)
• Co-Investigator(Kenkyū-buntansha): YORITA Kohei 早稲田大学, 理工学術院, 准教授 (60530590) ; NAGANO Kunihiro 高エネルギー加速器研究機構, 素粒子原子核研究所, 准教授 (90391705)
• Co-Investigator(Renkei-kenkyūsha): NAGASAKA Yasushi 広島工業大学, 情報学部, 教授 (20299655) ; SHIMOJIMA Makoto 長崎総合科学大学, 情報学部, 教授 (80302347)
• Project Period (FY): 2011-04-01 – 2016-03-31
• Keywords: トップクォーク / 湯川結合 / 飛跡トリガー / LHC-ATLAS実験 / エネルギーフロンティア / 国際共同実験 / CERN

Outline of Final Research Achievements

We measured the total and differential cross-sections of the top-quark pair production precisely, using proton-proton collision of LHC-ATLAS experiment at CERN. We also measured the polarization of the W boson from the top-quark decays and found that our measurements are consistent with the V-A weak interaction predicted by the standard model of the particle physics. From these results, we concluded that the perturbative QCD can explain top-quark pair production up to 13TeV energy scale achieved by LHC. The fast tracking trigger for higher intensity LHC has been successfully introduced into the ATLAS detector.

Free Research Field

素粒子実験