Probing new physics through precision measurement of anomalous magnetic moment of tau lepton

2015 Fiscal Year Final Research Report

• Project/Area Number: 23244045
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: The University of Tokyo
• Principal Investigator: Aihara Hiroaki 東京大学, 理学(系)研究科(研究院), 教授 (60167773)
• Co-Investigator(Renkei-kenkyūsha): EPIFANOV Denis 東京大学, 大学院理学系研究科, 特任研究員 (70645746) ; IWASAKI Masako 大学共同利用機関法人高エネルギー加速器研究機構, 加速器研究施設, 准教授 (70345172) ; NAKAYAMA Hiroyuki 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 助教 (10587900)
• Project Period (FY): 2011-04-01 – 2016-03-31
• Keywords: 素粒子実験 / Bファクトリー / タウレプトン / 異常磁気能率

Outline of Final Research Achievements

Searching for physics beyond the Standard Model has the highest priority in the research of particle physics. We have searched for the effects of new physics based on precision measurements of decay parameters of tau weak decay. Because tau is the heaviest lepton and physics beyond the Standard Model is expected to manifest itself in the heavy particle system particularly, this search has a unique significance. Using data of about 0.9 billion tau events collected by the Belle experiment, we measured decay parameters with the precision improved over previous measurements by an order of magnitude. We also successfully developed a new electromagnetic calorimeter prototype, a key detector component to be used in the upgraded Belle experiment.

Free Research Field

素粒子物理学実験