R&D of large size tracking detectors for the experiment searching for Majorana neutrino

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K05112
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: ISHIHARA Nobuhiro 大学共同利用機関法人高エネルギー加速器研究機構, その他部局等, 名誉教授 (50044780)
• Co-Investigator(Kenkyū-buntansha): 川井 正徳 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, 技師 (50391735)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: マヨラナニュートリノ / 二重ベータ崩壊 / 運動量測定器 / ドリフトチェンバー / 超伝導ソレノイド磁石

Outline of Final Research Achievements

Majorana nature, which means no difference between material and anti-material, is realistically confirmed by only the experimental discovery of neutrinoless double beta decay in nuclei. This research is an R&D project to construct a large scale momentum analyzer that can measure the momentum of each beta-ray emitted from the nuclear double beta decay. The project is the only one searching for neutrinoless double beta decay by measuring a beta-ray momentum all over the world. This method can extremely reduce the backgrounds in searching for neutrinoless double beta decay events better than the energy measurement method using calorimetry.

Free Research Field

素粒子物理