Synthetic Studies on Neutrino Physics

中微子物理综合研究

基本信息

批准号：
08304022
负责人：
SUZUKI Atsuto
金额：
$ 12.93万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

项目摘要

The purpose of the research is to promote synthetic studies on neutrino physics based on the examination of various experimental methods and theoretical tools. Following results have been obtained in the three years of the project term.Purpose 1. [Investigation of the long base-line neutrino oscillation experiments using accelerators and reactors] As for the accelerator-based long base-line neutrino oscillation experiment, preparation of the K2K experiment in which neutrino beams are shot on the SuperKamiokande has progressed ; construction of the neutrino beam line and the front detector has been over and the experiment has been entered into the beam tuning. The experiment will be started within 12 months. The neutrino oscillation experiment, KamLAND, which measures the anti-neutrino flux from reactors using a 1000ton liquid scintillator detector has finished the development of the 17-inch high performance photo-multiplier tube and started the mass production. Studies and developments … More of the liquid scintillator and the-plastic vessel for the liquid scintillator have made a good progress. The start of the experiments aimed in 2001Purpose 2. [Studies on short base-line neutrino oscillation experiments with accelerators and reactors] Data analysis of the CHORUS experiment which is a collaboration of Nagoya university and European institutes has made a progress and they reported results of the nu_e-nu_e oscillation to provide a new area of exclusion of neutrinooscillation parameters.Purpose 3. [Experimental and theoretical studies on the anomaly of the atmospheric neutrino) SuperKamiokande has reported the results on the zenith angle distribution of electrons and muons produced by nu_e and nu_<zeta> and showed the decrease of the muons according to the flight distance. This indicates the nu_<mu>-_<zeta> oscillation and is a big discovery to show the finite mass of the tau-neutrino.Purpose 4. [Experimental and theoretical studies on the solar neutrino deficit] SuperKamiokandehas made analyses of the overwhelmingly high statistics data and strongly restricted the solution of the solar neutrino deficit problem. From now on it aims to discover the nu_<epsilon> nu_<mu> oscillation by furtheraccumulationof the data.During the three years of the project term research meetings attended by several tens of researchers were held every year at Miyako, Hachimantai and O-funato to report the results and make discussions and investigations to plan promotion of the studies. Less

该研究的目的是在对各种实验方法和理论工具进行检验的基础上，促进中微子物理的综合研究。项目期限三年，取得了以下成果。目的 1. [长基线研究] [使用加速器和反应堆的中微子振荡实验] 加速器长基线中微子振荡实验，中微子束发射到K2K实验的准备SuperKamiokand已经取得进展，中微子束流线和前端探测器的建设已经完成，实验已进入束流调谐阶段，实验将在12个月内开始，测量反中微子的中微子振荡实验。采用千吨级液体闪烁体探测器的反应堆通量已完成17英寸高性能光电倍增管的研制并开始批量生产……更多液体闪烁体和液体闪烁体塑料容器的研究取得了良好的进展。 2001年开始的实验目的2. [加速器和反应堆短基线中微子振荡实验的研究] CHORUS实验的数据分析。名古屋大学和欧洲研究机构的合作取得了进展，他们报告了 nu_e-nu_e 振荡的结果，提供了一个新的领域目的3. [大气中微子异常的实验和理论研究] SuperKamiokande报道了nu_e和nu_<zeta>产生的电子和μ子的天顶角分布结果，并显示了中微子的减小μ 子根据飞行距离计算，这表明了 nu_<mu>-_<zeta> 振荡，是显示有限性的重大发现。目的4.【太阳中微子赤字的实验和理论研究】SuperKamiokande对极高的统计数据进行了分析，限制了太阳中微子赤字问题的解决，今后的目标是发现nu_中微子。 <epsilon> nu_<mu> 通过进一步积累数据而产生振荡。在项目的三年期间，召开了由数十名研究人员参加的研究会议每年在宫古、八幡平、大船渡等地报告研究结果，并进行讨论和调查，规划研究的推进。