Investigation of Neutrino Oscillation Phenomena toward Determination of Structure of Lepton Flavor Mixing

中微子振荡现象对轻子风味混合结构测定的研究

基本信息

批准号：
16340078
负责人：
MINAKATA Hisakazu
金额：
$ 8.58万
依托单位：
Tokyo Metropolitan University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16340078/
关键词：
Neutrino oscillation Flavor mixing Hierarchy of neutrino masses CP violation MSW mechanism Non-standard neutrino interactions Long-baseline neutrino experiments Reactor neutrino experiments CP非共存 MSW機構超新星ニュートリノ CPT対称性ニュートリノ質量パ

项目摘要

1. We have proposed a concrete setting for determination of CP violating phase and neutrino mass hierarchy, called the Tokai to Kamioka-Korea (T2KK), in which an intense neutrino beam from J-PARC located in Tokai village is received by the identical two detectors, one placed in Kamioka and the other in Korea with each 0.5 megaton water. We have shown that T2KK can resolve the eight-fold parameter degeneracy and can determine all the unknown elements of MNS matrix to the accuracy comparable to those achieved by other project proposed in the world, e.g., the neutrino factory, as far as the mixing angle theta_13 exists within the region of sensitivity of the next generation long-baseline experiments such as T2K (Tokai-to-Kamioka). Toward the realization of this idea, the two international workshops were held in Seoul, Korea, in 2005 and 2006. T2KK is considered to be one of the good candidates for future project beyond T2K. We have also put forward the theoretical understanding of the pro … More perty of parameter degeneracy by uncovering the property called "decoupling between the degeneracies" which implies that each two pair of the degeneracies can be resolved independent of the presence of the other degeneracies.2. In 2003 wo have proposed idea of reactor experiments for measuring theta_13 by using the near-far identical two detector setting as a pure measurement of theta_13. We then suggested that the theta_23 degeneracy can be resolved by the reactor-accelerator combined method. Based on this idea and in collaboration with the two T2K experimentalists, we have examined in detail the sensitivity of resolving the theta_23 degeneracy that can be achieved by the method. The results indicates that the resolving power of the theta_23 degeneracy by this method is greater than any other methods proposed so far in region of relatively large theta_13, sin~2 2theta_13 > 0.5-0.6.3. The head investigator proposed (with Alexei Smirnov) the new concept called the "quark-lepton complementarity" (QLC) based on a hint given by experimental data that the Cabibbo angle and the solar angles add up to ji/4. It may imply a new approach to the problem of how quarks and leptons are unified. We have constructed some concrete scenarios on how QLC can be embedded into grand unified theories, and proposed how they can be tested experimentally. All of them involve a novel feature that there is the maximal angle in the (1-2) sector of the lepton flavor mixing. Less

1。我们提出了一个混凝土设置，用于确定CP违反阶段和神经元的质量等级，称为Tokai到Kamioka-Korea（T2KK），其中在Kamioka和Kamioka water中接收了一个相同的两个检测器，其中一个位于Tokai村的J-PARC的强烈神经元束，每个0.5 sorgat in 0.5 sorgat。我们已经表明，T2KK可以解决八倍的参数退化，并可以确定MNS矩阵的所有未知要素与准确性与世界上其他项目所实现的精度相媲美，例如，神经元工厂，就下一代长期托管的敏感性而言，theTA_13的混合角度theta_13属于theTa_13，例如THETA_13。为了实现这一想法，这两个国际研讨会于2005年和2006年在韩国首尔举行。T2KK被认为是超越T2K的未来项目的好候选人之一。我们还提出了对Pro的理论理解……通过发现称为“变性之间解耦”的特性，这本身是参数退化的本身，这意味着可以独立于存在其他脱脂性的情况下解决每两对脱生。2。在2003年，WO提出了反应堆实验的想法，用于通过使用近乎固定的两个检测器设置作为THETA_13的纯度测量，以测量THETA_13。然后，我们建议可以通过反应器加速器合并方法来解决Theta_23归化护理。基于这个想法并与两位T2K实验者合作，我们详细介绍了解决该方法可以实现的THETA_23脱位护理的敏感性。结果表明，通过这种方法，Theta_23退化护理的分解能力比迄今为止在相对较大的Theta_13区域，SIN〜2 2 Theta_13> 0.5-0.6.3的任何其他方法都要大。首席调查员提出了基于实验数据给出的提示，即Cabibbo角度和太阳角添加到JI/4。这可能意味着解决夸克和叶子如何统一的问题的新方法。我们已经构建了一些有关如何将QLC嵌入大统一理论的具体场景，并提出了如何通过实验测试它们。所有这些都涉及一个新颖的功能，即Lepton风味混合的（1-2）扇区中有最大角度。较少的

项目成果

期刊论文数量（123）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Solar neutrino measurements in Super-Kamiokande-I

DOI：
10.1103/physrevd.73.112001
发表时间：
2006-06-01
期刊：
PHYSICAL REVIEW D
影响因子：
5
作者：
Hosaka, J.;Ishihara, K.;Wilkes, R. J.
通讯作者：
Wilkes, R. J.

Atmospheric neutrinos

DOI：
10.1088/1742-6596/718/5/052014
发表时间：
2006-12
期刊：
Journal of Physics: Conference Series
影响因子：
0
作者：
T. Gaisser
通讯作者：
T. Gaisser

Determining neutrino mass hierarchy by precision measurements in electron and muon neutrino disappearance experiments

DOI：
10.1103/physrevd.74.053008
发表时间：
2006-07
期刊：
Physical Review D
影响因子：
5
作者：
H. Minakata;H. Nunokawa;S. Parke;R. Funchal
通讯作者：
H. Minakata;H. Nunokawa;S. Parke;R. Funchal

Resolving Eight-Fold Neutrino Parameter Degeneracy by Two Identical Detectors with Different Baselines

通过具有不同基线的两个相同探测器解决八倍中微子参数简并性

DOI：
发表时间：
2007
期刊：
Physical Review D 75
影响因子：
0
作者：
T.Kajita;H.Minakata;S.Nakayama;H.Nunokawa
通讯作者：
H.Nunokawa

[K2K Collaboration], Measurement of the quasi-elastic axial vector mass in neutrino oxygen interactions

[K2K Collaboration]，中微子氧相互作用中准弹性轴矢量质量的测量

DOI：
发表时间：
2006
期刊：
Physical Review D 74
影响因子：
0
作者：
H.Sugiyama;O.Yasuda;F.Suekane;G.A.Horton-Smith;K.Abe et al.;K.Abe et al.;M.H.Ahn et al.;M.E.C.Swanson et al.;J.Hosaka et al.;R.Gran et al.
通讯作者：
R.Gran et al.