Neutrino 2020: Theory Outlook

中微子研究理论综述与展望

Theory overview on neutrino studies and outlook

本文针对大型强子对撞机前向中微子研究这一新兴方向，综述了中微子性质、质量与相互作用相关问题，介绍了Run 3及高亮度运行阶段的最新预测，强调其跨领域价值与研究潜力。

Tau Physics 2006：总结与展望

Tau Physics 2006: Summary & Outlook

在TAU 2006上展示了大量的新成果。本文扼要地介绍了这次研讨会的主要内容，轻子物理学中几个选定课题（普适性、QCD检验、τ衰变中的V_{us}测定、g-2、中微子振荡、轻子味破坏）的现状和今后改进的前景。

The KATRIN Experiment: Status and Outlook

The KATRIN experiment, presently under construction in Karlsruhe, Germany, will improve on previous laboratory limits on the neutrino mass by a factor of ten. KATRIN will use a high-activity, gaseous T2 source and a very high-resolution spectrometer to measure the shape of the high-energy tail of the tritium-decay beta spectrum. The shape measurement will also be sensitive to new physics, including sterile neutrinos and Lorentz violation. This report summarizes recent progress in the experiment.

总结和展望

Summary and Outlook

本摘要分为四个部分。在第一部分（新闻）中，我讨论了SuperKamiokande对大气中微子振荡的结果，以及宇宙学的最新结果。第二部分（精炼）集中在电弱测试，最近的结果在风味部门和探测QCD，以及寻找新的粒子。第三部分（第二部分）更深入地讨论了与中微子质量和混合有关的问题。最后，在最后一节（希望）中，我对该领域的短期和长期未来进行了反思。

Neutrino 2012: Outlook - theory

Ongoing developments in theory and phenomenology are related to the measured large value of 1-3 mixing and indications of significant deviation of the 2-3 mixing from maximal one. "Race" for the mass hierarchy has started and there is good chance that multi-megaton scale atmospheric neutrino detectors with low threshold (e.g. PINGU) will establish the type of hierarchy. Two IceCube candidates of the PeV cosmic neutrinos if confirmed, is the beginning of new era of high energy neutrino astronomy. Accumulation of data on solar neutrinos (energy spectrum, D-N asymmetry, value of $Δm^2_{21}$) may …

地面中微子振荡研究现状

Status of terrestrial neutrino oscillation searches

综述了利用反应堆和加速器研究中微子振荡的现状。展望了未来的长基线中微子振荡计划。

Prospects for Measurement of the Neutrino Mass Hierarchy

The unknown neutrino mass hierarchy -- whether the $ν_3$ mass eigenstate is the heaviest or the lightest -- represents a major gap in our knowledge of neutrino properties. Determining the hierarchy is a critical step toward further precision measurements in the neutrino sector. The hierarchy is also central to interpreting the next generation of neutrinoless double beta decay results, plays a role in numerous cosmological and astrophysical questions, and serves as a powerful model discriminant for theories of neutrino mass generation and unification. Various current and planned experiments cla…

Neutrino Masses and Mixing: A Little History for a Lot of Fun

In this talk I present my personal summary of the progress on the determination of the masses of the neutrinos and of the leptonic flavour mixing from the combined analysis of the experimental results.

中微子质量与新物理学

Neutrino Mass and New Physics

我们回顾了中微子质量和混合的现状和未来的前景，我们的理解。我们讨论了我们认为是最重要的观点，对中微子的合理和自然的情况下，什么可能有最大的希望，抛光的夸克和轻子的味道问题。我们着重讨论了与超对称性和大统一等粒子物理大图景相适应的跷跷板机制，为夸克和轻子的味问题提供了一个统一的途径。我们认为，在家庭的对称性相结合，这可能是在一个统一的理解味道之谜的核心。我们还讨论了其他新的物理学思想，如中微子在模型与额外的维度和可能的理论意义的不育中微子。我们概述了各种方案的一些测试。

Direct Measurements of Neutrino Mass

The turn of the 21st century witnessed a sudden shift in our fundamental understanding of particle physics. While the minimal Standard Model predicts that neutrino masses are exactly zero, the discovery of neutrino oscillations proved the Standard Model wrong. Neutrino oscillation measurements, however, do not shed light on the scale of neutrino masses, nor the mechanism by which those are generated. The neutrino mass scale is most directly accessed by studying the energy spectrum generated by beta decay or electron capture -- a technique dating back to Enrico Fermi's formulation of radioactiv…

What can CMB observations tell us about the neutrino distribution function?

Cosmic Microwave Background (CMB) observations have been used extensively to constrain key properties of neutrinos, such as their mass. However, these inferences are typically dependent on assumptions about the cosmological model, and in particular upon the distribution function of neutrinos in the early Universe. In this paper, we aim to assess the full extent to which CMB experiments are sensitive to the shape of the neutrino distribution. We demonstrate that Planck and CMB-S4-like experiments have no prospects for detecting particular features in the distribution function. Consequently, we …

Flavor structures of charged fermions and massive neutrinos

Most of the free parameters in the Standard Model (SM) -- a quantum field theory which has successfully elucidated the behaviors of strong, weak and electromagnetic interactions of all the known fundamental particles, come from the lepton and quark flavors. The discovery of neutrino oscillations has proved that the SM is incomplete, at least in its lepton sector; and thus the door of opportunity is opened to exploring new physics beyond the SM and solving a number of flavor puzzles. In this review article we give an overview of important progress made in understanding the mass spectra, flavor …

Future Experimental Programs

I was asked to discuss future experimental programs even though I'm a theorist. As a result, I present my own personal views on where the field is, and where it is going, based on what I myself have been working on. In particular, I discuss why we need expeditions into high energies to find clues to where the relevant energy scale is for dark matter, baryon asymmetry, and neutrino mass. I also argue that the next energy frontier machine should be justified on the basis of what we know, namely the mass of the Higgs boson, so that we will learn what energy we should aim at once we nail the Higgs…

相对论自旋动力学与磁学的现代课题

Modern topics in relativistic spin dynamics and magnetism

本论文从量子与经典视角研究相对论自旋动力学与磁学，提出磁四势模型统一磁矩理论，并应用于早期宇宙等离子体磁化及中微子电磁性质研究。