Neutrino and Photon Propagation in a Medium with External Fields

具有外场的介质中的中微子和光子传播

• 批准号: 0139538
• 负责人: Jose Nieves
• 金额: $ 9万
• 依托单位: University of Puerto Rico-Rio Piedras
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-10-01 至 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0139538&HistoricalAwards=false
• 关键词: Neutrino; Photon; Propagation; Medium; External

This project extends and continues previous work on the behavior of photons and neutrinos in a medium. Concrete calculations to be performed include: (1) The effects of the presence of a magnetic field on neutrino damping rates due to the effects of the matter-induced electromagnetic couplings of the neutrino. These effect, independent of neutrino mixing, could provide a mechanism for pulsar kicks; (2) The imaginary part of the photon self-energy (from which the photon damping rate is determined)in a medium that contains, besides the usual background of charged particles, a background of neutrinos that moves, as a whole, relative to the stationary background. This type of system has been considered in connection with energy generation mechanisms in supernova explosions; (3) The photon self-energy in a medium with an external plane wave field to study chirality effects. This is a novel application of thermal field theory methods in the context of optical and condensed matter physics.The properties of photons and neutrinos in a medium, and their interactions, have been the subjects of continuous attention over the years because of they provide information about underlying processes in the environments in which they occur. This information can be important in various astrophysical and cosmological situations and in condensed matter and physical optics laboratory experiments. Apart from the details that are specific to the particular calculations and physical contexts of the calculations in this project, the treatment of these problems involve ideas, methods and techniques that can be useful in other branches of physics.

该项目扩展并继续了之前关于介质中光子和中微子行为的工作。 具体计算包括： (1) 由于中微子物质感应电磁耦合的影响，磁场的存在对中微子阻尼率的影响。这些效应与中微子混合无关，可以为脉冲星踢提供一种机制。 (2) 介质中光子自能的虚部（从中确定光子阻尼率），除了通常的带电粒子背景外，该介质还包含整体相对于静止背景移动的中微子背景。这种类型的系统已被认为与超新星爆炸中的能量产生机制有关。 (3) 具有外部平面波场的介质中的光子自能来研究手性效应。这是热场理论方法在光学和凝聚态物理背景下的新颖应用。介质中光子和中微子的性质及其相互作用多年来一直是人们持续关注的主题，因为它们提供了有关它们发生的环境中的基本过程的信息。这些信息在各种天体物理和宇宙学情况以及凝聚态和物理光学实验室实验中可能很重要。除了本项目中特定计算和计算的物理背景所特有的细节之外，这些问题的处理还涉及可用于物理学其他分支的想法、方法和技术。