QCD Epoch, Primordial Nucleosynthesis, and the Weak Interaction Physics of the Supernova Problem

QCD时代、原初核合成和超新星问题的弱相互作用物理

• 批准号: 9121623
• 负责人: George Fuller
• 金额: $ 16.42万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-03-15 至 1996-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9121623&HistoricalAwards=false
• 关键词: QCD; Epoch; Primordial; Nucleosynthesis; Weak

This grant supports basic theoretical research in nuclear/particle astrophysics. One part of the project will study the dynamics of a QCD phase transition in the context of the evolution of the early universe. Particular attention will be paid to the heat and baryon transport and the evolution of the fluid velocity field, as these will influence the subsequent calculation of nuclear abundances. A second part deals with the weak interaction physics required for understanding the lepton distributions produced by supernovae explosions. The shock wave re-heating problem will be studied together with the effects of allowing conversion between different types of neutrinos. The QCD quark-gluon plasma phase is a new form of matter predicted by our current theoretical understanding of the strong interaction. It is conjectured to have existed at the earliest moments of the big-bang creation of the universe. Supernovae are the pressure cookers which produce the nuclear matter in the universe but their mechanisms are not fully understood. The problem of neutrino conversion goes beyond the current theoretical framework for the weak interaction and is related to a critical gap in our understanding of neutrinos produced by the Sun.

该补助金支持基础理论研究， 核/粒子天体物理学 该项目的一部分将 研究QCD相变的动力学， 早期宇宙的演化 特别注意 将支付给热量和重子运输， 流体速度场的演变，因为这些将影响 随后计算核丰度。 第二 部分涉及弱相互作用物理所需的 了解超新星产生的轻子分布 爆炸 将研究激波再加热问题 以及允许在 不同类型的中微子。 QCD夸克-胶子等离子体相是一种新的物质形式 根据我们目前的理论理解， 强互动。 它被证明存在于 大爆炸创造宇宙的最早时刻 超新星是产生核的压力锅 宇宙中的物质，但它们的机制并不完全 明白 中微子转换的问题不仅仅是 弱相互作用的现有理论框架， 与我们对中微子理解的一个关键空白有关 太阳产生的。