The main goal of the project is to arrive at a fully consistent quantum mechanical description of the evolution of the matter-antimatter asymmetry in the universe

该项目的主要目标是对宇宙中物质-反物质不对称性的演化得出完全一致的量子力学描述

• 批准号: 5443828
• 负责人: Dr. Michael Martin Plümacher
• 金额: --
• 依托单位: Max-Planck-Institut für Physik (Werner-Heisenberg-Institut)
• 依托单位国家: 德国
• 项目类别: Independent Junior Research Groups
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5443828?language=en
• 关键词: main; goal; project; arrive; fully

The preponderance of matter over antimatter in the universe is a long-standing cosmological problem. The recent experimental evidence for non-zero neutrino masses has boosted confidence that the mechanism of "leptogenesis", which relates properties of light neutrinos to the cosmological matter-antimatter asymmetry, is the correct explanation. As a consequence, neutrino masses must satisfy strict upper limits in accord with current measurements and within reach of future laboratory experiments and observational cosmology. The theory of leptogenesis connects several areas of leading-edge research, i.e. experimental and theoretical neutrino physics, early-universe cosmology, and thermal quantum field theory. State-of-the-art leptogenesis calculations of the production of a matter-antimatter asymmetry during the evolution of the early universe rely on approximations where potentially important quantum and thermodynamical corrections are omitted. The goal of the proposed research is to progress beyond this approximation and arrive at a fully consistent quantum mechanical description. The time evolution of a many-particle quantum system away from thermal equilibrium can be consistently described in the Schwinger-Dyson formalism. This formalism will be systematically studied and applied to early-universe cosmology. A complementary goal of the proposal is to further study the phenomenological implications of the leptogenesis mechanism for low-energy physics. This is particularly relevant in view of current and future particle physics and neutrino experiments that may provide interesting constraints on leptogenesis.

宇宙中物质比反物质占优势是一个长期存在的宇宙学问题。最近关于非零中微子质量的实验证据增强了人们的信心，即将轻中微子的性质与宇宙物质-反物质不对称性联系起来的“瘦身发生”机制是正确的解释。因此，中微子质量必须满足严格的上限，与目前的测量一致，并在未来的实验室实验和观测宇宙学的触手可及的范围内。瘦子发生理论连接了几个前沿研究领域，即实验和理论中微子物理、早期宇宙宇宙学和热量子场论。在早期宇宙演化过程中，物质-反物质不对称性的产生依赖于忽略了潜在重要的量子和热力学修正的近似。这项拟议的研究的目标是超越这一近似值，并得出完全一致的量子力学描述。远离热平衡的多粒子量子系统的时间演化可以一致地用Schwinger-Dyson形式描述。这一形式主义将被系统地研究并应用于早期宇宙宇宙学。该提议的一个补充目标是进一步研究瘦身发生机制对低能级物理的现象学影响。鉴于目前和未来的粒子物理和中微子实验可能会对瘦子发生提供有趣的限制，这一点特别相关。