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.

宇宙中物质相对反物质的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“轻中微子的性质与宇宙学物质反物质不对称性之间的联系”的“轻子发生”机制是正确的解释。因此，中微子质量必须符合当前测量的严格上限，并在未来实验室实验和观测宇宙学的范围内。轻子发生理论连接了多个前沿研究领域，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，最先进的轻子发生计算依赖于近似值，其中忽略了潜在重要的量子和热力学修正。拟议研究的目标是超越这种近似并达到完全一致的量子力学描述。多粒子量子系统远离热平衡的时间演化可以用施温格-戴森形式一致地描述。这种形式主义将被系统地研究并应用于早期宇宙宇宙学。该提案的另一个补充目标是进一步研究轻子发生机制对低能物理的现象学影响。鉴于当前和未来的粒子物理和中微子实验可能对轻子发生提供有趣的限制，这一点尤其重要。