arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2306.01367nucl-th
收藏

检验核多体理论范式

Testing the Paradigm of Nuclear Many-Body Theory

Omar Benhar

AI总结:

本文利用大动量转移、低能量转移电子—核散射中的 y-scaling,检验核多体理论在高密度下的适用性,发现即使密度达到五倍核密度,核物质仍主要表现为核子集合。

摘要:

核多体理论建立在这样一个信条之上:核系统可以被准确描述为点状粒子的集合。这一图像虽然对大量已测量的原子核性质给出了极其准确的解释,但在高密度区域必然会失效,因为在该区域预计会有质子和中子以外的自由度发挥作用。要牢固确立用核子描述致密核物质的适用界限,就需要有关这种描述有效性的宝贵信息,而这些信息可以从大动量转移、低能量转移条件下的电子—原子核散射数据中获得。在这一运动学区域出现的 y-scaling(y 标度)明确表明,束流粒子与属于强关联对的高动量核子发生耦合;这说明,在高达五倍核密度——这是中子星内部的典型密度——的密度下,核物质在很大程度上仍表现为核子的集合。

英文摘要:

Nuclear many-body theory is based on the tenet that nuclear systems can be accurately described as collections of point-like particles. This picture, while providing a remarkably accurate explanation of a wealth of measured properties of atomic nuclei, is bound to break down in the high-density regime, in which degrees of freedom other than protons and neutrons are expected to come into play. Valuable information on the validity of the description of dense nuclear matter in terms of nucleons, needed to firmly establish its limit of applicability, can be obtained from electron-nucleus scattering data at large momentum transfer and low energy transfer. The emergence of y-scaling in this kinematic region, unambiguously showing that the beam particles couple to high-momentum nucleons belonging to strongly correlated pairs, indicates that at densities as large as five times nuclear density -- typical of the neutron star interior -- nuclear matter largely behaves as a collection of nucleons.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑