Few Body Systems and Nuclear Forces II
Few Body Systems and Nuclear Forces II
复制标题
很少的身体系统和核力量 II
DOI：
10.1007/3-540-08917-9
复制
发表时间：
1978
期刊：
影响因子：
--
通讯作者：
H. Zankel
中科院分区：
文献类型：
--
作者：
H. Zingl;M. Haftel;H. Zankel
在过去的20年里，我们已经看到了关于“少数身体”问题的能量、范围和思想的相当大的扩展。早期的会议主要集中在由两体非相对论势介导的低能二核子和三核子过程。虽然这些问题仍然起着作用，但格拉兹会议对核力的主要强调是它与中间能量（即介子-核子）物理学甚至粒子物理学的关系。来自LAMPF、TRIUMF和SIN等介子工厂的数据对理论家提出了挑战，要求他们更彻底地研究”介子自由度”，这在理解400 MeV以上的NN数据方面将发挥重要作用。此外，在这些会议之一，夸克的作用在理解核力，特别是在短距离，第一次被认为是。传统的”低能量”制度已经经历了相当大的转变所示的工作在格拉兹。新的数据和相移分析已经澄清了许多与P波和张量NN相互作用相关的模糊性。在Nd系统中的偏振的工作已经激发了更复杂的三体散射代码与更高的分波的发展，分析均匀分裂偏振实验。自1976年德里会议以来，三体方法也被应用于更复杂的系统，而三体方法曾经只适用于3 N问题。在格拉兹报告的进展既涉及实际方面（如广告分手计算）和理论方面（如介绍的方式，包括N体计算，承诺一些希望被应用的少体方法）。甚至曾经令人生畏的四体问题的“精确”解也受到了充分的攻击。在其他领域，特别是原子和分子物理学中，也开始包括少体问题。虽然在格拉兹会议上对这些领域的贡献不大（沿着在德里会议上的几项贡献），但已经有了一个开端，承诺在今后的会议上作出更多的贡献。
The past twenty years have seen a considerable broadening in energy, scope and thought regarding" Few Body" problems. The early conferences concentrated mainly on low energy two and three nucleon processes mediated by two-body, non-relativistic potentials. While these problems still play a role, the main emphasis in the Graz conference vis à vis the nuclear force was its relation to intermediate energy (that is meson-nucleon) physics and even particle physics. Data from meson factories like LAMPF, TRIUMF and SIN have challenged theorists to investigate more thoroughly the" meson degrees of freedom" which promise to play an essential role in understanding the NN data above 400 MeV. Also, for the first time at one of these conferences, the role of quarks in understanding the nuclear force, especially at short distances, was considered.The traditional" low energy" regime has undergone considerable transformation as indicated by the work presented at Graz. New data and phase-shift analyses have clarified many of the ambiguities associated with the P-wave and tensor NN interaction. The work on polarization in the Nd system has motivated the development of more sophisticated three-body scattering codes with higher partial waves, to analyze even breakup polarization experiments. The period since the 1976 Delhi conference has also witnessed the application of three-body methods, once applied only to the 3N-problem, to more complex systems. Progress reported in Graz involved both a practical side (such as ad breakup calculations) and theoretical side (such as presentation of ways of including few-body methods in N body calculations which promise some hope of being applied). Even the once forbidding" exact" solution of the four body problem has been amply attacked. A beginning has also been made to include few-body problems in other fields notably atomic and molecular physics. While the contributions at Graz in these fields have been modest (along with a couple of contributions in Delhi) a beginning has been made with the promise of more in future conferences.