arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0807.1421nucl-th
收藏

三维三体散射Faddeev方程的一种新解法

A New Approach to the 3D Faddeev Equation for Three-Body Scattering

Ch. Elster, W. Gloeckle, H. Witala

摘要:

提出了一种求解任意能量三体散射Faddeev方程的新方法。这种方法解开了自由三核子传播子的复杂奇异性结构,导致标准处理中的移动奇异性和对数奇异性。Faddeev方程是在动量空间中制定的,并直接求解动量矢量,而不采用分波分解。我们所用的全同玻色子的法捷耶夫方程,其最简单的形式是一个包含五个变量的积分方程,即相对动量和角度的大小。自由传播子和氘核传播子的奇点现在都是两个不同动量变量的简单极点,因此都可以用标准技术积分。

英文摘要:

A novel approach to solve the Faddeev equation for three-body scattering at arbitrary energies is proposed. This approach disentangles the complicated singularity structure of the free three-nucleon propagator leading to the moving and logarithmic singularities in standard treatments. The Faddeev equation is formulated in momentum space and directly solved in terms of momentum vectors without employing a partial wave decomposition. In its simplest form the Faddeev equation for identical bosons, which we are using, is an integral equation in five variables, magnitudes of relative momenta and angles. The singularities of the free propagator and the deuteron propagator are now both simple poles in two different momentum variables, and thus can both be integrated with standard techniques.

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。

↑