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arXiv 1101.4053nucl-th
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相对论性三核子Faddeev计算中的三核子力

Three-nucleon force in relativistic three-nucleon Faddeev calculations

H. Witala, J. Golak, R. Skibinski, W. Glockle, H. Kamada, W. N. Polyzou

摘要:

我们扩展我们的相对论性三核子Faddeev方程的制定,包括成对的相互作用和一个三核子力。精确的庞加莱不变性是通过将相互作用添加到非相互作用系统的质量Casimir算符(静止哈密顿量)而不改变自旋Casimir算符来实现的。这是通过使用由旋转不变内核定义的相互作用来实现的,旋转不变内核是内部动量变量和经历相同维格纳旋转的单粒子自旋的函数。为了求解所得到的方程,需要在动量空间分波基中具有这些性质的三核子力的矩阵元。我们提出了两种计算具有这些性质的三核子力的矩阵元的方法。对于一些例子,我们表明,在较高的能量,相对论和三核子力的影响是不可忽略的,一个一致的治疗都需要正确地分析数据。

英文摘要:

We extend our formulation of relativistic three-nucleon Faddeev equations to include both pairwise interactions and a three-nucleon force. Exact Poincare invariance is realized by adding interactions to the mass Casimir operator (rest Hamiltonian) of the non-interacting system without changing the spin Casimir operator. This is achieved by using interactions defined by rotationally invariant kernels that are functions of internal momentum variables and single-particle spins that undergo identical Wigner rotations. To solve the resulting equations one needs matrix elements of the three-nucleon force with these properties in a momentum-space partial-wave basis. We present two methods to calculate matrix elements of three-nucleon forces with these properties. For a number of examples we show that at higher energies, where effects of relativity and of three-nucleon forces are non-negligible, a consistent treatment of both is required to properly analyze the data.

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