论文标题
无促进有效场理论中的几个核子散射
Few nucleons scattering in pionless effective field theory
论文作者
论文摘要
我们提出了一项全面的理论研究，该研究对具有$ a \ leq 4 $的系统的低能量少量核能散射。为此，我们利用了我们在接下来的领先顺序采用的无挑选有效田地理论。我们表明，在此级别，理论对所有研究的通道中的低能散射参数产生了准确的预测。这些预测与最佳的实验评估和可用的理论计算相当。我们确认了最近的观察结果，即在近代领先地阶时需要四体力，并发现它仅出现在单个自旋 - 伊斯波丁通道中。
We present a comprehensive theoretical study of low-energy few nucleon scattering for systems with $A\leq 4$. To this end, we utilize pionless effective field theory, which we employ at next-to-leading order. We show that at this level the theory yields accurate predictions for the low-energy scattering parameters in all studied channels. These predictions are on par with the best experimental evaluations and the available theoretical calculations. We confirm the recent observation that a four-body force is needed at next-to-leading-order and find that for nuclear systems it only appears in a single spin-isospin channel.
