相对论与低能与低能之谜
Relativity and the low energy nd Ay puzzle
摘要：
我们解决的Faddeev方程在一个确切的庞加莱不变量制定的三核子问题。动力学输入是一个相对论性的核子-核子相互作用，它与高精度的CDBonn神经网络相互作用在壳层上完全等价。S-矩阵团簇性质决定了如何将两体动力学嵌入到三核子质量算符中。我们发现，对于中子实验室能量超过20兆电子伏的相对论效应的Ay是可以忽略的。对于低于20 MeV的能量，动力学效应使核子分析功率最大值略微降低2%，维格纳旋转使其进一步降低高达10%，从而增加了数据与理论之间的不一致。这表明，三核子力必须提供一个更大的增加Ay最大值比预期到现在为止。
英文摘要：
We solve the Faddeev equation in an exactly Poincare invariant formulation of the three-nucleon problem. The dynamical input is a relativistic nucleon-nucleon interaction that is exactly on-shell equivalent to the high precision CDBonn NN interaction. S-matrix cluster properties dictate how the two-body dynamics is embedded in the three-nucleon mass operator. We find that for neutron laboratory energies above 20 MeV relativistic effects on Ay are negligible. For energies below 20 MeV dynamical effects lower the nucleon analyzing power maximum slightly by 2% and Wigner rotations lower it further up to 10 % increasing thus disagreement between data and theory. This indicates that three-nucleon forces must provide an even larger increase of the Ay maximum than expected up to now.
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。
