论文标题
对低能量的三个和四个中子系统的全面研究
A Comprehensive Study of the Three- and Four-Neutron Systems at Low Energies
论文作者
论文摘要
这项工作介绍了使用绝热性超透明方法在低能制度中对三个和四个中子系统的进一步分析。在我们以前的物理中。莱特牧师。文章（物理学修订版125，052501（2020）），在绝热近似中对这些中子系统的低能行为进行了处理，忽略了脱离脱节的非绝热耦合。通过对散射连续阈值附近的三个和四个中子散射的多通道处理，对状态的密度进行了彻底的分析，没有显示低能量时4N共振的证据。对最低绝热性超球电位的远程行为的详细分析表明，有一个有吸引力的$ρ^{ - 3} $通用行为，它在多渠道散射的低能性状态中占主导地位。这种远程行为导致$ e \ rightarrow0 $的状态密度的不同行为，这可能解释了Kisamori等人在2016年实验中观察到的低能信号。 （Phys。Rev.Lett。116，052501（2016））。
This work presents further analysis of the three- and four-neutron systems in the low energy regime using adiabatic hyperspherical methods. In our previous Phys. Rev. Lett. article (Phys. Rev. Lett. 125, 052501 (2020)), the low-energy behavior of these neutron systems was treated in the adiabatic approximation, neglecting the off-diagonal non-adiabatic couplings. A thorough analysis of the density of states through a multi-channel treatment of the three-and four-neutron scattering near the scattering continuum threshold is performed, showing no evidence of a 4n resonance at low energy. A detailed analysis of the long-range behavior of the lowest few adiabatic hyperspherical potentials shows there is an attractive $ρ^{-3}$ universal behavior which dominates in the low-energy regime of the multi-channel scattering. This long-range behavior leads to a divergent behavior of the density of state for $E\rightarrow0$ that could account for the low-energy signal observed in the 2016 experiment by Kisamori et al. (Phys. Rev. Lett. 116, 052501 (2016)).
