近日，巴西马拉尼昂联邦大学的Fabiano C. Simas及其研究小组取得一项新进展。经过不懈努力，他们揭示几何约束存在时的扭结散射现象。相关研究成果已于2023年10月20日在国际知名学术期刊《高能物理杂志》上发表。

该研究团队探究了存在几何约束的两个标量场模型中的扭结-反扭结碰撞现象。该模型引入了一个辅助函数，用于改变与其中一个场相关的运动学。重要的是，其中一个场可以独立求解，从而改变第二个场的内部结构。研究人员进行了多次碰撞实验，并观察到了小参数值下的共振窗口的存在。

此外，研究人员还成功证明了振荡脉冲之间的交替出现，以及在几何约束更加明显的情况下扭结-反扭结对的湮灭和形成过程。对几何约束模型中扭结动力学的研究涉及畴壁形成和压力尺度下的磁化等关键问题。

附：英文原文

Title: Kink scattering in the presence of geometric constrictions

Author: Campos, Joo G. F., Simas, Fabiano C., Bazeia, D.

Issue&Volume: 2023-10-20

Abstract: We investigate kink-antikink collisions in a model characterized by two scalar fields in the presence of geometric constrictions. The model includes an auxiliary function that modifies the kinematics associated with one of the two fields. An important fact is that one of the fields can be solved independently, being responsible for changing the internal structure of the second one. We performed several collisions and observed the presence of resonance windows for small values of the parameters. Furthermore, we have been able to show the alternation between the appearance of oscillating pulses, as well as the annihilation and formation of kink-antikink pairs when the geometric constriction is more pronounced. The study of kink dynamics in models with geometric constrictions is connected with issues of interest such as domain wall formation and magnetization at the manometric scale.

DOI: 10.1007/JHEP10(2023)124

Source: https://link.springer.com/article/10.1007/JHEP10(2023)124