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arXiv 1906.05040hep-thnlin.PS
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二分量标量场理论模型中的非拓扑扭结散射

Non-topological kink scattering in a two-component scalar field theory model

Alberto Alonso-Izquierdo

摘要:

本文分析了一类二分量标量场理论模型中非拓扑扭结间的散射。这些缺陷携带着缠绕电荷。因此,出现了两种不同类型的扭结散射过程:(1)具有相同缠绕数的扭结之间的碰撞和(2)具有相反缠绕数的扭结之间的散射事件。散射通道的种类非常丰富,并且强烈依赖于碰撞速度和模型参数。对于第一种类型的事件,发现四个不同的散射通道:\textit{kink reflection}(扭结碰撞并反弹),\textit{one-kink (partial) annihilation}(两个非拓扑扭结碰撞,导致每个扭结的一半湮灭,并且随后另两个一半重新结合,产生具有相反缠绕电荷的新的非拓扑扭结),\textit{winding flip kink reflection}(扭结与相反的缠绕电荷碰撞并出现)和\textit{total kink annihilation}(扭结碰撞并衰减为真空构型)。对于第二种类型的事件,散射通道包括\textit{bion formation}(扭结和反扭结形成长寿命束缚态)、\textit{kink-antikink passage}(扭结碰撞并彼此通过)和\textit{kink-antikink annihilation}(扭结和反扭结碰撞并衰减到真空构型)。

英文摘要:

In this paper the scattering between the non-topological kinks arising in a family of two-component scalar field theory models is analyzed. A winding charge is carried by these defects. As a consequence, two different classes of kink scattering processes emerge: (1) collisions between kinks that carry the same winding number and (2) scattering events between kinks with opposite winding number. The variety of scattering channels is very rich and it strongly depends on the collision velocity and the model parameter. For the first type of events, four distinct scattering channels are found: \textit{kink reflection} (kinks collide and bounce back), \textit{one-kink (partial) annihilation} (the two non-topological kinks collide causing the annihilation of one half of each kink and the subsequent recombination of the other two halves, giving rise to a new non-topological kink with the opposite winding charge), \textit{winding flip kink reflection} (kinks collide and emerge with the opposite winding charge) and \textit{total kink annihilation} (kinks collide and decay to the vacuum configuration). For the second type of events, the scattering channels comprise \textit{bion formation} (kink and antikink form a long-living bound state), \textit{kink-antikink passage} (kinks collide and pass each other) and \textit{kink-antikink annihilation} (kink and antikink collide and decay to the vacuum configuration).

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。

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