Instituut-Lorentz for Theoretical Physics, Leiden, The Netherlands.
Phys Rev Lett. 2010 Jul 9;105(2):021601. doi: 10.1103/PhysRevLett.105.021601.
We report the first observation of multiple intercommutation (more than two successive reconnections) of Abelian Higgs cosmic strings at ultrahigh collision speeds, and the formation of "kink trains" with up to four closely spaced left- or right-moving kinks, in the deep type-II regime 16 ≤ β ≤ 64 (where β=m(scalar)2/m(gauge)2). The minimum critical speed for double reconnection goes down from ∼0.98c at β = 1 to ∼0.86c for β = 64. The process leading to the second intercommutation changes with β: it involves an expanding loop if β ≥ 16, but only a radiation blob if 1 < β ≤ 8. Triple reconnections are generic in the loop-mediated regime for collision parameters on the boundary between single and double reconnection. For β = 16 we observe quadruple events. We comment on the effect of strongly repulsive core interactions on the small scale structure on the strings and their gravitational wave emission.
我们首次观察到了在超高碰撞速度下，阿贝尔-希格斯宇宙弦的多次交换（超过两个连续的重联），以及在深度类型-II区域 16 ≤ β ≤ 64 中形成多达四个紧密间隔的左或右移动扭结的“扭结列车”（其中β=m（标量）2/m（规范）2）。双重重联的最小临界速度从β=1 时的约 0.98c 下降到β=64 时的约 0.86c。导致第二次重联的过程随β而变化：如果β≥16，则涉及一个扩展的环，如果1<β≤8，则仅涉及一个辐射团。在单重联和双重联之间的碰撞参数边界上的环介导区域中，三重联是普遍存在的。对于β=16，我们观察到了四重事件。我们评论了强排斥核相互作用对弦上小尺度结构及其引力波发射的影响。
