非对易时空中的涡旋散射与宇宙弦的相互交换
Vortex Scattering and Intercommuting Cosmic Strings on a Noncommutative Spacetime
摘要：
我们研究非对易涡旋的散射，基于[Phys. Rev. D 75，045009（2007）]中发展的非对易场论，作为理解宇宙弦相互作用的一种方式。在质心框架中，非对易性的影响消失了，因此宇宙弦的重联以与对易情况相同的方式发生。然而，当散射发生在质心系以外的系中时，弦仍然会重新连接，但众所周知的90度散射不再需要对应于弦的碰撞，这是由于基础的非对易场论中洛伦兹不变性的崩溃。
英文摘要：
We study the scattering of noncommutative vortices, based on the noncommutative field theory developed in [Phys. Rev. D 75, 045009 (2007)], as a way to understand the interaction of cosmic strings. In the center-of-mass frame, the effects of noncommutativity vanish, and therefore the reconnection of cosmic strings occurs in an identical manner to the commutative case. However, when scattering occurs in a frame other than the center-of-mass frame, strings still reconnect but the well known 90-degree scattering no longer need correspond to the head on collision of the strings, due to the breakdown of Lorentz invariance in the underlying noncommutative field theory.
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