从衰变到完全断裂：SU中的弦（2）杨-米尔斯理论
From Decay to Complete Breaking: Pulling the Strings in SU(2) Yang-Mills Theory
摘要：
本文研究了（2+1）-dSU（2）Yang-Mills理论中连接两个静电荷Q的{2 Q +1}-弦。虽然两个电荷Q = 1/2之间的基本{2}-弦是牢不可破的，但连接两个电荷Q = 1的伴随{3}-弦可以断裂。当一个{4}-弦被拉伸到超过一个临界长度时，它通过胶子对的产生而衰变成一个{2}-弦。当一个{5}-弦被拉伸时，它首先衰减成一个{3}-弦，最终完全断裂。弦两端屏蔽电荷的能量可用唯象组分胶子模型来描述。
英文摘要：
We study {2Q+1}-strings connecting two static charges Q in (2+1)-d SU(2) Yang-Mills theory. While the fundamental {2}-string between two charges Q = 1/2 is unbreakable, the adjoint {3}-string connecting two charges Q = 1 can break. When a {4}-string is stretched beyond a critical length, it decays into a {2}-string by gluon pair creation. When a {5}-string is stretched, it first decays into a {3}-string, which eventually breaks completely. The energy of the screened charges at the ends of a string is well described by a phenomenological constituent gluon model.
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