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arXiv 1907.06255hep-th
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从渐近对称性看QCD中的广义相干态

Generalized coherent states in QCD from asymptotic symmetries

Anupam A H, Athira P.

摘要:

我们研究了量子色动力学的渐近对称性与真空跃迁之间的关系。从遥远过去的Fock真空开始,与QCD中(非阿贝尔)渐近对称性相关的守恒律的无穷大可以用来确定遥远未来的真空。我们表明,相应的渐近希尔伯特空间在未来产生的一类打扮状态,其中每个有限能量粒子是由相互作用的软胶子云打扮。我们确定的精确结构的敷料使用守恒定律,并表明相应的渐近状态是等价的广义相干态所定义的Catani等人。

英文摘要:

We investigate the relationship between asymptotic symmetries of QCD and vacuum transitions induced during scattering. Starting with the Fock vacuum in the far past, the infinity of conservation laws associated to (non-Abelian) asymptotic symmetries in QCD can be used to determine the vacuum in the far future. We show that the corresponding asymptotic Hilbert space in the future is generated by a class of dressed states in which each finite energy particle is dressed by a cloud of interacting soft gluons. We identify the precise structure of the dressing using conservation laws and show that the corresponding asymptotic states are equivalent to the generalised coherent states defined by Catani et al.

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