Massive poles in Lee-Wick quantum field theory
Massive poles in Lee-Wick quantum field theory
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DOI：
10.1103/physrevd.99.065017
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发表时间：
2018-12
影响因子：
5
通讯作者：
J. Donoghue;G. Menezes
中科院分区：
文献类型：
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作者：
J. Donoghue;G. Menezes
在Lee-Wick理论中，对传播子的讨论主要集中在传播子中存在两个大质量的复共轭极子。我们证明了在物理区域附近实际上只有一个极点，或者在另一个表示中有三个具有补偿额外极点的类极点结构。只有在谱积分中包含共振结构时，后一种修正的Lehmann表示在计算和概念上才是有用的。
Most discussions of propagators in Lee-Wick theories focus on the presence of two massive complex conjugate poles in the propagator. We show that there is in fact only one pole near the physical region, or in another representation three pole-like structures with compensating extra poles. The latter modified Lehmann representation is useful caculationally and conceptually only if one includes the resonance structure in the spectral integral.