发表机构
Université Libre de Bruxelles; International Solvay Institutes(布鲁塞尔自由大学; 国际索尔维研究所)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
本文证明大质量粒子在无穷大boost极限下经Inönü--Wigner收缩变为无质量粒子,其自旋多重态重组为不同螺旋度的无质量粒子直和,为Stückelberg表述和Goldstone等价定理提供群论基础。
AI 中文摘要
无质量粒子,通过Wigner的庞加莱群诱导表示定义,可视为无穷大boost的大质量粒子的极限,其中大质量小群经历Inönü--Wigner收缩变为无质量小群。本文证明,大质量表示的自旋-$s$多重态重组为螺旋度在$[-s,s]$范围内的无质量粒子的直和。这一群论结果是自旋$s$大质量场在高能极限下Stückelberg表述的希尔伯特空间对应物,其中Stückelberg场变为独立的、自旋$s'\leq s$(以整数步递减)的无质量场。因此,它也提供了Goldstone等价定理的运动学背景。
英文摘要
Massless particles, defined through Wigner's induced representations of the Poincaré group, are obtained as a limit of infinitely boosted massive particles wherein the massive little group undergoes an Inönü--Wigner contraction to the massless one. It is demonstrated that the spin-$s$ multiplet of a massive representation re-organizes into the direct sum of massless particles with helicities in the range $[-s,s]$. This group theoretic result is the Hilbert space counterpart of the Stückelberg formulation of massive fields of spin $s$ in the high-energy limit, where the Stückelberg fields become independent massless fields of spins $s'\leq s$ in integer steps. It therefore also provides the kinematic setting of the Goldstone equivalence theorem.
Comments6 pages