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arXiv 2410.04786hep-thgr-qchep-ph
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广义朗道-杨定理

Generalized Landau Yang Theorem

T. R. Govindarajan, Rakesh Tibrewala

AI总结:

本文将朗道-杨定理推广到超对称理论,禁止自旋1粒子衰变为两个光微子及zino衰变为光子加光微子,并证明通过光子质量或Stueckelberg质量项可规避这些选择定则。

摘要:

朗道-杨定理在过去几十年中广为人知。它禁止大质量自旋1粒子衰变为两个光子。这简单地源于庞加莱群的表示论和玻色统计。它不需要任何作用量或拉格朗日量。我们将该定理推广到具有超对称(SUSY)的理论中,这种理论甚至不允许衰变为两个光微子(马约拉纳费米子),也不允许 zino 衰变为一个光子和一个光微子。我们将证明,如果光子具有质量,无论多么小,该定理都可以被规避。我们还表明,上述超对称选择定则也可以通过 Stueckelberg 质量项被规避。文中还指出了进一步有趣的含义。

英文摘要:

Landau Yang theorem is well known for the past several decades. It prohibits the decay of a massive spin 1 particle to two photons. This emerges simply from the representation theory of the Poincare group and Bose Statistics. It does not require any action or Lagrangian. We generalize this theorem to theories with supersymmetry (SUSY) which disallows even decay to two photinos (Majorana fermions) as well as the decay of a zino to a photon and a photino. We will prove that if the photon has a mass, howsoever small, this theorem can be evaded. We also show that the supersymmetric selection rule above can also be evaded through the Stueckelberg mass term. Further interesting implications are also pointed out.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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