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arXiv 0906.1432hep-th
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带电自旋3/2场在外部电磁背景中的因果传播

Causal Propagation of a Charged Spin 3/2 Field in an External Electromagnetic Background

Massimo Porrati, Rakibur Rahman

摘要:

我们提出了一个大规模的拉格朗日,带电自旋3/2场在一个恒定的外部电磁背景,正确地传播光锥内的物理自由度。Velo-Zwanziger的非因果性和其他病态,如双曲线的损失或非物理的自由度的外观,避免了明智的选择非最小的耦合。除了自旋为3/2的场或方程之外,不需要额外的场或方程来解决这个问题。

英文摘要:

We present a Lagrangian for a massive, charged spin 3/2 field in a constant external electromagnetic background, which correctly propagates only physical degrees of freedom inside the light cone. The Velo-Zwanziger acausality and other pathologies such as loss of hyperbolicity or the appearance of unphysical degrees of freedom are avoided by a judicious choice of non-minimal couplings. No additional fields or equations besides the spin 3/2 ones are needed to solve the problem.

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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