期刊
PHYSICAL REVIEW D
卷 80, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.80.025009
关键词
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资金
- NSF [PHY-0758032]
- ERC Advanced Investigator [226455]
- European Research Council (ERC) [226455] Funding Source: European Research Council (ERC)
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 nonminimal couplings. No additional fields or equations besides the spin 3/2 ones are needed to solve the problem.
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