Abstract
Investigation of the massive propagators allows us to exhibit indecomposable representations appearing with masslessness. By direct examination of the propagators, we prove that massless fields in 3+2 De Sitter space propagate on the light cone. Indeed, it will be shown that a choice of gauge, in which all propagation is confined to the light cone, exists and, in this context, explicit expressions of homogeneous propagators for massless half-integer spin fields are obtained.
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Lesimple, M. Homogeneous propagators for massless half-integer spin fields in 3+2 De Sitter space. Lett Math Phys 18, 315–323 (1989). https://doi.org/10.1007/BF00405263
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DOI: https://doi.org/10.1007/BF00405263