Covariant actions and propagators for all spins, masses, and dimensions

Abstract

The explicit covariant actions and propagators are given for fields describing particles of all spins and masses, in any spacetime dimension. Massive particles are realized as "dimensionally reduced" massless particles. To obtain compact expressions for the propagators, it was useful to introduce an auxiliary vector coordinate $s^{\mu }$ and consider "hyperfields" that are functions of space $X^{\mu }$ and $s^{\mu }$. The actions and propagators serve as a basic starting point for concrete high spin computations amenable to dimensional regularization, provided that gauge invariant interactions are introduced.

arXiv commentv1, 37 pages; v2, references added; v3, published version

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Cited by in corpus (6)

• First Look at Quartic-in-Spin Binary Dynamics at Third Post-Minkowskian Order
• Spinning Black Hole Scattering at $\mathcal{O}(G^3{S}^2)$: Casimir Terms, Radial Action and Hidden Symmetry
• Consistent actions for massive particles interacting with electromagnetism and gravity
• On equivalence of gauge-invariant models for massive integer-spin fields
• On the photon mass generation in Rarita-Schwinger QED
• Unexpected Symmetries of Kerr Black Hole Scattering