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arXiv · 2606.16745

Effective Goldstone dynamics on cosmological space-times

Marc Schneider
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Abstract

We derive the Lehmann-Symanzik-Zimmermann reduction formalism for a massive spin-2 particle on Minkowski spacetime and extend the formalism to cosmological spacetimes. The reduction formalism allows for a versatile proof that the Goldstone boson equivalence theorem holds in Friedmann-Lema\^itre-Robertson-Walker space-times. For the de Sitter and the radiation filled universe, we investigate the Goldstone dynamics and perform an analysis of the range of validity provided by the effective kinetic operator.

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Marc Schneider. 2026-06-15. Effective Goldstone dynamics on cosmological space-times. https://doi.org/10.1103/brs1-x1dz

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