Nuclear Physics B (Jul 2024)

DPSV trick for spherically symmetric backgrounds

  • S. Mironov,
  • V. Volkova

Journal volume & issue
Vol. 1004
p. 116550

Abstract

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We discuss the approach suggested by Deffayet et al. (DPSV) to analysing the linearized perturbations in Horndeski theory in the case of a static, spherically symmetric background. In L3 subclass of Horndeski theories we prove the validity of the DPSV approach by showing that the original method corresponds to a specific gauge choice in the quadratic action for perturbations. We also show that in the case of a spherically symmetric background the DPSV trick does not work in a more general L4 Horndeski theory.