A -anomalous interactions of the holographic dilaton

Csaba Csáki, Jay Hubisz, Ameen Ismail, Gabriele Rigo, Francesco Sgarlata

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


We explore higher-derivative terms in the low-energy effective action for the dilaton, the Goldstone boson of spontaneously broken scale invariance. Focusing on the simplest holographic realization of spontaneously broken scale invariance, the Randall-Sundrum (RS) scenario, we identify the nonlinear action for the RS dilaton by integrating out Kaluza-Klein graviton modes. The coefficient of a particular fourth-derivative dilaton self-interaction can be identified with the Weyl a-anomaly of the dual conformal field theory, which we use to verify anomaly matching arguments. We also find novel, a-dependent couplings of the dilaton to light matter fields. These anomalous interactions can have a significant effect on the collider phenomenology and the cosmology, potentially allowing us to probe the structure of the underlying conformal sector via low-energy physics. The dilaton effective theory also serves as an interesting scalar analog of gravity, and we study solutions to the equation of motion that parallel black holes and cosmologies.

Original languageEnglish (US)
Article number055004
JournalPhysical Review D
Issue number5
StatePublished - Sep 1 2022

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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