Jul 11 – 22, 2022
Mainz Institute for Theoretical Physics, Johannes Gutenberg University
Europe/Berlin timezone

a-Anomalous Interactions of the Holographic Dilaton

Jul 21, 2022, 10:30 AM
45m
02.430 (Mainz Institute for Theoretical Physics, Johannes Gutenberg University)

02.430

Mainz Institute for Theoretical Physics, Johannes Gutenberg University

Staudingerweg 9 / 2nd floor, 55128 Mainz

Speaker

Gabriele Rigo

Description

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 four-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.

Primary author

Gabriele Rigo

Presentation materials

There are no materials yet.