# The Dilaton Potential and Lattice Data

#### The Dilaton Potential and Lattice Data

- Event time: 2:00pm
- Event date: 8th January 2020
- Speaker: James Ingoldby (ICTP - Trieste)
- Location: Higgs Centre Seminar Room, Room 4305, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB

### Event details

Lattice studies of a certain class of confining gauge theories indicate the presence of an anomalously light scalar in the spectrum of composites. Gauge theories in this class are chosen to have a light fermion count lying just below the threshold value for entry into the conformal window. In this talk, I will discuss recent work in which this light scalar is interpreted as a dilaton and a simple EFT description for it is studied and used to analyse recent lattice results. In this work, we adopt a simple form for the dilaton potential in the EFT, which interpolates among earlier proposals. It describes departures from conformal symmetry, by the insertion of a single operator at leading order in the EFT. Using the lattice measurements, we extract model parameter values, including those that characterise the scalar potential. The results suggest that the EFT provides a good fit to the data, and include the possibility that the conformal deformation is clearly non-marginal.

### About Particle Physics Theory seminars

The Particle Physics Theory seminar is a weekly series of talks reflecting the diverse interests of the group. Topics include analytic and numerical calculations based on the Standard Model of elementary particle physics, theories exploring new physics, as well as more formal developments in gauge theories and gravity..