# Crafting chiral Lagrangians: the MINIBAR approach

#### Crafting chiral Lagrangians: the MINIBAR approach

- Event time: 2:00pm until 3:00pm
- Event date: 10th April 2024
- Speaker: Joan Ruiz-Vidal (Lund University)
- Location: Higgs Centre Seminar Room, Room 4305, James Clerk Maxwell Building (JCMB) (James Clerk Maxwell Building (JCMB)) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB

### Event details

Title: Crafting chiral Lagrangians: the MINIBAR approach

Abstract: The low-energy dynamics of the strong force are captured by Chiral Perturbation Theory (ChPT), an effective field theory based on the symmetries of Quantum Chromodynamics. As an effective field theory, it allows for progressively improvable descriptions through the inclusion of higher-order Lagrangians. In this seminar, ChPT will be introduced along with the derivation of the anomalous chiral Lagrangian at next-to-next-to-leading order (p^8). For this purpose, we will present the software MINIBAR: tools to calculate minimal operator bases rapidly with Mathematica. With it, another example of chiral Lagrangian will be explored, this time computing the effective couplings of pseudoscalar mesons to gravity, a step towards extracting their gravitational form factors.

### 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..