# Pion-pion scattering at large Nc

Particle Physics Theory seminar

#### Pion-pion scattering at large Nc

• Event time: 2:00pm until 3:00pm
• Event date: 27th April 2022
• Speaker: Jorge Baeza Ballesteros (University of Valencia)
• Location: Higgs Centre Seminar Room, Room 4305,

### Event details

The large $N_\text{c}$ limit of QCD constitutes a simplification of the theory that preserves most of its non-perturbative features. This limit has proven to have predictive power in the non-perturbative regime, and is used by many phenomenological approaches to hadron physics. However, it fails to reproduce some experimental results. In this talk I will present some recent lattice results for pion-pion scattering in a theory with $N_\text{f}=4$ degenerate quark flavors and varying number of colors, focusing on two channels that do not include vacuum diagrams. I will discuss how they can be matched to chiral perturbation theory to extract the large $N_\text{c}$ scaling of the relevant low-energy couplings, and I compare them to previous lattice and phenomenological determinations.

### 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..