The Large Nc limit of meson interactions from lattice QCD

by Dr Fernando Romero (MIT)

Monday 29 May 2023, 12:00 → 13:30 Europe/Madrid

IFAE Seminar Room (Face to Face Only)

The limit of the large number of colors, also referred to as large Nc or 't Hooft limit, constitutes a simplification of QCD that preserves most of its non-perturbative properties, including confinement and spontaneous chiral symmetry breaking. It also leads to some definite predictions such as a non-existing Delta I=1/2 rule in the K-> pi pi isospin decay amplitudes. Many phenomenological approaches to hadron physics employ approximations inspired by this limit, even for quantities such as the former, where the large Nc prediction is off. In this talk, I will present our recent lattice results for some relevant light-meson observables, such as meson masses and decay constants, non-leptonic kaon decay amplitudes, and pion-pion scattering quantities.