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25.11.2024 / 13:15 - 14:15 / Zeuthen, 1.021 IRIS (Adlershof)
Lattice SeminarMeson-meson scattering at large Nc (4/8)
Dr. Jorge Baeza-Ballesteros (University of Valencia)
The large Nc limit of QCD is a simplification of the theory of strong interactions that preserves most of its non-perturbative features and has been used by many phenomenological approaches to QCD. However, subleading Nc effects are hard to estimate and can lead to incorrect predictions. In this talk, I will discuss how we are using lattice simulations to study these subleading Nc effects in the context of mesons-meson scattering in a theory with Nf=4 degenerate quark flavors. I will first discuss some results on pion-pion scattering near threshold, which we use to constrain the Nc scaling of low energy constants from chiral perturbation theory. Later, I will present some ongoing work that extends the previous study to higher energies. We focus on some channels expected to contain tetraquark resonances, aiming at constraining the Nc dependence of these states, around which there has been much controversy.
More Information: https://indico.desy.de/category/873/
