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Résumé |
Understanding how low-energy physics emerges from a system’s microscopic parameters is a
fundamental problem in theoretical physics. For the strong interaction, the UV theory is QCD—an
asymptotically free gauge theory with light quarks. At very low energies, confinement and chiral symmetry
breaking give rise to weakly interacting Goldstone bosons: the pions. In the intermediate energy regime,
however, both quark and pion descriptions become strongly coupled, making first-principles computations
difficult. In this talk, I will give a pedagogical presentation of the Gauge Theory Bootstrap -- a framework
for computing strongly coupled dynamics in this intermediate regime. The approach constructs S-
matrices, form factors, and correlation functions by combining general physical principles with information
from the controlled UV and IR limits. From these results, we extract scattering phase shifts and resonance
properties, finding good agreement with experimental data. Finally, I will use these results to discuss the
thermodynamics of a pion gas. Based on recent work with M. Kruczenski. |
