Meson spectroscopy from lattice QCD
Andrew W. Jackura
Abstract
Determining the meson spectrum directly from Quantum Chromodynamics (QCD) remains a central challenge, since QCD is strongly coupled at low energies and most excited states appear as resonances in hadronic decay channels. Advances in lattice QCD and scattering theory now provide a systematic framework for extracting meson spectra and resonance properties from first principles. Here I present an overview of this program and review current state-of-the-art calculations in meson spectroscopy from lattice QCD. I highlight recent progress in the extraction of resonant and coupled-channel amplitudes, along with frontier developments in three-body dynamics and the determination of meson photo-couplings. Together, these advances are bringing us closer to a comprehensive first-principles description of the excited meson spectrum.
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