Triangle Nuclear Theory Colloquium - Three-body dynamics of hadrons

Presenter: Sebastian Dawid

Over the past two decades, a wave of "exotic" hadrons has challenged the traditional quark model of hadrons. Candidates for tetraquarks, pentaquarks, molecular states, hybrids, and glueballs have revitalized hadron spectroscopy. Many of these intriguing states decay strongly into three or more particles, making their interpretation particularly challenging. Due to poorly understood three-body interactions, extracting their masses and widths requires advanced techniques at the intersection of lattice QCD and scattering theory.

In this colloquium, I will explain why three-body physics has become central to modern hadron spectroscopy and how recent progress is enabling more reliable extractions of resonance properties. I will highlight key formal advances connecting finite-volume field theory and analytic properties of three-particle scattering amplitudes, and will discuss applications ranging from Efimov physics to the doubly charmed tetraquark T_{cc} and mixed light-meson systems. I will conclude with a perspective on where the field is heading, including opportunities for lattice QCD and amplitude analysis in the coming years.

Contact

Amy Nicholson
annichol@email.unc.edu