Speaker
Richard Lebed
(Arizona State University)
Description
Hadronic physics has been immensely enriched in the past 14 years, with the addition of dozens of presumptive tetraquark and pentaquark states that have been discovered primarily in the charmonium and bottomonium sectors. Every year since 2003 has brought fresh discoveries, so this talk will start with a short tour of the new states and how the field stands at this moment. Then we will tour the various theoretical interpretations of the states (Spoiler alert: None of them are entirely satisfactory!). Finally, I will present my own contribution, the “dynamical diquark picture” of states bound not as molecules, but rather through a competition between large energy releases and the constraints of color confinement.
Primary author
Richard Lebed
(Arizona State University)
