Abstract
Attraction between quarks is a fundamental aspect of QCD. It is plausible that several of the most profound aspects of low-energy QCD dynamics are connected to diquark correlations, including: paucity of exotics (which is the foundation of the quark model and of traditional nuclear physics), similarity of mesons and baryons, color superconductivity at high density, hyperfine splittings, Δ = 1/2 rule, and some striking features of structure and fragmentation functions. After a brief overview of these issues, I discuss how diquarks can be studied in isolation, both phenomenologically and numerically, and present approximate mass differences for diquarks with different quantum numbers. The mass-loaded generalization of the Chew-Prautschi formula provides an essential tool.
Original language | English (US) |
---|---|
Title of host publication | From Fields to Strings |
Subtitle of host publication | Circumnavigating Theoretical Physics: Ian Kogan Memorial Collection |
Publisher | World Scientific Publishing Co. |
Pages | 77-93 |
Number of pages | 17 |
Volume | 1 |
ISBN (Electronic) | 9789812775344 |
ISBN (Print) | 9789812389558 |
DOIs | |
State | Published - Jan 1 2005 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy(all)