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Diquarks as Inspiration and as Objects | | Frank Wilczek
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15 Sep 2004 | | Subject: | hep-ph nucl-th | | Abstract: | 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, $Delta I = 1/2$ 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-Frautschi formula provides an essential tool. | | Source: | arXiv, hep-ph/0409168 | | Services: | Forum | Review | PDF | Favorites | |
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