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Diquark Correlations in Hadron Physics: Origin, Impact and Evidence
- Publication Year :
- 2020
-
Abstract
- The last decade has seen a marked shift in how the internal structure of hadrons is understood. Modern experimental facilities, new theoretical techniques for the continuum bound-state problem and progress with lattice-regularised QCD have provided strong indications that soft quark+quark (diquark) correlations play a crucial role in hadron physics. For example, theory indicates that the appearance of such correlations is a necessary consequence of dynamical chiral symmetry breaking, viz. a corollary of emergent hadronic mass that is responsible for almost all visible mass in the universe; experiment has uncovered signals for such correlations in the flavour-separation of the proton's electromagnetic form factors; and phenomenology suggests that diquark correlations might be critical to the formation of exotic tetra- and penta-quark hadrons. A broad spectrum of such information is evaluated herein, with a view to consolidating the facts and therefrom moving toward a coherent, unified picture of hadron structure and the role that diquark correlations might play.<br />Comment: 113 pages, 41 figures, 8 tables
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.2008.07630
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1016/j.ppnp.2020.103835