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26 April 2024

» arxiv » 2008.07630

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Diquark Correlations in Hadron Physics: Origin, Impact and Evidence
M. Yu. Barabanov ; M. A. Bedolla ; W. K. Brooks ; G. D. Cates ; C. Chen ; Y. Chen ; E. Cisbani ; M. Ding ; G. Eichmann ; R. Ent ; J. Ferretti ; R. W. Gothe ; T. Horn ; S. Liuti ; C. Mezrag ; A. Pilloni ; A. J. R. Puckett ; C. D. Roberts ; P. Rossi ; G. Salme ; E. Santopinto ; J. Segovia ; S. N. Syritsyn ; M. Takizawa ; E. Tomasi-Gustafsson ; P. Wein ; B. B. Wojtsekhowski ;
Date:	17 Aug 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.
Source:	arXiv, 2008.07630
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