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- W2044181665 abstract "We study the nucleon and diquarks in a nonlocal Nambu--Jona--Lasinio model. For certain parameters the model exhibits quark confinement, in the form of a propagator without real poles. After truncation of the two-body channels to the scalar and axial-vector diquarks, a relativistic Faddeev equation for nucleon bound states is solved in the covariant diquark--quark picture. The dependence of the nucleon mass on diquark masses is studied in detail. We find parameters that lead to a simultaneous reasonable description of pions and nucleons. Both the diquarks contribute attractively to the nucleon mass. Axial-vector diquark correlations are seen to be important, especially in the confining phase of the model. We study the possible implications of quark confinement for the description of the diquarks and the nucleon. In particular, we find that it leads to a more compact nucleon." @default.
- W2044181665 created "2016-06-24" @default.
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- W2044181665 date "2004-12-14" @default.
- W2044181665 modified "2023-10-05" @default.
- W2044181665 title "Baryon structure in a quark-confining nonlocal Nambu–Jona–Lasinio model" @default.
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- W2044181665 doi "https://doi.org/10.1103/physrevc.70.065203" @default.
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