Effective masses of diquarks

Details Effective masses of diquarks Effective masses of diquarks

2002-04-05

arxiv.org/abs/nucl-th/0204020v1

Few Body Syst. 32 (2002) 41-52

Physics

Nuclear Physics

Nuclear Theory

14 pages, 4 figures, to appear in Few-Body Systems

Scientific paper

10.1007/s00601-002-0111-7

We study meson and diquark bound states using the rainbow-ladder truncation of QCD's Dyson-Schwinger equations. The infrared strength of the rainbow-ladder kernel is described by two parameters. The ultraviolet behavior is fixed by the one-loop renormalization group behavior of QCD, which ensures the correct asymptotic behavior of the Bethe-Salpeter amplitudes and brings important qualitative benefits. The diquark with the lowest mass is the scalar, followed by the axialvector and pseudoscalar diquark. This ordering can be anticipated from the meson sector.

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