Diquark bound states with a completely crossed ladder truncation

Abstract

The Bethe-Salpeter equation in the diquark channel is investigated by employing the Dyson-Schwinger method together with the Munczek-Nemirovsky model. The novelty of our study is a resummation of completely crossed ladder diagrams in the Bethe-Salpeter kernel. These diagrams are enhanced due to their color factors in the diquark channel, but not in the meson channel. In our analysis, diquark bound-state solutions exist in the Bethe-Salpeter equation.

arXiv comment20 pages, 8 figures, 4 tables, v2: version published in PRD, v3: minor correction in Table 1

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• Aspects of open-flavour mesons in a comprehensive DSBSE study
• Effects of a dressed quark-gluon vertex in pseudoscalar heavy-light mesons