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arXiv · 1408.1077

First look at heavy-light mesons with a dressed quark-gluon vertex

Maria Gomez-Rocha·Thomas Hilger·Andreas Krassnigg
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Abstract

Following up on earlier work, we investigate possible effects of a dressed quark-gluon vertex in heavy-light mesons. In particular, we study corrections to the popular rainbow-ladder truncation of the Dyson-Schwinger-Bethe-Salpeter equation system. We adopt a simple interaction kernel which reduces the resulting set of coupled integral equations to a set of coupled algebraic equations, which are solved numerically. In this way, we extend previous studies to quark-antiquark systems with unequal current-quark masses, at first for the pseudoscalar case, and investigate the resulting set of problems and solutions. We attempt to find patterns in - as well as to quantify corrections to - the rainbow-ladder truncation. In addition, we open this approach to phenomenological predictions of the heavy quark symmetry.

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Maria Gomez-Rocha, Thomas Hilger, Andreas Krassnigg. 2014-08-05. First look at heavy-light mesons with a dressed quark-gluon vertex. https://doi.org/10.1007/s00601-014-0938-8

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