Quarkonia and heavy-light mesons in a covariant quark model
1 Centro de Física Teórica de Partículas, Instituto Superior Técnico (IST), Universidade de Lisboa, 1049-001 Lisboa, Portugal
2 Departamento de Física, Universidade de Évora, 7000-671 Évora, Portugal
3 Departamento de Física, Instituto Superior Técnico (IST), Universidade de Lisboa, 1049-001 Lisboa, Portugal
Published online: 25 March 2016
Preliminary calculations using the Covariant Spectator Theory (CST) employed a scalar linear confining interaction and an additional constant vector potential to compute the mesonic mass spectra. In this work we generalize the confining interaction to include more general structures, in particular a vector and also a pseudoscalar part, as suggested by a recent study . A one-gluon-exchange kernel is also implemented to describe the short-range part of the interaction. We solve the simplest CST approximation to the complete Bethe-Salpeter equation, the one-channel spectator equation, using a numerical technique that eliminates all singularities from the kernel. The parameters of the model are determined through a fit to the experimental pseudoscalar meson spectra, with a good agreement for both quarkonia and heavy-light states.
© Owned by the authors, published by EDP Sciences, 2016
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