Effects of a dressed quark-gluon vertex in vector heavy-light mesons and theory average of the Bc* meson mass
Abstract
We extend earlier investigations of heavy-light pseudoscalar mesons to the vector case, using a simple model in the context of the Dyson-Schwinger-Bethe-Salpeter approach. We investigate the effects of a dressed quark-gluon vertex in a systematic fashion and illustrate and attempt to quantify corrections beyond the phenomenologically very useful and successful rainbow-ladder truncation. In particular we investigate the dressed quark-photon vertex in such a setup and make a prediction for the experimentally as yet unknown mass of the Bc* , which we obtain at 6.334 GeV well in line with predictions from other approaches. Furthermore, we combine a comprehensive set of results from the theoretical literature. The theoretical average for the mass of the Bc* meson is 6.336 ±0.002 GeV .
- Publication:
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Physical Review D
- Pub Date:
- April 2016
- DOI:
- 10.1103/PhysRevD.93.074010
- arXiv:
- arXiv:1602.05002
- Bibcode:
- 2016PhRvD..93g4010G
- Keywords:
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- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment
- E-Print:
- 16 pages, 7 figures, 2 tables, revised version incorporating reviewer comments