Strong couplings of charmed mesons and quarkonia
- Author(s)
- Wolfgang Lucha, Dmitri Melikhov, Hagop Sazdjian, Silvano Simula
- Abstract
We extract the strong coupling constants of three mesons, each of which is composed of either two charm quarks or one charm quark and one light (i.e., u, d, or s) quark, from the matrix elements for the transitions of two of these mesons induced by appropriate quark currents within the framework of a relativistic dispersion approach to the constituent-quark picture of mesons. Among others, we also analyse the impact of the violation of the SU(3) flavour symmetry by the quark masses. In the case of mesons containing one light quark, we observe, in two respects, discrepancies between our findings and the predictions of QCD sum rules: our strong couplings exceed considerably the ones emerging from QCD sum rules, and, in our approach, the replacement of a light quark by a strange quark entails, in contrast to QCD sum rules, a reduction of the magnitudes of the strong couplings.
- Organisation(s)
- Particle Physics
- External organisation(s)
- Österreichische Akademie der Wissenschaften (ÖAW), Anuchin Research Institute and Museum of Anthropology, Universität Wien, Centre National De La Recherche Scientifique (CNRS), Istituto Nazionale di Fisica Nucleare (INFN), Roma
- Journal
- Proceedings of Science (PoS)
- Volume
- 234
- No. of pages
- 6
- DOI
- https://doi.org/10.22323/1.234.0428
- Publication date
- 2016
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103034 Particle physics
- ASJC Scopus subject areas
- General
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/strong-couplings-of-charmed-mesons-and-quarkonia(8f2c9236-280a-4911-8e1a-48396922c99e).html