Speaker
Eric Gregory
(Juelich Supercomputing Center)
Description
The nature of low-lying scalar and axial-vector charmed mesons has long been debated, specifically whether they are best explained by hadronic molecular or compact tetraquark models. These two models predict quite different features for the accessible SU(3) multiplets in the scalar and axial-vector sectors.
We performed N_f=3+1 lattice simulations and calculate the energy levels of of the SU(3) [6] and [15] multiplets for both the scalar and axial-vector mesons.
In both sectors we find attractive states for the [6] and repulsive interactions for the [15]. This is consistent with the hadronic molecule picture, but not the compact tetraquark picture a low-lying [15] states in the axial-vector sector but not in the scalar sector.
| Parallel Session (for talks only) | Hadronic and nuclear spectrum and interactions |
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Authors
Eric Gregory
(Juelich Supercomputing Center)
Prof.
Feng-Kun Guo
(Insitute of Theoretical Physics, Chinese Academy of Sciences)
Christoph Hanhart
(IAS/IKP Forschungszentrum Jülich)
Stefan Krieg
Prof.
Thomas Luu
(Forshungszentrum Jülich)
