29 citations · 29 across the 1 of their papers we have counts for
3 papers
The -meson: four-quark vs. two-quark components and decay width in a Bethe-Salpeter approach
Nico Santowsky, Gernot Eichmann, Christian S. Fischer +2
We study the dynamical generation of resonances in isospin singlet channels with mixing between two- and four-quark states. To this end we generalise a Bethe-Salpeter approach to f…
Disentangling different structures in heavy-light four-quark states
Paul C. Wallbott, Gernot Eichmann, Christian S. Fischer
Models proposed to explain recently discovered heavy-light four-quark states already assume certain internal structures, i.e. the (anti)quark constituents are grouped into diquark/…
as a four-quark state in a Dyson-Schwinger/Bethe-Salpeter approach
Paul C. Wallbott, Gernot Eichmann, Christian S. Fischer
We generalise the framework of Dyson-Schwinger and Bethe-Salpeter equations for four-quark states to accommodate the case of unequal quark masses. As a first application, we consid…