Diquark-Antidiquark with open charm in QCD sum rules

M. Nielsen, R. D. Matheus, F. S. Navarra +2

Using the QCD sum rule approach we investigate the possible four-quark structure of the recently observed charmed scalar mesons $D_0^0(2308)$ (BELLE) and $D_0^{0,+}(2405)$ (FOCUS…