Abstract

NIELSEN, M.; NAVARRA, F. S.  and  BRACCO, M. E.. Investigating the tetraquark structure of the new mesons. Braz. J. Phys. [online]. 2007, vol.37, n.1a, pp. 56-58. ISSN 0103-9733.  http://dx.doi.org/10.1590/S0103-97332007000100018.

Using the QCD sum rule approach we investigate the vertex associated with the decay D⁰(0⁺)® D⁺p^-, where the scalar meson D⁰(0⁺) is considered as a four-quark state $(cd)(\bar{u}\bar{d})$. Although our results for the mass and partial decay width are smaller than the mass and the total decay width of the broad scalar meson D₀^*0(2308) reported by BELLE Collaboration, we can not discard the possibility that the BELLE's resonance can be interpreted as the four-quark state studied here.

Keywords : QCD sum rules; Four-quark states; Scalar mesons.