Regular Article - Theoretical Physics
Analysis of the , , , and as vector tetraquark states with QCD sum rules
Department of Physics, North China Electric Power University, Baoding, 071003, People’s Republic of China
* e-mail: firstname.lastname@example.org
Accepted: 22 April 2014
Published online: 9 May 2014
In this article, we distinguish the charge conjugations of the interpolating currents, calculate the contributions of the vacuum condensates up to dimension-10 in the operator product expansion, and we study the masses and pole residues of the hidden charmed tetraquark states with the QCD sum rules. We suggest a formula with the effective mass to estimate the energy scales of the QCD spectral densities of the hidden charmed tetraquark states, which works very well. The numerical results disfavor assigning the , , and as the diquark–antidiquark (with the Dirac-spinor structure ) type vector tetraquark states, and they favor assigning the , as the diquark–antidiquark type tetraquark states. While the masses of the tetraquark states with symbolic quark structures and favor assigning the as the diquark–antidiquark type tetraquark state, more experimental data are still needed to distinguish its quark constituents. There are no candidates for the positive charge conjugation vector tetraquark states; the predictions can be confronted with the experimental data in the future at the BESIII, LHCb and Belle-II.
© SIF and Springer-Verlag Berlin Heidelberg, 2014