Regular Article - Theoretical Physics
Analysis of and as pentaquark states in the diquark model with QCD sum rules
Department of Physics, North China Electric Power University, Baoding, 071003, People’s Republic of China
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Accepted: 1 February 2016
Published online: 12 February 2016
In this article, we construct the diquark–diquark–antiquark type interpolating currents, and we study the masses and pole residues of the and hidden charm pentaquark states in detail with the QCD sum rules by calculating the contributions of the vacuum condensates up to dimension-10 in the operator product expansion. In the calculations, we use the formula to determine the energy scales of the QCD spectral densities. The present predictions favor assigning and to be the and pentaquark states, respectively.
© The Author(s), 2016