https://doi.org/10.1140/epjc/s10052-016-3920-4
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
* e-mail: zgwang@aliyun.com
Received:
21
December
2015
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
