Regular Article - Theoretical Physics
Possible pentaquark candidates: new excited states
Department of Physics, North China Electric Power University, Baoding, 071003, People’s Republic of China
Accepted: 11 June 2018
Published online: 18 June 2018
In this article, we study the axialvector-diquark–scalar-diquark–antiquark type charmed pentaquark states with with the QCD sum rules by carrying out the operator product expansion up to the vacuum condensates of dimension 13 in a consistent way. In calculations, we separate the contributions of the negative parity and positive parity pentaquark states unambiguously, and choose three sets input parameters to study the masses and pole residues of the charmed pentaquark states and in details. Then we estimate the masses of the charmed pentaquark states , , and with to be according to the SU(3) breaking effects, which is compatible with the , , , .
© The Author(s), 2018