Analysis of the vector hidden-charm-hidden-strange tetraquark states with implicit P-waves via the QCD sum rules

Abstract

We take the scalar, pseudoscalar, axialvector, vector and tensor diquarks as the basic building blocks to construct the four-quark currents with implicit P-waves, and investigate the hidden-charm-hidden-strange tetraquark states with the JPC=1−− and 1−+ via the QCD sum rules in a comprehensive and consistent way, and revisit the assignments of the X/Y states, especially the Y(4500), X(4630), Y(4660), Y(4710) and Y(4790), in the tetraquark picture.