The Y(3940), Z(3930) and the X(4160) as dynamically generated resonances from the vector-vector interaction

TL;DR

This paper investigates certain charmonium-like resonances as dynamically generated states from vector-vector interactions, identifying them as hadronic molecules through a theoretical framework.

Contribution

It introduces a model using hidden gauge formalism to explain the nature of Y(3940), Z(3930), and X(4160) as molecular states from vector-vector interactions.

Findings

Identified five poles matching known resonances

Linked three poles to Y(3940), Z(3930), X(4160)

Proposed these states as D*D* and D_s*D_s* molecules

Abstract

We study the vector-vector interaction within the framework of the hidden gauge formalism for the sector with quantum numbers charm C=0 and strangeness S=0 in the region around 4000 MeV. We get five poles, three of which could be identified with the Y(3940), Z(3930) and X(4160). These poles appear with quantum numbers I=0 and $J^{PC}=0^{++},2^{++}$ and $2^{++}$, respectively, and can be considered as hadronic molecules made of $D^*\bar{D}^*$, $D_s^*\bar{D}^*_s$.