Simulating the charged charmoniumlike structure $Z_c(4025)$

TL;DR

This paper investigates the $Z_c(4025)$ structure by simulating the decay process of $Y(4260)$ into $D^*ar{D}^* ext{-} ext{pi}^+$, revealing a charged enhancement consistent with experimental observations.

Contribution

It introduces a theoretical model for the decay process that reproduces the charged charmoniumlike structure $Z_c(4025)$ observed experimentally.

Findings

Charged enhancement structure appears in the $D^*ar{D}^*$ invariant mass spectrum.

The simulation supports the interpretation of $Z_c(4025)$ as a molecular state.

The model aligns with recent experimental data on $Z_c(4025)$.

Abstract

Inspired by recent observation of charged charmoniumlike structure $Z_c(4025)$, we explore the $Y(4260)\to (D^*\bar{D}^*)^- \pi^+$ decay through the initial-single-pion-emission mechanism, where the $D^*\bar{D}^*\to D^*\bar{D}^*$ interaction is studied by the ladder approximation including a non-interacting case. Our calculation of the differential decay width for $Y(4260)\to (D^*\bar{D}^*)^- \pi^+$ indicates that a charged enhancement structure around $D^*\bar{D}^*$ appears in the $D^*\bar{D}^*$ invariant mass spectrum for this process, which can correspond to newly observed $Z_c(4025)$ structure.