# The puzzle of excessive non-$Dar D$ component of the inclusive $ψ3770$ decay and the long-distant contribution - High Energy Physics - Phenomenology

The puzzle of excessive non-$Dar D$ component of the inclusive $ψ3770$ decay and the long-distant contribution - High Energy Physics - Phenomenology - Download this document for free, or read online. Document in PDF available to download.

Abstract: In this letter we suggest that the obvious discrepancy between theoreticalprediction on the $\mathrm{non}-D\bar D$ decays of $\psi3770$ and data is tobe alleviated by taking final state interaction FSI into account. By assumingthat $\psi3770$ overwhelmingly dissociates into $D\bar D$, then the finalstate interaction induces a secondary process, we calculate the branchingratios of $\psi3770\to D\bar D\to J-\psi\eta, ho\pi, \omega\eta, K^*K$. Ourresults show that the branching ratio of $\psi3770\to \mathrm{non}-D\bar{D}$can reach up to $\mathcal{B} {\mathrm{non}-D\bar{D}}^{FSI}=0.2\sim1.1%$ whiletypical parameters $I=0.4$ GeV$^{-2}$ and $\alpha=0.8\sim 1.3$ are adopted.This indicates that the FSI is obviously non-negligible.

Author: Xiang Liu, Bo Zhang, Xue-Qian Li

Source: https://arxiv.org/