Poles and poltergeists in $e^{+}{e}^{-}\to D\overline{D}$ data

Journal Article · 07 June 2024 · Physical Review. D.

DOI: https://doi.org/10.1103/PhysRevD.109.114010 · OSTI ID:2474239

Hüsken, Nils ; Lebed, Richard F. ; Mitchell, Ryan E. ; Swanson, Eric S. ; Wang, Ya-Qian ; Yuan, Chang-Zheng

A recent report of $e^{+}{e}^{-}\to D\overline{D}$ events by the BESIII collaboration suggests the presence of a structure $R$ at 3900 MeV. We argue that this structure, called $G\left(3900\right)$ in the past, is not in fact due to a new $c\overline{c}$ resonance but rather naturally emerges due to a combination of interference between nearby resonances and the opening of the $D^{*}\overline{D}$ channel. We further find that the appearance of this structure does not require suppression because of a radial node in the $\psi \left(4040\right)$ wave function, although a node improves fit quality. The measured $e^{+}{e}^{-}$ coupling of $\psi \left(4040\right)$ is found to be substantially smaller than previously estimated. In addition, we report new corrections to the measured cross section $\sigma (e^{+}{e}^{-}\to D\overline{D})$ at energies near $\psi \left(3770\right)$ . Published by the American Physical Society 2024

• Sponsoring Organization: USDOE
• Grant/Contract Number: FG02-05ER41374; SC0019232
• OSTI ID: 2474239
• Journal Information: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 11 Vol. 109; ISSN PRVDAQ; ISSN 2470-0010
• Publisher: American Physical SocietyCopyright Statement
• Country of Publication: United States
• Language: English