Poles and poltergeists in e + e − → D D ¯ data

Hüsken, Nils (ORCID:0000000189719836); Lebed, Richard F. (ORCID:0000000181709844); Mitchell, Ryan E. (ORCID:0000000322484109); Swanson, Eric S. (ORCID:0000000173949215); Wang, Ya-Qian (ORCID:0000000150601347); Yuan, Chang-Zheng (ORCID:0000000216526686)

doi:10.1103/physrevd.109.114010

DOE OSTI · 2474239

Poles and poltergeists in e + e − → D D ¯ data

Hüsken, Nils (ORCID:0000000189719836)·Lebed, Richard F. (ORCID:0000000181709844)·Mitchell, Ryan E. (ORCID:0000000322484109)·Swanson, Eric S. (ORCID:0000000173949215)·Wang, Ya-Qian (ORCID:0000000150601347)·Yuan, Chang-Zheng (ORCID:0000000216526686)

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Abstract

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

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Hüsken, Nils (ORCID:0000000189719836), Lebed, Richard F. (ORCID:0000000181709844), Mitchell, Ryan E. (ORCID:0000000322484109), Swanson, Eric S. (ORCID:0000000173949215), Wang, Ya-Qian (ORCID:0000000150601347), Yuan, Chang-Zheng (ORCID:0000000216526686). 2024-06-07. Poles and poltergeists in e + e − → D D ¯ data. https://doi.org/10.1103/physrevd.109.114010

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