Discovering an Unquenched Dynamics Mechanism for Charmonium Scattering
Qi Huang, Rui Chen, Jun He, and Xiang Liu
TL;DR
This paper introduces an unquenched mechanism for charmonium scattering based on internal structure and virtual meson exchange, successfully matching experimental di-J/psi spectra.
Contribution
It presents a novel unquenched approach utilizing virtual meson exchange to explain charmonium scattering, applicable to all fully heavy hadrons.
Findings
Reproduces di-J/psi invariant mass spectrum observed by CMS and LHCb.
Provides a comprehensive framework for charmonium scattering involving heavy hadrons.
Abstract
In this work, we propose an unquenched mechanism for charmonium scattering that utilizes the internal structure of charmonium. By capturing light flavor quarks and anti-quarks from the vacuum, charm and anti-charm quarks form virtual charmed mesons, which mediate an effective one-boson exchange process. This approach accurately reproduces the di- invariant mass spectrum observed by CMS and LHCb, demonstrating its validity. Our mechanism offers a comprehensive framework for understanding charmonium scattering and is applicable to the scattering problems involving all fully heavy hadrons, an area of increasing interest.
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