Year: 2026
Type: preprint
Abstract: The production ratios of hidden-charm hadrons observed in nuclear collisions reflect the degree of separation that the precursor $c\bar c$ pair develops inside the quark-gluon plasma. The respective hadronisation amplitude manifests this relation through the position-space inner products of the in-medium and in-vacuum $c\bar c$ wave functions. The exotic $X(3872)$, whose structure accommodates a dominant loosely bound molecular component together with a smaller compact component, stands as a novel hard probe of this spatial dependence. In this Letter, relative production measurements of $J/ψ$, $ψ(2S)$ and $X(3872)$ hadrons performed by the LHC collaborations are understood through the spatial dispersion of in-medium charm anti-charm systems.
Source: arXiv (Cornell University)
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: Centro de Física e Engenharia de Materiais Avançados, Centro de Física e Engenharia de Materiais Avançados, G2031922906, Laboratório de Física para Materiais e Tecnologias Emergentes, G6997658380, Centro de Física e Engenharia de Materiais Avançados, Laboratório de Instrumentação e Física Experimental de Partículas
OpenAlex ID: W7165649255