Observation of an excess of di-charmonium events in the four-muon final state with the ATLAS detector
Year: 2024
Type: conference-paper
Abstract: An exploration of the $4mu$, di-charmonium channel in search for a full-charm tetraquark of the form $cc\bar{c}\bar{c}$ is conducted using the ATLAS detector with $140\text{ fb}^{-1}$ of $pp$ data at $\sqrt{s}=13\text{ TeV}$. Both the di-$J/\psi$ and the $J/\psi+\psi(2S)$ channels are explored and excesses over the background corresponding to a resonance at $6.9\text{ GeV}$ are seen with statistical significance of $>5\;\sigma$ and $4.7\;\sigma$, respectively. At lower mass ranges, a broader structure can be observed, though its nature cannot be discerned with current data.
DOI: 10.22323/1.443.0012
Author: Alina Hagan
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4404149772