Four-Charm-Quark Matter from the CMS Collaboration as a Witness of the Development of High-Precision Hadron Spectroscopy
Abstract
Recent CMS observations in the di-J/ invariant mass spectrum reveal new structures at 6638 MeV (X(6600))) and 7134 MeV, and confirm the X(6900) at 6847 MeV. These findings provide crucial insights into four-charm-quark matter. The CMS Collaboration's result serves as a testament to the progress in exploring exotic hadronic matter.
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